Four-terminal tandem solar cells using CH3NH3PbBr3 by spectrum splitting

Rui Sheng, Anita W.Y. Ho-Baillie, Shujuan Huang, Mark Keevers, Xiaojing Hao, Liangcong Jiang, Yi-Bing Cheng, Martin A. Green

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Abstract

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.
Original languageEnglish
Pages (from-to)3931 - 3934
Number of pages4
JournalJournal of Physical Chemistry Letters
Volume6
Issue number19
DOIs
Publication statusPublished - 2015

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