Title of Invention: Derivative With Heteroaromatic Ring, and Light-Emitting Element, Light-Emitting Device, Lighting Device, and Electronic Device Using Derivative With Heteroaromatic Ring Abstract: A derivative with a heteroaromatic ring represented by General Formula (G1) is provided. R11 to R20 in the formula independently represent a hydrogen atom, an alkyl group having 1 to 4 carbon atoms, or an aryl group having 6 to 10 carbon atoms in a ring. J represents a substituted or unsubstituted arylene group having 6 to 12 carbon atoms in a ring. Note that α and β may be bonded to each other to form a carbazole skeleton. Het is a substituent represented by General Formula (S1-1) or (S1-2). In General Formulae (S1-1) and (S1-2), Ar1 to Ar4 are independently a substituted or unsubstituted aryl group having 6 to 10 carbon atoms in a ring. R1 is a hydrogen atom, an alkyl group having 1 to 4 carbon atoms, or an aryl group having 6 to 10 carbon atoms in a ring. Detailed Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a derivative with a heteroaromatic ring, and a light-emitting element, a light-emitting device, a lighting device, and an electronic device each using a derivative with a heteroaromatic ring. 2. Description of the Related Art In recent years, research and development of light-emitting elements using electroluminescence have been extensively conducted. In the basic structure of such a light-emitting element, a layer including a light-emitting substance is interposed between a pair of electrodes. By applying a voltage to this element, light emission can be obtained from the light-emitting substance. Since this type of light-emitting element is a self-luminous type, it has advantages over a liquid crystal display in that visibility of a pixel is high and that no backlight is needed. Therefore, light-emitting elements are thought to be suitable as flat panel display elements. Further, such a light-emitting element also has advantages in that the element can be formed to be thin and lightweight and that response speed is very high. Further, since this type of light-emitting element can be formed to have a film shape, surface light emission can be easily obtained. This feature is difficult to realize with point light sources typified by a filament lamp and an LED or with linear light sources typified by a fluorescent light. Therefore, such light-emitting elements also have a high utility value as a surface light source that can be applied to lighting or the like. Light-emitting elements using electroluminescence are broadly classified according to whether their light-emitting substance is an organic compound or an inorganic compound. When an organic compound is used as a light-emitting substance, by application of a voltage to a light-emitting element, electrons and holes are injected from a pair of electrodes into a layer including a light-emitting organic compound, so that a current flows. Accordingly, the carriers (electrons and holes) are recombined, and thus, the light-emitting organic compound is excited. The light-emitting organic compound returns to a ground state, thereby emitting light. Because of such a mechanism, the light-emitting element is called a current-excitation light-emitting element. Note that an excited state of an organic compound can be of two types: a singlet excited state and a triplet excited state, and luminescence from the singlet excited state (S*) is referred to as fluorescence, and luminescence from the triplet excited state (T*) is referred to as phosphorescence. Furthermore, it is thought that the ratio of S* to T* in a light-emitting element is statistically 1:3. At room temperature, a compound that converts a singlet excited state into luminescence (hereinafter referred to as a fluorescent compound) exhibits only luminescence from the singlet excited state (fluorescence), not luminescence from the triplet excited state (phosphorescence). Therefore, the internal quantum efficiency (ratio of generated photons to injected carriers) of a light-emitting element using a fluorescent compound is thought to have a theoretical limit of 25% on the basis that S*:T*=1:3. In contrast, by using a compound that converts a triplet excited state into luminescence (hereinafter referred to as a phosphorescent compound), an internal quantum efficiency of 75% to 100% can theoretically be achieved. That is, emission efficiency can be three to four times as high as that of a fluorescent compound. From such a reason, in order to achieve a light-emitting element with high efficiency, a light-emitting element using a phosphorescent compound has been actively developed recently (e.g., see Non Patent Document 1). When a light-emitting layer of a light-emitting element is formed using a phosphorescent compound as described above, in order to suppress concentration quenching of the phosphorescent compound or quenching due to triplet-triplet annihilation, the light-emitting layer is often formed so that the phosphorescent compound is dispersed in a matrix including another substance. In that case, a substance serving as a matrix is referred to as a host material, and a substance that is dispersed in a matrix, such as a phosphorescent compound, is referred to as a guest material. When a phosphorescent compound is used as a guest material, a host material is needed to have triplet excitation energy (an energy difference between a ground state and a triplet excited state) higher than the phosphorescent compound. It is known that CBP, which is used as a host material in Non-Patent Document 1, has higher triplet excitation energy than a phosphorescent compound which exhibits emission of green to red light, and is widely used as a host material in the phosphorescent compound. However, although CBP has high triplet excitation energy, it is poor in ability to receive holes or electrons; therefore, there is a problem in that driving voltage of the light-emitting element gets higher. Therefore, a substance that has high triplet excitation energy and also can easily accept or transport both holes and electrons (i.e. a bipolar substance) is required as a host material for a phosphorescent compound. Furthermore, because singlet excitation energy (an energy difference between a ground state and a singlet excited state) is greater than triplet excitation energy, a material that has high triplet excitation energy will also have high singlet excitation energy. Consequently, a substance that has high triplet excitation energy and a bipolar property is also useful in a light-emitting element formed using a fluorescent compound as a light-emitting substance. [Reference] [Non-Patent Document] [Non-Patent Document 1]M. A. Baldo, and four others, Applied Physics Letters, vol. 75, No. 1, pp. 4-6, 