All‐Inorganic Halide Perovskites for Optoelectronics: Progress and Prospects (Solar RRL 10∕2017)

Organic–inorganic metal halide (OMH) perovskites have drawn tremendous attention due to their unprecedented optoelectronic properties, such as large absorption coefficient, high charge carrier mobility, long electron-hole diffusion, and tunable bandgap. During the past years, solution-processed OMH perovskites have become some of the most notable materials because they can exhibit high solar cell efficiency. Moreover, the high performances of OMH perovskites have been applied for other optoelectronic devices, such as photodetectors and light-emitting-diodes, showing its great potential in future. However, due to the volatile and hygroscopic nature of the organic cations, OMH perovskites suffer from chemical instability, especially at high temperature. In this review (article No. 201700086) the recent progress on the syntheses of IMH perovskites is outlined and the research development of IMH perovskites in optoelectronic devices is introduced. Finally, the challenges facing the field of IMH perovskites are discussed and possible solutions based on the available literature are suggested.