Four-Terminal Tandem Solar Cells Using CH3NH3PbBr3 by Spectrum Splitting

作者：Sheng Rui; Ho Baillie Anita W Y^*; Huang Shujuan; Keevers Mark; Hao Xiaojing; Jiang Liangcong; Cheng Yi Bing; Green Martin A

来源：Journal of Physical Chemistry Letters, 2015, 6(19): 3931-3934.

DOI：10.1021/acs.jpclett.5b01608

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.

• 出版日期2015-10-1