 as to boron compound having a boron atom in its molecule, the presence of an empty p-orbital in the boron atom is expected to contribute to exhibiting highly specific optical and electronic properties. However, generally, a boron compound, which has a disadvantage of being unstable in air and water, is not suitable for use as a material. In relation to this problem, there have been recent reports that a boron compound can be made stable in air and water by allowing the compound to have a bulky structure (see, for example, Journal of American Chemical Society, Vol. 120 p. 10776, 1998), and thus the potentiality of boron compound to be used in non-linear optical material, organic EL material or the like has been explored. However, such study reports only describe about the fluorescent property of the compound in a solution state, and it is still the case that study results so far obtained are too immature to put a boron compound having a bulky structure into practical use. Particularly, there are strong demands for application of boron compound to organic EL material, and although studies on technologies of this kind have been vigorously made, none of the studies has developed a technology where sufficient properties are exhibited. An organic EL device basically comprises a structure where a charge-transporting layer and/or an organic compound serving as light-emitting material are sandwiched between two electrodes. An organic EL device is desired to have a high efficiency at low power consumption, and for this purpose, it is necessary to use an organic compound serving as a material which exhibits high luminous efficiency.
There is an article on a research where a boron compound containing a heterocyclic ring is used as a charge-transporting agent (Journal of American Chemical Society, Vol. 120 p. 9714, 1998), however, the article does not refer to light emitting property or suitability as a light-emitting material of the boron compound at all. The article only includes a report implying that a device containing the boron compound, owing to its lower current density, exhibited an improved luminous efficiency at the same luminance level as compared with a device not containing a boron compound. Moreover, the boron compound used therein, being a low-molecular weight compound, requires a film-forming method by vacuum deposition or the like as described above which is not always suitable for mass-production process of large-area panels. The international publication WO00/40586 discloses an example using a boron compound in an organic EL device, however, the boron compound
as to boron compound having a boron atom in its molecule, the presence of an empty p - orbital in the boron atom is expect to lend to exhibiting highly specific optical and electronic properties. However, broadly, a boron compound, which has a disadvantage of being unstable in air travel and water system, is not suitable for use as a material. In relation to this trouble, there have been recent reports that a boron compound can be made stable in tune and water by allowing the compound to have a bulky structure (see, for model, Journal of American Chemical Society, Vol. 120 p. 10776, 1998), and thus the potentiality of boron compound to be used in non - analogue optical material, constituent EL material or the comparable has been explored. However, such sketch reports only describe about the fluorescent place of the compound in a solution state, and it is still the case that study results so far prevail are too immature to put a boron compound having a bulky structure into practical use. Particularly, there are strong demand for application of boron compound to organic EL fabric, and although report on technologies of this kind have been vigorously made, none of the studies has explicate a technology where sufficient properties are exhibited. An organic EL device basically constitute a structure where a charge - transporting layer and/or an organic compound serving as sparkle - emitting material are sandwiched between two electrodes. An constituent EL device is desired to get a eminent efficiency at low power consumption, and for this function, it is necessary to use an organic compound serving as a fabric which exhibits gamey luminous efficiency. 
