材料科学
钙钛矿(结构)
异质结
钙钛矿太阳能电池
光电子学
太阳能电池
化学工程
工程类
作者
Ran Ji,Zongbao Zhang,Marielle Deconinck,Yvonne J. Hofstetter,Juanzi Shi,Fabian Paulus,Parth Raval,G. N. Manjunatha Reddy,Yana Vaynzof
标识
DOI:10.1002/aenm.202304126
摘要
Abstract Interfacial modification is a key strategy for improving the performance of perovskite photovoltaic devices. While the modification of the top surface of the perovskite active layer is well established, engineering of the buried interface is highly challenging. Here, the spontaneous formation of a 1D/3D perovskite heterojunction at the buried interface of a perovskite active layer by incorporating choline acetate alongside the perovskite precursors is reported. Importantly, extensive spectroscopic and microscopic characterization and solid‐state nuclear magnetic resonance experiments demonstrate the formation of phase‐pure 1D and 3D domains. The 1D/3D junction results in a suppression of the defect states and an improved energetic level alignment at the buried interface, leading to a maximum power conversion efficiency of >24% when incorporated in inverted architecture perovskite solar cells. This work introduces a versatile approach to the modification of the buried interface of the perovskite active layer.
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