Superior performance of rubidium/acetate co-doped CsPbIBr₂ perovskite solar cells: A comprehensive analysis

The development of remarkably resourceful, effectively phase stable, and highly crystalline-minimal defect perovskite (PVT)-based solar cells (PSCs) is extremely needful for the existing energy requisites. The strategy of incorporating appropriate dopants such as metal cations/anions into inorganic PVT lattices has been recognized as a successful methodology to attain aforesaid PSCs. On that account, this analysis reveals the implication of rubidium (Rb)/ acetate (Ac) (cation/anion) co-doping upon cesium (Cs)-based, bromine (Br)-rich PVT: CsPbIBr₂ against undoped equivalent. The thorough numerical study on recommended structure: FTO/SnO₂/CsPbIBr₂/CuAlO₂/Ag specifying recombination profiles and performance parameters with respect to layer parameters of PVT absorber and charge transport layers conveyed supreme behavior from co-doped devices. It is evidenced that highest efficiency of 16.79 % is accomplished from Rb/Ac co-doped PSC for PVT electron mobility of 25 cm²V^-1s⁻¹. The work reveals the progress in photovoltaic characteristics of inorganic PSCs through the involvement of multi-source co-doping.