Highly efficient and stable low-temperature processed ZnO solar cells with triple cation perovskite absorber

Abstract

Although ZnO is a compatible electron transport layer (ETL) for perovskite solar cells (PSCs), the fact that MAPbI₃ easily undergoes thermal decomposition on a low-temperature processed ZnO surface limits the use of one-step deposition of perovskite and hence the resulting photovoltaic performance. The triple cation perovskite prepared with a one-step deposition method is demonstrated to be a stable light absorber in highly efficient PSCs with low-temperature processed ZnO as the ETL.