Planar Heterojunction Perovskite Solar Cells via Vapor-Assisted Solution Process

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• 作者：Qi Chen ; Huanping Zhou ; Ziruo Hong ; Song Luo ; Hsin-Sheng Duan ; Hsin-Hua Wang ; Yongsheng Liu ; Gang Li ; Yang Yang
• 刊名：Journal of the American Chemical Society
• 出版年：2014
• 出版时间：January 15, 2014
• 年：2014
• 卷：136
• 期：2
• 页码：622-625
• 全文大小：253K
• ISSN：1520-5126

文摘

Hybrid organic/inorganic perovskites (e.g., CH₃NH₃PbI₃) as light absorbers are promising players in the field of third-generation photovoltaics. Here we demonstrate a low-temperature vapor-assisted solution process to construct polycrystalline perovskite thin films with full surface coverage, small surface roughness, and grain size up to microscale. Solar cells based on the as-prepared films achieve high power conversion efficiency of 12.1%, so far the highest efficiency based on CH₃NH₃PbI₃ with the planar heterojunction configuration. This method provides a simple approach to perovskite film preparation and paves the way for high reproducibility of films and devices. The underlying kinetic and thermodynamic parameters regarding the perovskite film growth are discussed as well.