1999 SUMMARY OF THE INVENTION It is an object of an embodiment of the present invention to provide a novel derivative with a heteroaromatic ring as a substance having high excitation energy, in particular, a substance having high triplet excitation energy. It is another object of an embodiment of the present invention to provide a novel derivative with a heteroaromatic ring having a bipolar property. It is still another object of an embodiment of the present invention to improve element characteristics of a light-emitting element by application of a novel derivative with a heteroaromatic ring to a light-emitting element. Further, it is another object of an embodiment of the present invention to provide a light-emitting device, an electronic device, and a lighting device each having low power consumption and low driving voltage. One embodiment of the present invention is a derivative with a heteroaromatic ring represented by General Formula (G1) below. In General Formula (G1), R11 to R20 are independently a hydrogen atom, an alkyl group having 1 to 4 carbon atoms, or a substituted or unsubstituted aryl group having 6 to 10 carbon atoms in a ring. When R11 to R20 each have a substituent, an alkyl group having 1 to 4 carbon atoms or an aryl group having 6 to 10 carbon atoms in a ring can be independently given as an example of the substituent. J represents a substituted or unsubstituted arylene group having 6 to 12 carbon atoms. When J has a substituent, an alkyl group having 1 to 4 carbon atoms can be given as an example of the substituent. Note that α and β may be bonded to each other to form a carbazole skeleton. Het is a substituent represented by General Formula (S1-1) or (S1-2) below. In General Formula (S1-1), Ar1 and Ar2 are independently a substituted or unsubstituted aryl group having 6 to 10 carbon atoms in a ring. When Ar1 and Ar2 each have a substituent, an alkyl group having 1 to 4 carbon atoms or an aryl group having 6 to 10 carbon atoms in a ring can be independently given as an example of the substituent. In General Formula (S1-2), Ar3 and Ar4 are independently a substituted or unsubstituted aryl group having 6 to 10 carbon atoms in a ring. R1 is a hydrogen atom, an alkyl group having 1 to 4 carbon atoms, or an aryl group having 6 to 10 carbon atoms in a ring. When Ar3 and Ar4 each have a substituent, an alkyl group having 1 to 4 carbon atoms or an aryl group having 6 to 10 carbon atoms in a ring can be independently given as an example of the substituent. Further, another embodiment of the present invention is a derivative with a heteroaromatic ring represented by General Formula (G2) below. In General Formula (G2), R11 to R20 are independently a hydrogen atom, an alkyl group having 1 to 4 carbon atoms, or a substituted or unsubstituted aryl group having 6 to 10 carbon atoms in a ring. When R11 to R20 each have a substituent, an alkyl group having 1 to 4 carbon atoms or an aryl group having 6 to 10 carbon atoms in a ring can be independently given as an example of the substituent. J represents a substituted or unsubstituted arylene group having 6 to 12 carbon atoms. When J has a substituent, an alkyl group having 1 to 4 carbon atoms can be given as an example of the substituent. Note that α and β may be bonded to each other to form a carbazole skeleton. Het is a substituent represented by General Formula (S2-1) or (S2-2) below. In General Formula (S2-1), R21 to R30 are independently a hydrogen atom, an alkyl group having 1 to 4 carbon atoms, or an aryl group having 6 to 10 carbon atoms in a ring. In General Formula (S2-2), R1 and R31 to R40 are independently a hydrogen atom, an alkyl group having 1 to 4 carbon atoms, or an aryl group having 6 to 10 carbon atoms in a ring. Another embodiment of the present invention is a derivative with a heteroaromatic ring represented by General Formula (G3) below. In General Formula (G3), R11 to R20 are independently a hydrogen atom, an alkyl group having 1 to 4 carbon atoms, or a substituted or unsubstituted aryl group having 6 to 10 carbon atoms in a ring. When R11 to R20 each have a substituent, an alkyl group having 1 to 4 carbon atoms or an aryl group having 6 to 10 carbon atoms in a ring can be independently given as an example of the substituent. Note that α and β may be bonded to each other to form a carbazole skeleton. Het is a substituent represented by General Formula (S3-1) or (S3-2) below. In General Formula (S3-1), R21 to R30 are independently a hydrogen atom, an alkyl group having 1 to 4 carbon atoms, or an aryl group having 6 to 10 carbon atoms in a ring. In General Formula (S3-2), R1 and R31 to R40 are independently a hydrogen atom, an alkyl group having 1 to 4 carbon atoms, or an aryl group having 6 to 10 carbon atoms in a ring. Another embodiment of the present invention is a derivative with a heteroaromatic ring represented by General Formula (G4) below. In General Formula (G4), R11 to R20 are independently a hydrogen atom, an alkyl group having 1 to 4 carbon atoms, or a substituted or unsubstituted aryl group having 6 to 10 carbon atoms in a ring. When R11 to R20 each have a substituent, an alkyl group having 1 to 4 carbon atoms or an aryl group having 6 to 10 carbon atoms in a ring can be independently given as an example of the substituent. Note that α and β may be bonded to each other to form a carbazole skeleton. Bet is a substituent represented by General Formula (S4-1) or (S4-2) below. In General Formula (S4-1), R21 to R30 are independently a hydrogen atom, an alkyl group having 1 to 4 carbon atoms, or an aryl group having 6 to 10 carbon atoms in a ring. In General Formula (S4-2), R1 and R31 to R40 are independently a hydrogen atom, an alkyl group having 1 to 4 carbon atoms, or an aryl group having 6 to 10 carbon atoms in a ring. Another embodiment of the present invention is a derivative with a heteroaromatic ring represented by General Formula (G5) below. In General Formula (G5), R11 to R20 are independently a hydrogen atom, an alkyl group having 1 to 4 carbon atoms, or a substituted or unsubstituted aryl group having 6 to 10 carbon atoms in a ring. When R11 to R20 each have a substituent, an alkyl group having 1 to 4 carbon atoms or an aryl group having 6 to 10 carbon atoms in a ring can be independently given as an example of the substituent. Note that α and β may be bonded to each other to form a carbazole skeleton. Het is a substituent represented by Structural Formula (S5-1) or General Formula (S5-2) below. In General Formula (S5-2), R1 is a hydrogen atom, an alkyl group having 1 to 4 carbon atoms, or an aryl group having 6 to 10 carbon atoms in a ring. Another embodiment of the present invention is a derivative with a heteroaromatic ring represented by General Formula (G6) below. In General