Engineering of Electron-Selective Contact for Perovskite Solar Cells with Efficiency Exceeding 15%

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• 作者：Qin Hu ; Jiang Wu ; Chang Jiang ; Tanghao Liu ; Xinglu Que ; Rui Zhu ; Qihuang Gong
• 刊名：ACS Nano
• 出版年：2014
• 出版时间：October 28, 2014
• 年：2014
• 卷：8
• 期：10
• 页码：10161-10167
• 全文大小：461K
• ISSN：1936-086X

文摘

The past 5 years have witnessed the rise of highly efficient organometal halide perovskite-based solar cells. In conventional perovskite solar cells, compact n-type metal oxide film is always required as a blocking layer on the transparent conducting oxide (TCO) substrate for efficient electron-selective contact. In this work, an interface engineering approach is demonstrated to avoid the deposition of compact n-type metal oxide blocking film. Alkali salt solution was used to modify the TCO surface to achieve the optimized interface energy level alignment, resulting in efficient electron-selective contact. A remarkable power conversion efficiency of 15.1% was achieved under AM 1.5G 100 mW路cm^鈥? irradiation without the use of compact n-type metal oxide blocking layers.

Keywords:

electron-selective contact; perovskite solar cells; interface engineering