Perspective on Predominant Metal Oxide Charge Transporting Materials for High-Performance Perovskite Solar Cells

Nowadays, the power conversion efficiency of organometallic mixed halide perovskite solar cells (PSCs) is beyond 25%. To fabricate highly efficient and stable PSCs, performance metal oxide charge transport layers (CTLs) one key factors. The CTLs are employed in PSCs to separate electrons holes generated active layer, suppressing recombination rate so that collection can be increased at their respective electrodes. In general, engineering electron (ETLs) found dominated research community boost due resilient features ETLs such as excellent electronic properties, high resistance thermal temperature moisture, ensuring good device stability well versatility material preparation. hole recently intensively studied. very promising by using optimized materials. This review concisely discusses evolution some prevalent materials (CTMs) including TiO 2 , SnO NiO x which able yield high-performance PSCs. article begins with introducing development trend different types CTLs, pointing out important criteria for oxides being effective then a variety preparation methods discussed. Finally, challenges prospects future direction toward scalable CTM-based delineated.