Formula (G6), α and β may be bonded to each other to form a carbazole skeleton. Het is a substituent represented by Structural Formula (S6-1) or General Formula (S6-2) below. In General Formula (S6-2), R1 is a hydrogen atom, an alkyl group having 1 to 4 carbon atoms, or an aryl group having 6 to 10 carbon atoms in a ring. Since the above-described derivatives with a heteroaromatic ring according to an embodiment of the present invention have a light-emitting property, as another structure of the present invention, a light-emitting element includes an EL layer between a pair of electrodes, and the EL layer includes any of the above-described derivatives with a heteroaromatic ring. In addition, the derivatives with a heteroaromatic ring according to an embodiment of the present invention have high excitation energy. The derivatives with a heteroaromatic ring can transport both holes and electrons and is thus suitable for a host material of a light-emitting layer included in an EL layer. Accordingly, as another structure of the present invention, a light-emitting element includes an EL layer between a pair of electrodes, and a light-emitting layer included in the EL layer includes any of the above-described derivatives with a heteroaromatic ring and a light-emitting substance. In particular, because the derivatives with a heteroaromatic ring according to an embodiment of the present invention have high triplet excitation energy, a phosphorescent compound is preferable for the light-emitting substance. With such a structure, a light-emitting element that is excellent in emission efficiency and driving voltage can be obtained. Another structure of the present invention is a light-emitting device formed using any of the light-emitting elements described above. Further, another structure of the present invention is an electronic device formed using the light-emitting device according to an embodiment of the present invention. Furthermore, another structure of the present invention is a lighting device formed using the light-emitting device according to an embodiment of the present invention. Further, an embodiment of the present invention includes a light-emitting device including any of the above-described light-emitting elements, and an electronic device and a lighting device each including the light-emitting device. It is to be noted that the “light-emitting device” in this specification refers to an image display device, a light-emitting device, or a light source (including a lighting device). Further, the light-emitting device includes any of the following modules in its category: a module in which a connector such as a flexible printed circuit (FPC), a tape automated bonding (TAB) tape, or a tape carrier package (TCP) is attached to a light-emitting device; a module having a TAB tape or a TCP provided with a printed wiring board at the end thereof; and a module having an integrated circuit (IC) directly mounted over a light-emitting element by a chip on glass (COG) method. According to an embodiment of the present invention, a derivative with a heteroaromatic ring having high excitation energy, in particular, high triplet excitation energy can be obtained. In addition, a derivative with a heteroaromatic ring having a bipolar property of one embodiment of the present invention can be obtained. By forming a light-emitting element using a derivative with a heteroaromatic ring according to an embodiment of the present invention, a light-emitting element with high current efficiency can be formed. Further, by using a light-emitting element according to an embodiment of the present invention, a light-emitting device and an electronic device each having low power consumption and low driving voltage can be obtained. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 illustrates a light-emitting element. FIG. 2 illustrates a light-emitting element. FIG. 3 illustrates a light-emitting element. FIGS. 4A to 4D illustrate a passive-matrix light-emitting device. FIG. 5 illustrates a passive-matrix light-emitting device. FIGS. 6A and 6B illustrate an active-matrix light-emitting device. FIGS. 7A to 7E each illustrate an electronic device. FIG. 8 illustrates lighting devices. FIG. 9 illustrates a light-emitting element. FIGS. 10A and 10B show NMR charts of CzTAZ(1H) (abbreviation). FIGS. 11A and 11B each show an absorption spectrum and an emission spectrum of CzTAZ(1H) (abbreviation). FIGS. 12A and 12B show NMR charts of CzPz (abbreviation). FIGS. 13A and 13B each show an absorption spectrum and an emission spectrum of CzPz (abbreviation). FIG. 14 shows current density-luminance characteristics of Light-Emitting Element 1. FIG. 15 shows voltage-luminance characteristics of Light-Emitting Element 1. FIG. 16 shows luminance-current efficiency characteristics of Light-Emitting Element 1. FIG. 17 shows an emission spectrum of Light-Emitting Element 1. FIG. 18 shows current density-luminance characteristics of Light-Emitting Element 2. FIG. 19 shows voltage-luminance characteristics of Light-Emitting Element 2. FIG. 20 shows luminance-current efficiency characteristics of Light-Emitting Element 2. FIG. 21 shows an emission spectrum of Light-Emitting Element 2. FIGS. 22A and 22B show the highest occupied molecular orbital (HOMO) and the lowest unoccupied molecular orbital (LUMO) of CzTAZ(1H) (abbreviation), respectively. FIGS. 23A and 23B show the highest occupied molecular orbital (HOMO) and the lowest unoccupied molecular orbital (LUMO) of CzPz (abbreviation), respectively. DETAILED DESCRIPTION OF THE INVENTION Hereinafter, Embodiments of the present invention will be described with reference to the drawings. Note that the present invention is not limited to the following description, and modes and details thereof can be modified in various ways without departing from the spirit and the scope of the present invention. Therefore, the invention should not be construed as being limited to the description in the following embodiment modes. Embodiment 1 In this embodiment, a derivative with a heteroaromatic ring according to an embodiment of the present invention is described. A derivative with a heteroaromatic ring according to an embodiment of the present invention is represented by General Formula (G1). In General Formula (G1), R11 to R20 are independently a hydrogen atom, an alkyl group having 1 to 4 carbon atoms, or a substituted or unsubstituted aryl group having 6 to 10 carbon atoms in a ring. When R11 to R20 each have a substituent, an alkyl group having 1 to 4 carbon atoms or an aryl group having 6 to 10 carbon atoms in a ring can be independently given as an example of the substituent. J represents a substituted or unsubstituted arylene group having 6 to 12 carbon atoms. When J has a substituent, an