Unfortunately, the electronic bandgap of the h-BN is too large (natural insulator) that lacks the semiconducting functionality. Therefore, most of the h-BN materials are used as insulating materials and restricts its application in several optoelectronic devices. Various approaches such as doping, vacancy defects, absorption, strain, external electric field, and chemical passivation in the pristine 2D structure [23] have been implemented to settle this problem. However, applying an external electric field or strain would considerably make the device configuration complicated . Meanwhile, several experimental and theoretical works show that chemical passivation is one of the best approaches to tune the structural, electronic, and optical properties of the compound. For instance, the first-principles calculations demonstrate that fluorination is a practical route to induce halfmetallicity in zigzag boron nitride nanoribbon . Similarly, the passivation of hydrogen and fluorine on the h-BN monolayer changes the electronic and magnetic properties drastically . The structural and electronic properties of graphene supported on FBNF monolayer substrate modifies the electronic properties of graphene supporting the fabrication of high-performance graphene-based nanodevices . Additionally, the controlled adsorption of fluorine atoms on both sides of a pristine h-BN sheet induces flatness distortion and an out-of-plane dipole moment in a chair conformer . The fluorination of electrically insulating the h-BN subsequently modifies the electronic band structure to a wide bandgap magnetic semiconductor via the introduction of defect levels. The electrophilic nature of fluorine causes changes in the charge distribution around neighboring nitrogen atoms in the h-BN, leading to room temperature weak ferromagnetism . Very recently, an experimental study shows that exfoliation of the h-BN sheets from bulk material and surface treatment by fluorination makes structural improvements that lead to enhancement in electrical and optical properties .