Synthesis, characterization and device simulation of the thin films of CH3NH3PbI3 perovskite absorber and CdS buffer layer

Here we synthesized halide perovskite absorber CH3NH3PbI3 and CdS as charge transporting layer for perovskite photovoltaic device. Perovskite absorber and CdS were characterized by X-ray diffraction, UV-Visible spectrophotometry and SEM. The energy gap and structure of CH3NH3PbI3 and CdS were found to be suitable for use as absorber and electron transporting layer in perovskite solar cell device respectively. Numerical simulation of CH3NH3PbI3 perovskite solar cells was then carried out using the SCAPS-1D solar cell capacitance simulator software. A perovskite solar cell was simulated for best efficiency by replacing the traditional compact TiO2 layer with CdS (i.e., a hole-blocking layer) because CdS layers possess a greater photostability than TiO2 with continuous illumination of sunlight. We investigated the effect of layer parameters like absorber thickness, bulk defects, and interface defects on the device performance of CdS based perovskite photovoltaic device. It was observed that these parameters have strong impact on open circuit voltage Voc, short circuit current Isc, fillfactor (FF) and the power conversion efficiency. The device characteristics and optimization of the solar photovoltaic device was recorded and presented in paper.Here we synthesized halide perovskite absorber CH3NH3PbI3 and CdS as charge transporting layer for perovskite photovoltaic device. Perovskite absorber and CdS were characterized by X-ray diffraction, UV-Visible spectrophotometry and SEM. The energy gap and structure of CH3NH3PbI3 and CdS were found to be suitable for use as absorber and electron transporting layer in perovskite solar cell device respectively. Numerical simulation of CH3NH3PbI3 perovskite solar cells was then carried out using the SCAPS-1D solar cell capacitance simulator software. A perovskite solar cell was simulated for best efficiency by replacing the traditional compact TiO2 layer with CdS (i.e., a hole-blocking layer) because CdS layers possess a greater photostability than TiO2 with continuous illumination of sunlight. We investigated the effect of layer parameters like absorber thickness, bulk defects, and interface defects on the device performance of CdS based perovskite photovoltaic device. It was observed that these parameters ...