alkyl group having 1 to 4 carbon atoms can be given as an example of the substituent. Note that α and β may be bonded to each other to form a carbazole skeleton. Het is a substituent represented by General Formula (S1-1) or (S1-2) below. In General Formula (S1-1), Ar1 and Ar2 are independently a substituted or unsubstituted aryl group having 6 to 10 carbon atoms in a ring. When Ar1 and Ar2 each have a substituent, an alkyl group having 1 to 4 carbon atoms or an aryl group having 6 to 10 carbon atoms in a ring can be independently given as an example of the substituent. In General Formula (S1-2), Ar3 and Ar4 are independently a substituted or unsubstituted aryl group having 6 to 10 carbon atoms in a ring. R1 is a hydrogen atom, an alkyl group having 1 to 4 carbon atoms, or an aryl group having 6 to 10 carbon atoms in a ring. When Ar3 and Ar4 each have a substituent, an alkyl group having 1 to 4 carbon atoms or an aryl group having 6 to 10 carbon atoms in a ring can be independently given as an example of the substituent. A derivative with a heteroaromatic ring according to an embodiment of the present invention is represented by General Formula (G2). In General Formula (G2), R11 to R20 are independently a hydrogen atom, an alkyl group having 1 to 4 carbon atoms, or a substituted or unsubstituted aryl group having 6 to 10 carbon atoms in a ring. When R11 to R20 each have a substituent, an alkyl group having 1 to 4 carbon atoms or an aryl group having 6 to 10 carbon atoms in a ring can be independently given as an example of the substituent. J represents a substituted or unsubstituted arylene group having 6 to 12 carbon atoms. When J has a substituent, an alkyl group having 1 to 4 carbon atoms can be given as an example of the substituent. Note that α and β may be bonded to each other to form a carbazole skeleton. Het is a substituent represented by General Formula (S2-1) or (S2-2) below. In General Formula (S2-1). R21 to R30 are independently a hydrogen atom, an alkyl group having 1 to 4 carbon atoms, or an aryl group having 6 to 10 carbon atoms in a ring. In General Formula (S2-2), R1 and R31 to R40 are independently a hydrogen atom, an alkyl group having 1 to 4 carbon atoms, or an aryl group having 6 to 10 carbon atoms in a ring. A derivative with a heteroaromatic ring according to an embodiment of the present invention is represented by General Formula (G3). In General Formula (G3), R11 to R20 are independently a hydrogen atom, an alkyl group having 1 to 4 carbon atoms, or a substituted or unsubstituted aryl group having 6 to 10 carbon atoms in a ring. When R11 to R20 each have a substituent, an alkyl group having 1 to 4 carbon atoms or an aryl group having 6 to 10 carbon atoms in a ring can be independently given as an example of the substituent. Note that α and β may be bonded to each other to form a carbazole skeleton. Het is a substituent represented by General Formula (S3-1) or (S3-2) below. In General Formula (S3-1), R21 to R30 are independently a hydrogen atom, an alkyl group having 1 to 4 carbon atoms, or an aryl group having 6 to 10 carbon atoms in a ring. In General Formula (S3-2), R1 and R31 to R40 are independently a hydrogen atom, an alkyl group having 1 to 4 carbon atoms, or an aryl group having 6 to 10 carbon atoms in a ring. A derivative with a heteroaromatic ring according to an embodiment of the present invention is represented by General Formula (G4). In General Formula (G4), R11 to R20 are independently a hydrogen atom, an alkyl group having 1 to 4 carbon atoms, or a substituted or unsubstituted aryl group having 6 to 10 carbon atoms in a ring. When R11 to R20 each have a substituent, an alkyl group having 1 to 4 carbon atoms or an aryl group having 6 to 10 carbon atoms in a ring can be independently given as an example of the substituent. Note that α and β may be bonded to each other to form a carbazole skeleton. Het is a substituent represented by General Formula (S4-1) or (S4-2) below. In General Formula (S4-1), R21 to R30 are independently a hydrogen atom, an alkyl group having 1 to 4 carbon atoms, or an aryl group having 6 to 10 carbon atoms in a ring. In General Formula (S4-2), R1 and R31 to R40 are independently a hydrogen atom, an alkyl group having 1 to 4 carbon atoms, or an aryl group having 6 to 10 carbon atoms in a ring. A derivative with a heteroaromatic ring according to an embodiment of the present invention is represented by General Formula (G5). In General Formula (G5), R11 to R20 are independently a hydrogen atom, an alkyl group having 1 to 4 carbon atoms, or a substituted or unsubstituted aryl group having 6 to 10 carbon atoms in a ring. When R11 to R20 each have a substituent, an alkyl group having 1 to 4 carbon atoms or an aryl group having 6 to 10 carbon atoms in a ring can be independently given as an example of the substituent. Note that α and β may be bonded to each other to form a carbazole skeleton. Het is a substituent represented by Structural Formula (S5-1) or General Formula (S5-2) below. In General Formula (S5-2), R1 is a hydrogen atom, an alkyl group having 1 to 4 carbon atoms, or an aryl group having 6 to 10 carbon atoms in a ring. A derivative with a heteroaromatic ring according to an embodiment of the present invention is represented by General Formula (G6). In General Formula (G6), α and β may be bonded to each other to form a carbazole skeleton. Het is a substituent represented by Structural Formula (S6-1) or General Formula (S6-2) below. In General Formula (S6-2), R1 is a hydrogen atom, an alkyl group having 1 to 4 carbon atoms, or an aryl group having 6 to 10 carbon atoms in a ring. As specific structures of R11 to R20 in General Formulae (G1) to (G5), for example, substituents represented by Structural Formulae (1-1) to (1-30) can be given. As specific structures of J in General Formulae (G1) and (G2), for example, substituents represented by Structural Formulae (2-1) to (2-20) can be given. In Het of General Formula (G1), as specific structures of Ar1 and Ar2 in General Formula (S1-1) and Ar3 and Ar4 in General Formula (S1-2), for example, substituents represented by Structural Formulae (3-1) to (3-21) can be given. In Het of General Formulae (G1) to (G6), as specific structures of R1 in General Formulae (S1-2) to (S6-2), for example, substituents represented by Structural Formulae (4-1) to (4-22) can be given. In Het of General Formulae (G2) to (G5), as specific structures of R21 to R40 in General Formulae (S2-1) to (S4-1) and (S2-2) to (S4-2), for example, substituents represented by Structural Formulae (5-1) to (5-22) can be given. As specific examples of a derivative with a heteroaromatic ring of the present invention represented by General Formula (G1), derivatives with a heteroaromatic ring represented by