Simulation and Analysis of Perovskite Solar Cell Based on Germanium

Abstract

The search for low-cost materials ton turn solar energy into electricity is a challenge for researchers. Lead-free perovskite solar cells have been of interest for research because of the toxicity of this material. The perovskite CH3NH3PbI3 solar cells have a conversion efficiency of about 22%. In this work lead is replaced by germanium. The solar cell analysis is performed using a digital tool «Solar Cell Capacitance Simulator (SCAPS)» Solar cell capacitance simulator was developed by Marc Burgelman at the University of Gent. SCAPS is used to analyses the micro and poly crystalline and photonic structure. SCAPS measure various parameters of a solar cell like open circuit voltage, Fill Factor, Short circuit current density, PCE. SCAPS and runs using the governing equations which includes continuity equations, Poisson equation, of electron and hole. The solar cell structures is based on the mixed perovskite compound as an absorbent layer and Pedot:Pss is used as HTM; PCBM is used as ETM. The contact materials are FTO coated glass (Front contact) and Al (back contact) is used. The total cell structure Al/Pedot:Pss/CH3NH3GeI3-PCBM/FTO. We study the influence of thickness of absorber layer on solar cell performance, efficiency (η) open circuit voltage (VOC) and short-circuit density (Jsc) and fil factor (FF).