Crack-free perovskite layers for high performance and reproducible devices via improved control of ambient conditions during fabrication

摘要

Organic-inorganic perovskite has shown one of the most rapid growths ever in photovoltaic history and achieved remarkable achievement with PCE of 22.1%. Since the first perovskite solar cells (PSCs) was reported in 2009, it always existed a problem that the performance of PSCs prepared in winter is much better than summer due to films cracking. In this article, we explored the reasons for this phenomenon and provided a corresponding solution. It was found that film cracking was a major contributor for losses of PSCs performance. By adjusting ambient temperature of operating environment, the film quality and device performance can be increased effectively.