Structural Formulae (100) to (275) can be given. However, the present invention is not limited to these. A variety of reactions can be applied to a synthesis method of a derivative with a heteroaromatic ring according to an embodiment of the present invention. For example, the derivative with a heteroaromatic ring according to an embodiment of the present invention represented by General Formula (G1) below can be synthesized by synthesis reactions described below. Note that the synthesis method of a derivative with a heteroaromatic ring according to an embodiment of the present invention is not limited to the following synthesis method. In General Formula (G1), R11 to R20 are independently a hydrogen atom, an alkyl group having 1 to 4 carbon atoms, or a substituted or unsubstituted aryl group having 6 to 10 carbon atoms in a ring. When R11 to R20 each have a substituent, an alkyl group having 1 to 4 carbon atoms or an aryl group having 6 to 10 carbon atoms in a ring can be independently given as an example of the substituent. J represents a substituted or unsubstituted arylene group having 6 to 12 carbon atoms in a ring. When J has a substituent, an alkyl group having 1 to 4 carbon atoms can be given as an example of the substituent. Note that α and β may be bonded to each other to form a carbazole skeleton. Het is a substituent represented by General Formula (S1-1) or (S1-2) below. In General Formula (S1-1), Ar1 and Ar2 are independently a substituted or unsubstituted aryl group having 6 to 10 carbon atoms in a ring. When Ar1 and Ar2 each have a substituent, an alkyl group having 1 to 4 carbon atoms or an aryl group having 6 to 10 carbon atoms in a ring can be independently given as an example of the substituent. In General Formula (S1-2), Ar3 and Ar4 are independently a substituted or unsubstituted aryl group having 6 to 10 carbon atoms in a ring. R1 is a hydrogen atom, an alkyl group having 1 to 4 carbon atoms, or an aryl group having 6 to 10 carbon atoms in a ring. When Ar3 and Ar4 each have a substituent, an alkyl group having 1 to 4 carbon atoms or an aryl group having 6 to 10 carbon atoms in a ring can be independently given as an example of the substituent. <Synthesis method of Compound represented by General Formula (G1)> The derivative with a heteroaromatic ring represented by General Formula (G1) can be synthesized as shown in the following Reaction Scheme 1. That is, a halogenated compound with a heteroaromatic ring (Compound A1) and an amine compound (Compound A2) are coupled in the presence of a base by a Buchwald-Hartwig reaction using a palladium catalyst or by an Ullmann reaction using copper or a copper compound, so that the derivative with a heteroaromatic ring (General Formula (G1)) can be obtained. In Reaction Scheme 1, X1 represents a halogen or a triflate group, and iodine or bromine can be used as the halogen. In General Formula (G1), R11 to R20 are independently a hydrogen atom, an alkyl group having 1 to 4 carbon atoms, or a substituted or unsubstituted aryl group having 6 to 10 carbon atoms in a ring. When R11 to R20 each have a substituent, an alkyl group having 1 to 4 carbon atoms or an aryl group having 6 to 10 carbon atoms in a ring can be independently given as an example of the substituent. J represents a substituted or unsubstituted arylene group having 6 to 12 carbon atoms in a ring. When J has a substituent, an alkyl group having 1 to 4 carbon atoms can be given as an example of the substituent. Note that α and β may be bonded to each other to form a carbazole skeleton. Het is a substituent represented by General Formula (S1-1) or (S1-2) below. In General Formula (S1-1), Ar1 and Ar2 are independently a substituted or unsubstituted aryl group having 6 to 10 carbon atoms in a ring. When Ar1 and Ar2 each have a substituent, an alkyl group having 1 to 4 carbon atoms or an aryl group having 6 to 10 carbon atoms in a ring can be independently given as an example of the substituent. In General Formula (S1-2), Ar3 and Ar4 are independently a substituted or unsubstituted aryl group having 6 to 10 carbon atoms in a ring. R1 is a hydrogen atom, an alkyl group having 1 to 4 carbon atoms, or an aryl group having 6 to 10 carbon atoms in a ring. When Ar3 and Ar4 each have a substituent, an alkyl group having 1 to 4 carbon atoms or an aryl group having 6 to 10 carbon atoms in a ring can be independently given as an example of the substituent. In the case where the Buchwald-Hartwig reaction is carried out in Reaction Scheme 1, bis(dibenzylideneacetone)palladium(0), palladium(II) acetate, or the like can be used as the palladium catalyst. Examples of ligands of the palladium catalyst which can be used in Reaction Scheme 1 are tri(tert-butyl)phosphine, tri(n-hexyl)phosphine, tricyclohexylphosphine, and the like. Examples of bases which can be used in Reaction Scheme 1 are organic bases such as sodium tert-butoxide, inorganic bases such as potassium carbonate, and the like. Examples of solvents which can be used in Reaction Scheme 1 are toluene, xylene, benzene, tetrahydrofuran, and the like. The case of performing the Ullmann reaction in Reaction Scheme 1 is described. In Reaction Scheme 1, copper(I) iodide, copper(II) acetate, or the like can be used as the copper compound. Further, copper can be used other than the copper compound. An example of a base which can be used in Reaction Scheme 1 is an inorganic base such as potassium carbonate. Examples of solvents which can be used in Reaction Scheme 1 are 1,3-dimethyl-3,4,5,6-tetrahydro-2(1H)pyrimidinone (DMPU), toluene, xylene, benzene, and the like. In the Ullmann reaction, the target substance can be obtained in a shorter time and in a higher yield when the reaction temperature is 100° C. or higher; therefore, it is preferable to use DMPU or xylene that has a high boiling point. Because the reaction temperature is further preferably 150° C. or higher, DMPU is more preferably used. Embodiment 2 In this embodiment, an example of a light-emitting element in which any of the derivatives with a heteroaromatic ring described in the above embodiment is used for a light-emitting layer is described with reference to drawings. FIG. 1 shows an example of a light-emitting element in which an EL layer 102 including a light-emitting layer 113 is interposed between a first electrode 101 and a second electrode 103. By application of a voltage to such a light-emitting element, holes injected from the first electrode 101 side and electrons injected from the second electrode 103 side recombine in the light-emitting layer 113 to bring a light-emitting organic compound into an excited state. Light is emitted when the light-emitting organic compound in the excited state returns to the ground state. Note that in the light-emitting element