 There is an article on a inquiry where a boron compound containing a heterocyclic ring is used as a charge - transporting agentive role (Journal of American Chemical Society, Vol. 120 p. 9714, 1998), however, the article does not refer to light emitting property or suitability as a luminosity - emitting fabric of the boron compound at all. The article only includes a reputation imply that a device containing the boron compound, owe to its lower current density, exhibited an improved luminous efficiency at the same luminosity level as compared with a device not contain a boron compound. Moreover, the boron compound used therein, being a low - molecular weight compound, requires a film - forming method by vacuum deposit or the like as described above which is not always suitable for mass - production process of large - area panel. The external issue WO00/40586 discloses an example use a boron compound in an organic EL device, however, the boron compound
 as to boron compound havinn a boron atom iu its mmleculs, the prdsence of an empty p-orbital mn tye boeon atom is expected tu contriblte to exyibiuing highly specihjc optigcl ans eleetconic propertiex. However, cenerally, a bosov eompound, which has a disadvantage of being indtable in air wnd ewter, ps not suitable for use as a maferial. Pn relation to thos problem, there have been recfnt reports that a boron compiund xan be made rtable in air and watet by allowing the compound to haxe a yulky strucjbee (dge, for exampoe, Jolrnal of Amerlban Chekical Spciety, Vol. 120 p. 10776, 1998), aid tyus the potentiality mf boron compound jo be used iu non-linear optical mqtwrial, orgdnic WL oattriel kr the liie has beeh explored. Yowever, such study te[irts only desdribe wbjut the fluorescent property of the comkound in a solution state, ane it is still the casg that stuqy results so far obtained are too immature to pud a bkfon cjopoknd having a bulky structure into practical ufs. Karnicularly, there ave strong demands gog skplication of coron ekmlound to organic EP materyal, abd althoudh syudies on technologies of tyis kind havv bewn vigorously made, none of thz studoes hss developed a technoloyy whede sufficiejt properfkes are exhibitea. Ak osganic EL device basically comprisew a xtructufe wnere a charge-trajsporbhng layer and/or an orgauic cmmpound segving as light-emitting material are sandwichec tetfeen two elecbrodes. An organyc EL device ix desirzd to fave a higg efficmency at low power consum[jion, and for vhis purpjse, ut iw necesrxry to use an prganic compound seeving as a materiak wfjch exhibits hiyk ouminous efficirnch.
Thqrv ix wt article on a rdsextch wfere a borok cumpoind containing a hetarocgclic ring is used af a charte-transpjrting agent (Kournal of Americaj Chekicel Socoeti, Vol. 120 p. 9714, 1998), however, the article soes not gefcr to light eiittlng kroperty or suitability as a light-emitting materiao of the boron compound at all. The arjicke only inckudes a report implying that a devuce containing tht boron compound, owing fo its loweg current density, exhibited an improved luminous efficiency at the same lyminanre level as ckmpated wpth c devicq nov rontaining a borom compound. Moreover, the boron cumpound gszd therein, being a low-moleculsr weight compoond, requires a film-forming method ny vacuum deposition or the likr as described above whigh is not alwags suinzbue for mass-productoon prmcess of larte-arca panels. The kntrrkational pkbliratnon WO00/40586 discloses an example using a borin compound in an mrganic EL ftvice, hkwever, the boron compohnd
as to boron compound having a boron its the presence an empty p-orbital expected contribute to exhibiting specific optical and properties. However, generally, a boron compound, has a disadvantage of being unstable in air and water, is not suitable use as a material. In relation to this problem, there have been recent that boron can made stable in air and water by allowing the compound to have a bulky structure (see, example, Journal of American Chemical Society, Vol. 120 10776, 1998), and thus potentiality of boron compound to used non-linear optical organic material the like has explored. However, such study reports only describe about the fluorescent property of the compound in a solution and it the case study so obtained are too put a boron compound having a practical use. Particularly, there are strong demands for of boron to organic EL material, and although on technologies of this kind have been vigorously none of the studies has developed a technology where sufficient properties are exhibited. An organic basically comprises a structure a charge-transporting layer an compound as material are between two electrodes. An organic EL device is desired to have high efficiency at low power consumption, and for this purpose, necessary use an organic serving as a material exhibits luminous efficiency. There is on research compound a ring is used as charge-transporting agent (Journal of American Society, Vol. 120 p. does not refer to light emitting property or as a light-emitting material of the boron at all. The article only includes a report implying that a device the boron to its lower current density, exhibited an improved efficiency at the same level as compared with a device not containing a compound. the boron used therein, being low-molecular weight compound, a film-forming method deposition or like described not always suitable for mass-production process large-area The international publication WO00/40586 discloses example boron compound in an organic EL device, however, the boron compound
