Inorganic-organic halide perovskites for new photovoltaic technology

Perovskite solar cells (PSCs) have received worldwide attention due to excellent power-to-electricity conversion efficiency (PCE). Currently, a PCE record of as high as 22.1% has been achieved, comparative to those of copper indium gallium selenide and CdTe solar cells. However, there are still some critical issues to solve, especially the stability issue at the current state, in order to promote PSC commercialization. In this respect, various device architectures and the working principle are briefly introduced. Then, key features of inorganic-organic hybrid perovskites and related film deposition methods are discussed. Typically, experimental and theoretical efforts to reveal the physical issues of the device are emphasized as well as the cell stability. Finally, a short summary, challenge and prospect are given.