described in this embodiment, the first electrode 101 functions as an anode and the second electrode 103 functions as a cathode. It is needless to say that the order of stacking layers in the structure illustrated in FIG. 1 may be reversed. The first electrode 101 functioning as an anode is preferably formed using a metal, an alloy, an electrically conductive compound, a mixture thereof, or the like each having a high work function (specifically, a work function of 4.0 eV or higher). Specifically, for example, indium tin oxide (ITO), indium tin oxide containing silicon or silicon oxide, indium zinc oxide (IZO), indium oxide containing tungsten oxide and zinc oxide, and the like can be given. Other than the above, gold (Au), platinum (Pt), nickel (Ni), tungsten (W), chromium (Cr), molybdenum (Mo), iron (Fe), cobalt (Co), copper (Cu), palladium (Pd), titanium (Ti), or the like may be used. Note that in the case where in the EL layer 102, a layer in contact with the first electrode 101 is formed using a composite material of an organic compound and an electron acceptor (acceptor), a substance used for the first electrode 101 can be selected without being limited by the work function. For example, aluminum (Al), silver (Ag), an alloy containing aluminum (e.g., Al—Si), or the like can be used. Note that the first electrode 101 can be formed by, for example, a sputtering method, an evaporation method (including a vacuum evaporation method), or the like. The EL layer 102 formed over the first electrode 101 includes at least the light-emitting layer 113 and includes any of the derivatives with a heteroaromatic ring described in the above embodiment. For part of the EL layer 102, a known substance can be used, and either a low molecular compound or a high molecular compound may be used. Note that the substance used for forming the EL layer 102 may contain an inorganic compound in part. Further, as illustrated in FIG. 1, the EL layer 102 includes the light-emitting layer 113 and also the following layers stacked in appropriate combination: a hole-injection layer 111 including a substance having a high hole-injection property, a hole-transport layer 112 including a substance having a high hole-transport property, an electron-transport layer 114 including a substance having a high electron-transport property, an electron-injection layer 115 including a substance having a high electron-injection property, and the like. The hole-injection layer 111 includes a substance having a high hole-injection property. As the substance having a high hole-injection property, a metal oxide such as molybdenum oxide, titanium oxide, vanadium oxide, rhenium oxide, ruthenium oxide, chromium oxide, zirconium oxide, hafnium oxide, tantalum oxide, silver oxide, tungsten oxide, or manganese oxide can be used. Alternatively, a phthalocyanine-based compound such as phthalocyanine (abbreviation: H2Pc), copper(II) phthalocyanine (abbreviation: CuPc), or vanadyl phthalocyanine (abbreviation: VOPc) can be used. Further, as examples of low molecular organic compounds, any of the following aromatic amine compounds can be used: 4,4′,4″-tris(N,N-diphenylamino)triphenylamine (abbreviation: TDATA), 4,4′,4″-tris[N-(3-methylphenyl)-N-phenylamino]triphenylamine (abbreviation: MTDATA), 4,4′-bis[N-(4-diphenylaminophenyl)-N-phenylamino]biphenyl (abbreviation: DPAB), 4,4′-bis(N-{4-[N′-(3-methylphenyl)-N′-phenylamino]phenyl}-N-phenylamino)biphenyl (abbreviation: DNTPD), 1,3,5-tris[N-(4-diphenylaminophenyl)-N-phenylamino]benzene (abbreviation: DPA3B), 3-[N-(9-phenyl carbazol-3-yl)-N-phenylamino]-9-phenylcarbazole (abbreviation: PCzPCA1), 3,6-bis[N-(9-phenylcarbazol-3-yl)-N-phenylamino]-9-phenylcarbazole (abbreviation: PCzPCA2), and 3-[N-(1-naphthyl)-N-(9-phenylcarbazol-3-yl)amino]-9-phenylcarbazole (abbreviation: PCzPCN1), and the like. Further alternatively, any of high molecular compounds (e.g., oligomers, dendrimers, or polymers) can be used. For example, any of the following high molecular compounds can be used: poly(N-vinylcarbazole) (abbreviation: PVK), poly(4-vinyltriphenylamine) (abbreviation: PVTPA), poly[N-(4-{N′-[4-(4-diphenylamino)phenyl]phenyl-N′-phenylamino}phenyl)methacrylamide] (abbreviation: PTPDMA), and poly[N,N′-bis(4-butylphenyl)-N,N′-bis(phenyl)benzidine] (abbreviation: Poly-TPD). Alternatively, a high molecular compound to which acid is added, such as poly(3,4-ethylenedioxythiophene)/poly(styrenesulfonic acid) (PEDOT/PSS), or polyaniline/poly(styrenesulfonic acid) (PAni/PSS), can be used. Alternatively, for the hole-injection layer 111, a composite material formed by combining an organic compound and an electron acceptor (acceptor) may be used. Such a composite material has excellent hole-injection and hole-transport properties because the electron acceptor generates holes in the organic compound. In this case, as the organic compound, a material that is excellent in transport of the generated holes (a substance having a high hole-transport property) is preferably used. Note that an organic compound used for the above composite material preferably has a high hole-transport property. Specifically, a substance having a hole mobility of 10−6 cm2/Vs or more is preferably used. Further, this organic compound is not to be construed as being limited to such substances as long as it has a higher hole-transport property than an electron-transport property. Examples of the organic compound which can be used for the composite material are specifically given below. Examples of the organic compounds that can be used for the composite material include aromatic amine compounds such as TDATA, MTDATA, DPAB, DNTPD, DPA3B, PCzPCA1, PCzPCA2, PCzPCN1, 4,4′-bis[N-(1-naphthyl)-N-phenylamino]biphenyl (abbreviation: NPB), and s(3-methylphenyl)-N,N′-diphenyl-[1,1′-biphenyl]-4,4′-diamine (abbreviation: TPD) and carbazole derivatives such as 4,4′-di(N-carbazolyl)biphenyl (abbreviation: CBP), 1,3,5-tris[4-(N-carbazolyl)phenyl]benzene (abbreviation: TCPB), 9-[4-(N-carbazolyl)]phenyl-10-phenylanthracene (abbreviation: CzPA), and 1,4-bis[4-(N-carbazolyl)phenyl-2,3,5,6-tetraphenylbenzene. Any of the following aromatic hydrocarbon compounds may be used: 2-tert-butyl-9,10-di(2-naphthyl)anthracene (abbreviation: t-BuDNA), 2-tent-butyl-9,10-di(1-naphthyl)anthracene, 9,10-bis(3,5-diphenylphenyl)anthracene (abbreviation: DPPA), 2-tert-butyl-9,10-bis(4-phenylphenyl)anthracene (abbreviation: t-BuDBA), 9,10-di(2-naphthyl)anthracene (abbreviation: DNA), 9,10-diphenylanthracene (abbreviation: DPAnth), 2-tert-butylanthracene (abbreviation: t-BuAnth), 9,10-bis(4-methyl-1-naphthyl)anthracene (abbreviation: DMNA), 9,10-bis[2-(1-naphthyl)phenyl)-2-tert-butyl-anthracene, 9,10-bis[2-(1-naphthyl)phenyl]anthracene, and 2,3,6,7-tetramethyl-9,10-di(1-naphthyl)anthracene. Any