Investigating Opto-Electronic Performance of RbSiBr3 Multi-junction Solar PV Material: A Path Toward Sustainable Development

The cubic inorganic metal halide perovskite compound RbSiBr3 is thermodynamically and mechanically stable because of its good absorption of photons. The present work is oriented on finding optoelectronic properties of the RbSiBr3 compound by simulation tool: DFT (density functional theory) which is compiled in Wien2k code. All simulation works of finding the optoelectronic properties are carried out by TB-mBJ (Tran-Blaha-modified Becke Johnson) exchange–correlation potential. The electronic computations announced the 0.84 eV band gap of this compound that shows its handiness in the lower layer of multi-junction solar cells. The analysis of optical properties gives lower reflection and high absorption coefficient that proves its adaptation in optoelectronic applications.