Influence of carrier mobility mismatch over the performance of heterojunction MAPbI3 based Perovskite solar cells

Abstract

In this paper, the planer n-i-p perovskite solar cell Glass/FTO/ZnO/MAPbI3/Spiro-OMeTAD/Ag structured heterojunction methylammonium lead tri-iodide (MAPbI3) based perovskite solar cell (PSC) is modeled and studied. The carrier mobility of the absorber layer is observed to be a major contributor to device performance. The study aims to computationally (using SCAPS-1D) analyze the effect of mismatch between charge carrier mobility of ETL & absorber and HTL & absorber over the performance of perovskite solar cells. It is observed that reduced mismatch of hole mobility between MAPbI3 and Spiro-OMeTAD layers and electron mobility between MAPbI3 and ZnO layers play an important role in improving the performance of PSCs. The computationally optimized maximum power conversion efficiency (PCE) is 13.92 % and 13.52 % respectively.