Four-Terminal Tandem Solar Cells Using CH3NH3PbBr3 by Spectrum Splitting

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• 作者：Rui Sheng ; Anita W. Y. Ho-Baillie ; Shujuan Huang ; Mark Keevers ; Xiaojing Hao ; Liangcong Jiang ; Yi-Bing Cheng ; Martin A. Green
• 刊名：The Journal of Physical Chemistry Letters
• 出版年：2015
• 出版时间：October 1, 2015
• 年：2015
• 卷：6
• 期：19
• 页码：3931-3934
• 全文大小：285K
• ISSN：1948-7185

文摘

In this work, the use of a high bandgap perovskite solar cell in a spectrum splitting system is demonstrated. A remarkable energy conversion efficiency of 23.4% is achieved when a CH₃NH₃PbBr₃ solar cell is coupled with a 22.7% efficient silicon passivated emitter rear locally diffused solar cell. Relative enhancements of >10% are demonstrated by CH₃NH₃PbBr₃/CH₃NH₃PbI₃ and CH₃NH₃PbBr₃/multicrystalline-screen-printed-Si spectral splitting systems with tandem efficiencies of 13.4% and 18.8%, respectively. The former is the first demonstration of an all perovskite split spectrum system. The CH₃NH₃PbBr₃ cell on a mesoporous structure was fabricated by the vapor-assisted method while the planar CH₃NH₃PbI₃ cell was fabricated by the gas-assisted method. This work demonstrates the advantage of the higher voltage output from the high bandgap CH₃NH₃PbBr₃ cell and its suitability in a tandem system.