of the following aromatic hydrocarbon compounds may also be used: 2,3,6,7-tetramethyl-9,10-di(2-naphthyl)anthracene, 9,9′-bianthryl, 10,10′-diphenyl-9,9′-bianthryl, 10,10′-bis(2-phenylphenyl)-9,9′-bianthryl, 10,10′-bis[(2,3,4,5,6-pentaphenyl)phenyl]-9,9′-bianthryl, anthracene, tetracene, rubrene, perylene, 2,5,8,11-tetra(tert-butyl)perylene, pentacene, coronene, 4,4′-bis(2,2-diphenylvinyl)biphenyl (abbreviation: DPVBi), and 9,10-bis[4-(2,2-diphenylvinyl)phenyl]anthracene (abbreviation: DPVPA). Further, a derivative with a heteroaromatic ring according to an embodiment of the present invention may be used. As examples of electron acceptors that can be used for the composite material, there are organic compounds such as 7,7,8,8-tetracyano-2,3,5,6-tetrafluoroquinodimethane (abbreviation: F4-TCNQ) and chloranil, transition metal oxides, and the like. Oxides of metals belonging to Group 4 to Group 8 of the periodic table may be used. For example, vanadium oxide, niobium oxide, tantalum oxide, chromium oxide, molybdenum oxide, tungsten oxide, manganese oxide, and rhenium oxide are suitable because of their high electron-accepting properties. Among these, molybdenum oxide is suitable because it is stable in air and its hygroscopic property is low so that it can be easily handled. Note that a composite material formed using any of the above-mentioned high molecular compounds such as PVK, PVTPA, PTPDMA, and Poly-TPD and any of the above-mentioned electron acceptors may be used for the hole-injection layer 111. The hole-transport layer 112 includes a substance having a high hole-transport property. As a substance having a high hole-transport property, there are aromatic amine compounds such as NPB, TPD, 4,4′-bis[N-(9,9-dimethylfluoren-2-yl)-N-phenylamino]biphenyl (abbreviation: DFLDPBi), and 4,4′-bis[N-(spiro-9,9′-bifluoren-2-yl)-N-phenylamino]biphenyl (abbreviation: BSPB). The substances mentioned here are mainly substances having a hole mobility of 10−6 cm2/Vs or more. Note that the hole-transport layer 112 may have a single-layer structure or a stacked-layer structure. Alternatively, for the hole-transport layer 112, a high molecular compound such as PVK, PVTPA, PTPDMA, or Poly-TPD can be used. Further alternatively, any of the derivatives with a heteroaromatic ring according to an embodiment of the present invention can be used as a hole-transport material because of a bipolar property and a hole-transport property. The light-emitting layer 113 includes a substance having a high light-emitting property. Note that in this embodiment, description is given of the case in which any of the derivatives with a heteroaromatic ring described in the above embodiment is used for the light-emitting layer. The above derivatives with a heteroaromatic ring are suitably used as a host material in a light-emitting layer where a substance having a high light-emitting property (a guest material) is dispersed in another substance (a host material). However, an embodiment of the disclosed invention is not to be construed as being limited to this structure. Any of the above derivatives with a heteroaromatic ring may be used alone as the light-emitting layer. In the case where any of the derivatives with a heteroaromatic ring described in the above embodiment is used as a host material and a material that emits fluorescence is used as a guest material, it is preferable to use, as the guest material, a material whose lowest unoccupied molecular orbital (LUMO) level is lower and whose highest occupied molecular orbital (HOMO) level is higher than those of the derivative with a heteroaromatic ring described in the above embodiment. Examples of materials for blue light emission include N,N-bis[4-(9H-carbazol-9-yl)phenyl]-N,N′-diphenylstilbene-4,4′-diamine (abbreviation: YGA2S),4-(9H-carbazol-9-yl)-4′-(10-phenyl-9-anthryl)triphenylamine (abbreviation: YGAPA), and the like. In addition, examples of materials for green light emission include N-(9,10-diphenyl-2-anthryl)-N,9-diphenyl-9H-carbazol-3-amine (abbreviation: 2PCAPA), [9,10-bis(1,1′-biphenyl-2-yl)-2-anthryl]-N,9-diphenyl-9H-carbazol-3-amine (abbreviation: 2PCABPhA), N-(9,10-diphenyl-2-anthryl)-N,N′,N′-triphenyl-1,4-phenylenediamine (abbreviation: 2DPAPA), N-[9,10-bis(1,1′-biphenyl-2-yl)-2-anthryl]-N,N′,N′-triphenyl-1,4-phenylenediamine (abbreviation: 2DPABPhA), N-[9,10-bis(1,1′-biphenyl-2-yl)]-N-[4-(9H-carbazol-9-yl)phenyl]-N-phenylanthracen-2-amine (abbreviation: 2YGABPhA), N,N,9-triphenylanthracen-9-amine (abbreviation: DPhAPhA), and the like. Further, examples of materials for yellow light emission include rubrene, 5,12-bis(1,1′-biphenyl-4-yl)-6,11-diphenyltetracene (abbreviation: BPT), and the like. Furthermore, examples of materials for red light emission include N,N,N′,N′-tetrakis(4-methylphenyl)tetracene-5,11-diamine (abbreviation: p-mPhTD), 7,14-diphenyl-N,N,N′,N′-tetrakis(4-methylphenyl)acenaphtho[1,2-a]fluoranthene-3,10-diamine (abbreviation: p-mPhAFD), and the like. Alternatively, in the case where any of the derivatives with a heteroaromatic ring described in the above embodiment is used as a host material and a material that emits phosphorescence is used as a guest material, it is preferable to use, as the guest material, a material having lower triplet excitation energy than the derivative with a heteroaromatic ring described in the above embodiment. Examples of such materials include organometallic complexes such as bis[2-(4′,6′-difluorophenyl)pyridinato-N,C2]iridium(III) tetrakis(1-pyrazolyl)borate (abbreviation: FIr6), bis[2-(4′,6′-difluorophenyl)pyridinato-N,C2′]iridium(III)picolinate (abbreviation: FIrpic), bis[2-(3′,5′-bistrifluoromethylphenyl)pyridinato-N,C2′]iridium(III) picolinate (abbreviation: Ir(CF3ppy)2(pic)), bis[2-(4′,6′-difluorophenyl)pyridinato-N,C2′]iridium(III) acetylacetonate (abbreviation: FIracac), tris(2-phenylpyridinato-N,C2′)iridium(III) (abbreviation: Ir(ppy)3), bis(2-phenylpyridinato)iridium(III) acetylacetonato (abbreviation: Ir(ppy)2(acac)), tris(acetylacetonato)(monophenanthroline)terbium(III) (abbreviation: Tb(acac)3(Phen)), bis(benzo[h]quinolinato)iridium(III)acetylacetonate (abbreviation: Ir(bzq)2(acac)), bis(2,4-diphenyl-1,3-oxazolato-N,C2′)iridium(III) acetylacetonate (abbreviation: Ir(dpo)2(acac)), bis[2-(4′-perfluorophenylphenyl)pyridinato]iridium(III)acetylacetonate (abbreviation: Ir(p-PF-ph)2(acac)), bis(2-phenylbenzothiazolato-N,C2′)iridium(III) acetylacetonate (abbreviation: Ir(bt)2(acac)), bis[2-(2′-benzo[4,5-α]thienyl)pyridinato-N,C3′]iridium(III) acetylacetonate (abbreviation: Ir(btp)2(acac)), bis(1-phenylisoquinolinato-N,C2′)iridium(III) acetylacetonate (abbreviation: Ir(piq)2(acac)), (acetylacetonato)bis[2,3-bis(4-fluorophenyl)quinoxalinato]iridium(III) (abbreviation: