Control of organic-inorganic halide perovskites in solid-state solar cells: a perspective

Since the year of 2009 when the first application of organohalide lead perovskite as the light harvester in solar cells was reported, tremendous attention has been devoted to these new types of perovskite-based solid-state solar cells and remarkable power conversion efficiency of over 20% has been achieved to date. In this review, we first introduce the properties of organic-inorganic halide perovskites and then focus on the notable achievements made on the perovskite layer to improve the power conversion efficiency of solid-state perovskite solar cells, which is featured by process engineering of the state-of-the-art lead methylammonium triiodide perovskite and material control of lead triiodide perovskites and other newly emerged perovskites. In the end, we wish to provide an outlook of the future development in solid-state perovskite solar cells. Provided that the instability and toxicity of solid-state perovskite solar cells can be solved, we will witness a new era for cost-effective and efficient solar cells.