A Qualitative Theoretical Study of Inorganic HTM-Free RbGeI3 Based Perovskite Solar Cells Using SCAPS 1D as a Pathway Towards 3.601% Efficiency

Abstract

The presence of toxic lead in perovskite solar cells has hindered its commercial viability. In this present work, a mesoscopic inorganic lead-free perovskite solar cells based on RbGeI3 was proposed and implemented using SCAPs simulation tool. The effect of electron transport material (ETM) and Absorber thickness were analyzed. When the device was first simulated, its power conversion efficiency (PCE), fill factor (FF), current density (Jsc), and open circuit voltage (Voc) all reached values of 3.584% for PCE, 48.477% for FF, 25.385 mA/cm2 for Jsc, and 0.291 V for Voc. When the ETM and absorber are at their ideal thicknesses of 0.08 and 0.40, the development of efficiency becomes stable. Using the aforementioned parameters, the optimized PSC device produced the following values: PCE = 3.601%, Jsc = 25.386 mA/cm2, Voc = 0.291 V, and FF = 48.637%. The PCE improvement over the basic device without optimization is around 1.01 times. The findings indicate that perovskite solar cell lacking HTM has a substantial capacity to absorb photon energy and produce electrons. It has also shown how to create environmentally clean and economically viable technology.