Physical Parameters Optimization for Cost Minimization of Perovskite Solar Cell with Inexpensive HTM, ETM and Back Contact Material

In this study, an all-perovskite solar cell is proposed consists of MASnI3, CsSnI3 and MAGeI3 proposed to replace conventional expensive HTM, ETM. Several physical parameters of each layer (HTM, ETM and Absorber) of the proposed cell including thickness, doping density, defect density, electron affinity, temperature, series resistance and metal work function have been analyzed. After analyzing the physical parameters of each layer of the proposed cell it is found that MASnI3, CsSnI3 and MAGeI3 can be costeffective and non-toxic alternatives of expensive and toxic HTM, absorber and ETM to provide optimal efficiency. Although several back contact materials can provide maximum efficiency for the proposed cell, Ni has the lowest cost among them. Hence, we have considered Ni as the back contact for the proposed cell. The proposed cell with Ni as back contact can provide an open circuit voltage (Voc) of 0.97V, a short circuit current (Jsc) of 35.16mA/cm2, a fill factor (FF) of 82.92% and a power conversion efficiency (PCE) of 28.28%.