Ir(Fdpq)2(acac)), (acetylacetonato)bis(2,3,5-triphenylpyrazinato)iridium(III) (abbreviation: Ir(tppr)2(acac)), 2,3,7,8,12,13,17,18-octaethyl-21H,23H-porphyrin platinum(II) (abbreviation: PtOEP), tris(1,3-diphenyl-1,3-propanedionato)(monophenanthroline)europium(III) (abbreviation: Eu(DBM)3(Phen)), and tris[1-(2-thenoyl)-3,3,3-trifluoroacetonato](monophenanthroline)europium(III) (abbreviation: Eu(TTA)3(Phen)). Since the derivatives with a heteroaromatic ring described in the above embodiment have an electron-transport property, by using any of them for a light-emitting layer, a light-emitting layer having a high electron-transport property can be obtained. Such a light-emitting layer can emit light with high efficiency when a guest material having a high electron-trapping property is used. in addition, as a substance (a host material) in which a light-emitting substance (a guest material) is dispersed, plural kinds of substances can be used. Therefore, the light-emitting layer may include a second host material in addition to the derivatives with a heteroaromatic ring described in the above embodiment. Further, as a light-emitting substance, any of the derivatives with a heteroaromatic ring according to an embodiment of the present invention can be used alone or as a guest material. The electron-transport layer 114 includes a substance having a high electron-transport property. For the electron-transport layer 114, it is possible to use a metal complex such as Alq3, tris(4-methyl-8-quinolinolato)aluminum (abbreviation: Almq3), bis(10-hydroxybenzo[h]quinolinato)beryllium (abbreviation: BeBq2), BAlq, Zn(BOX)2, or bis[2-(2′-hydroxyphenyl)benzothiazolato]zinc(II) (abbreviation: Zn(BTZ)2). Alternatively, it is possible to use a heteroaromatic compound such as 2-(4-biphenylyl)-5-(4-tert-butylphenyl)-1,3,4-oxadiazole (abbreviation: PBD), 1,3-bis[5-(p-tert-butylphenyl)-1,3,4-oxadiazole-2-yl]benzene (abbreviation: OXD-7), 3-(4-tert-butylphenyl)-4-phenyl-5-(4-biphenylyl)-1,2,4-triazole (abbreviation: TAZ), 3-(4-tert-butyl-phenyl)-4-(4-ethylphenyl)-5-(4-biphenylyl)-1,2,4-triazole (abbreviation: p-EtTAZ), bathophenanthroline (abbreviation: BPhen), bathocuproine (abbreviation: BCP), or 4,4′-bis(5-methylbenzoxazole-2-yl)stilbene (abbreviation: BzOs). Further alternatively, a high molecular compound such as poly(2,5-pyridinediyl) (abbreviation: PPy), poly[(9,9-dihexylfluorene-2,7-diyl)-co-(pyridine-3,5-diyl)] (abbreviation: PF-Py), or poly[(9,9-dioctylfluorene-2,7-diyl)-co-(2,2%-bipyridine-6,6′-diyl)] (abbreviation: PF-BPy) may be used. The substances described here are mainly substances having electron mobility of 10−6 cm2/Vs or more. In addition, the electron-transport layer 114 may have a single-layer structure or a stacked-layer structure. Any of the above derivatives with a heteroaromatic ring can be used as an electron-transport material because of a bipolar property and an electron-transport property. The electron-injection layer 115 includes a substance having a high electron-injection property. For the electron-injection layer 115, an alkali metal, an alkaline earth metal, or a compound thereof, such as lithium (Li), cesium (Cs), calcium (Ca), lithium fluoride (LiF), cesium fluoride (CsF), calcium fluoride (CaF2), or lithium oxide (LiOx) can be used. Alternatively, a rare earth metal compound such as erbium fluoride (ErF3) can be used. Further alternatively, any of the above-described substances for forming the electron-transport layer 114 may be used. For the electron-injection layer 115, a composite material formed by combining an organic compound and an electron donor (donor) may be used. Such a composite material has excellent an electron-injection and electron-transport properties because the electron donor generates electrons in the organic compound. In this case, as the organic compound, a material that is excellent in transport of the generated electrons is preferably used: for example, any of the above-described substances for forming the electron-transport layer 114 can be used. Alternatively, any of the derivatives with a heteroaromatic ring according to an embodiment of the present invention can be used. As the electron donor, a substance exhibiting an electron-donating property to the organic compound is used. Specifically, it is preferable to use any of alkali metals, alkaline earth metals, or rare earth metals, such as lithium, cesium, magnesium, calcium, erbium, ytterbium, or the like. Alternatively, it is preferable to use any of alkali metal oxides or alkaline earth metal oxides: lithium oxide, calcium oxide, barium oxide, or the like. A Lewis base such as magnesium oxide can also be used. Alternatively, an organic compound such as tetrathiafulvalene (abbreviation: TTF) can be used. Note that the hole-injection layer 111, hole-transport layer 112, light-emitting layer 113, electron-transport layer 114, and electron-injection layer 115 which are described above each can be formed by an evaporation method (including a vacuum evaporation method), an inkjet method, a coating method, or the like. The second electrode 103 functioning as a cathode is preferably formed using a metal, an alloy, an electrically conductive compound, a mixture thereof, or the like which has a low work function (preferably, a work function of 3.8 eV or lower). Specifically, any of the following materials can be used: aluminum, silver, and the like, as well as elements that belong to Group 1 or Group 2 of the periodic table, that is, alkali metals such as lithium and cesium or alkaline earth metals such as magnesium, calcium, and strontium, or alloys thereof; rare earth metals such as europium and ytterbium, or alloys thereof. Note that, when a layer in contact with the second electrode 103 which is included in the EL layer 102 is formed using the above-described composite material of the organic compound and the electron donor (donor), a material used for the second electrode 103 can be selected without being limited by the work function. For example, any of a variety of conductive materials such as Al, Ag, ITO, and indium oxide-tin oxide containing silicon or silicon oxide can be used. In the formation of the second electrode 103, a vacuum evaporation method or a sputtering method can be used. Alternatively, when a silver paste or the like is used, a coating method, an inkjet method, or the like may be used. In the above-described light-emitting element, holes and electrons generated by a potential difference between the first electrode 101 and the second electrode 103 recombine in the EL layer 102, thereby emitting light. Then, this emitted light is extracted out through one of or both the first electrode 101 and the second electrode 103. Accordingly, one of or both
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