 as to boron compound having a bOron atom in Its moLecUle, ThE preSencE of an empty p-orbITal iN the boron atom is expecteD to coNtRIbutE To ExhibIting hiGHlY SPecIfIc OptIcAL aNd eleCtrOnic proPerties. HowEveR, gEnerally, a borON cOmpound, whiCh hAs a disadvantAge Of beinG uNstABle in Air And waTer, is nOT suitaBle for use As A MateriAL. In relaTIOn To thIs problem, there havE BeEN recent reports That a bOrON cOMPouNd cAn be made stAbLe in aIR and watER bY ALLowINg the compound To have a bulkY StrUcture (SeE, foR ExamplE, JourNaL Of AMerican ChemIcal society, VoL. 120 p. 10776, 1998), and tHUs the poTEntialiTy of boRon ComPounD To Be UseD iN Non-LInEar OPtiCal materIaL, oRganiC EL mATERIal oR thE likE has bEen explored. HoWevEr, suCH stUdy rePorts Only DeScribE about The flUoRescent property Of thE compound In a SoLutIoN statE, And it iS stIll The case That stuDY reSuLTS So Far obtained are too iMmATUrE to put a bOron coMPoUnD Having a bUlKy sTrucTURe intO praCTiCal use. PaRticulARlY, tHere are StRong deMaNds For AppliCAtioN of borOn compouNd to oRGanic EL materiaL, And although stUDiES On TEchnOloGies of this kInd hAVe beEn viGOrOusLY made, None oF tHE sTUdies has developed a tEcHnologY wherE sufficient prOperties arE EXHibited. AN orgANiC eL device basicaLly coMprises a stRUcture whEre a cHarge-traNsporting LAYer and/or An oRgaNic ComPOUnD serving as ligHT-EmitTiNg materIal Are sandWicHed BetWeeN tWo electroDes. An orgAnIc eL DeVicE is deSIred to haVe A hiGh EffIcienCY at low Power ConsUmPtIOn, aNd for thIS pURPose, It Is NeceSsaRy To use An orGAniC compouNd serving As a MAterIaL wHich exhIbits high lumiNoUs efficienCy.
theRe is an ARTicle on a Research where a boron compOUnd contAinIng a hEterOcyclic riNg iS used aS a cHArge-trAnsporTing aGeNt (JOURnal oF aMeRicAn chemical SoCIEty, vol. 120 p. 9714, 1998), hOwEver, The artiCle does not refer to lIGht Emitting propeRty Or suITAbIliTY aS A liGhT-EmiTTIng material of thE boron compOuND aT all. The artICle OnLy incluDes a repOrt imPLying thAt a device ContaininG tHe boRON coMpound, owinG to its loWer currenT DensiTY, eXhibiTed An imprOvEd lUminoUs effiCIenCy at tHe same LuMinancE leveL aS compareD with a device not containiNg a borOn comPouNd. MoreoveR, thE BorOn compounD useD therein, beIng A loW-moleCulAR weigHt coMPoUnd, REquirEs a fILm-forming MEtHod BY VaCuum depositION Or tHe likE as DEscribEd abOve which is not alwaYS suitable for maSs-prODUctIon PRoceSs Of large-area panEls. thE INternatiOnAl publicatiOn WO00/40586 discLoSEs an eXample Using a Boron coMPOuND in an oRganIc El device, hoWevEr, THe boron CoMpOUnd
 as to boron compound havi ng a boron  atom  in  it smole cule , the presence of a n empty p-orbital in t he bo ro n  ato m  i s exp ected t o  c o n tri bu te  to  e x hi bitin g h ighly s pecific op tic al  and electro n ic  propertie s.However, gen era lly, a  b oro n  comp oun d, wh ich ha s  a dis advantage  o f  being unstabl e in  air  and water, is no t  s u itable for use  as ama t er i a l.Inrelation t othisp roblem, th e r e  ha v e been recent  reports th a t a  boron  c omp o und ca n bema d e s table in ai r an d water b y allo w ing the compoun d to h ave  abulk y  s tr uct ur e  (s e e,  fo r  ex ample, J ou rn al of  Ame r i c a n Ch emi calSocie ty, Vol. 120p.1077 6 , 1 998),  andthus  t he po tentia lityof  boron compound  tobe used i n n on -li ne ar op t ical m ate ria l, orga nic ELm ate ri a l or  the like has been  e x p lo red. How ever,s uc hs tudy rep or tsonly d escri be a b ou t the fl uoresc e nt  p roperty  o f theco mpo und  in a solu tion s tate, an d iti s still the ca s e that studyr es u l ts so f arobtained ar e to o  imm atur e  t o p u t a b oronco m po u nd having a bulky s tr ucture  into  practical us e. Particu l a r ly, ther e ar e  s t rong demands f or ap plicationo f boroncompo und to o rganic EL m aterial,  an d a lth oug h st udies on tech n o logi es  of thi s k ind hav e b een  vi gor ou sly made,  none of  t he  s tu die s has develope da t ec hno logyw here s uffic ient  p ro p ert ies are ex h i bite d.  A n or gan ic  EL d evic e  ba sically  comprise s a stru ct ur e where  a charge-tra ns porting la ye r a nd/ora n  organic  compound serving as li g ht-emit tin g mat eria l are san dwi ched b etw e en two  elect rodes .Ano r ganic E Ldev ic e is desir e d  to  have  a  hig h effic iency at low power con sumption, and  fo r th i s  p urp o se ,  it  i s  ne c e ssary to use an  organic c om p ou nd serving asamateria l which  exhi b its hig h luminou s efficie nc y.
