Electron Transport Assisted by Transparent Conductive Oxide Elements in Perovskite Solar Cells
Wenqi Zhang, Zhichao Lin, Qingbin Cai, Xiangning Xu, Hongye Dong, Cheng Mu, Jianping Zhang
Abstract
Abstract Fluorine and indium elements in F‐doped SnO 2 (FTO) and Sn‐doped In 2 O 3 (ITO), respectively, significantly contribute toward enhancing the electrical conductivity of these transparent conductive oxides. In this study, fluorine was combined with indium to modify the SnO 2 electron transport layer (ETL) through InF 3 . Consequently, the modified perovskite solar cells (PSCs) showe the favorable alignment of energy levels, improved absorption and utilization of light, enhanced interfacial charge extraction, and suppressed interfacial charge recombination. After InF 3 modification, the open circuit voltage ( V oc ) and fill factor (FF) of the PSC were significantly improved, and the photoelectric conversion efficiency (PCE) reached 21.39 %, far exceeding that of the control PSC (19.62 %).