EFFICIENT PEROVSKITE SOLAR CELL WITHOUT ELECTRON TRANSPORT LAYER

Perovskite solar cells (PSCs) have gained substantial interest as a rival technology in solar cells due to the dramatic rise in their power conversion efficiency (PCE) in the last two decades. PSCs have many advantages such as bandgap tunability, low-cost, long diffusion length, low recombination rate, excellent transport of ambient charge carrier, wide optical absorption and high open circuit voltage. In this paper, we have firstly performed a simulation study on an initial PSC structure with zinc oxysulfide (ZnOS) as an electron transport material (ETM) and Copper Oxide (CuO) as Hole Transport Material (HTM). ZnOS and CuO are good candidates to the conventional HTMs and ETMs; like TiO2 and the costly Spiro-OMeTAD to avoid their limitations. Then, the influence of doping in the solar cell layers has been introduced. Consequently, a PSC without electron transport layer (ETL) has been proposed to replace the p-i-n design of the PSC with p-n PSC. The performance evaluation of the proposed PSC has been performed utilizing SCAPS-1D. The results show that the doped mixed halide p-n PSC with CuO as HTM and without ETL has an efficient performance as the PCE has been enhanced from 29.34% to 32.19%.