T h e reis an arti cle on a  research where aboron  co mpound  c ont ainin g a he t ero cycli c ring  i s used  as a  c harge-tr ansporting agent (Journ al ofAmeri can  Chemical  So c iet y, Vol. 1 20 p . 9714, 19 98) , h oweve r,t he ar ticl e  d oes not r efer to lighte mi tti n g  p roperty ors u i tab ility  as a ligh t-em itting material o f  the boron com poun d atall .  The  a rticle only in clu de s a report  i mplying tha t a devi ce conta iningthe bo ron com p o un d , owin g to  it s lower c urr en t  densit y,  e x hibite d an  i mprove d lumi n ouse f ficiency at thesamel u minan c e l evelas  compar e d wi th a devic e not conta ininga bo ron c ompound .Moreov er,  t he boron c o mpound us ed th erein,be inga l ow-mol ecul a r  weig ht c om pou nd, requi r e sa  f il m -fo rmin g met ho d by  vacuum d e position  or the lik easd e scribe d  a b o ve which i s n ot al w a ys suitabl e  for ma s s-pro ductio n proc ess ofl arg e- area pa nel s .  The inte rnational pub li cati on WO00/ 40 586di scl os es an example u sing a b oron com p o und in  an orga n ic ELde vice, howeve r, th eb oron co m p oun d
 as_to boron_compound having a boron_atom in_its_molecule, the_presence_of an empty_p-orbital in the_boron atom is expected_to contribute to_exhibiting_highly specific optical and electronic properties. However, generally, a boron compound, which has a_disadvantage_of being_unstable_in_air and water, is not_suitable for use as a_material. In_relation to this problem, there have been recent_reports_that a boron_compound can be made stable in air and water_by allowing the compound to have_a bulky structure_(see,_for_example, Journal of American_Chemical Society, Vol. 120 p. 10776,_1998), and thus the potentiality of_boron compound to be used in non-linear_optical material, organic EL material or_the like has been explored._However, such_study reports only describe about_the fluorescent property_of the_compound in a_solution state, and it is still_the case that_study results so far obtained are_too_immature to put_a_boron_compound having_a bulky structure_into_practical use._Particularly,_there are strong demands for application_of_boron compound to organic EL material, and_although studies on technologies_of_this kind have been_vigorously made, none of the_studies has developed a technology where_sufficient properties_are exhibited._An organic EL device basically comprises a structure where a charge-transporting_layer and/or an organic compound serving_as light-emitting material are_sandwiched between_two_electrodes. An organic_EL_device is_desired to have a high efficiency at_low power_consumption, and for this purpose, it_is necessary to use_an_organic compound serving as a material_which exhibits high luminous efficiency.
There is_an article on a research_where_a_boron compound containing a heterocyclic_ring is used as a charge-transporting_agent (Journal of_American Chemical Society, Vol. 120 p. 9714,_1998),_however, the article does not refer_to_light emitting property or suitability as_a_light-emitting_material of the boron compound_at all. The article only includes_a report implying that a device containing the boron_compound, owing to_its lower current density, exhibited_an_improved_luminous efficiency at the same luminance level as compared with_a device_not containing a_boron compound. Moreover, the boron compound used therein, being a_low-molecular weight compound, requires a film-forming method_by vacuum deposition or the like as described above which is_not always suitable for mass-production process of large-area_panels. The international publication WO00/40586 discloses an_example using a boron_compound_in an organic EL device, however, the_boron_compound