DOI: https://doi.org/10.29363/nanoge.hybridoe.2021.004
Publication date: 3rd December 2021
Metal halide perovskites serving as one of the most promising photovoltaic materials are gaining considerable attention worldwide. For achieving high performance as well as long-term stability of the perovskite solar cells (PSCs), a good quality of perovskite film featuring in smooth, pinhole-free morphology, full coverage over substrates, good heterojunction contacts, and stable photoactive phase, is of great importance. During solution fabrication for perovskite films, intermediate phase, which refers to the state of precursor composition before final annealing, plays essential roles in determining the film quality, especially in the state-of-the-art PSCs. We review the research involving mechanism and applications of intermediate phase engineering (IPE) processes in various solution-processing technologies. Challenges and perspectives of IPE in high-quality perovskite films are further discussed.
Z.W. acknowledges the Banting Postdoctoral Fellowships Program of Canada.
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