A polymer tandem solar cell with 10.6% power conversion efficiency

Jingbi You, Letian Dou, Ken Yoshimura, Takehito Kato, Kenichiro Ohya, Tom Moriarty, Keith Emery, Chun-Chao Chen, Jing Gao, Gang Li () and Yang Yang ()
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Jingbi You: University of California, Los Angeles
Letian Dou: University of California, Los Angeles
Ken Yoshimura: Tsukuba Material Development Laboratory, Sumitomo Chemical Co., Ltd. 6
Takehito Kato: Tsukuba Material Development Laboratory, Sumitomo Chemical Co., Ltd. 6
Kenichiro Ohya: Tsukuba Material Development Laboratory, Sumitomo Chemical Co., Ltd. 6
Tom Moriarty: National Renewable Energy Laboratory
Keith Emery: National Renewable Energy Laboratory
Chun-Chao Chen: University of California, Los Angeles
Jing Gao: University of California, Los Angeles
Gang Li: University of California, Los Angeles
Yang Yang: University of California, Los Angeles

Nature Communications, 2013, vol. 4, issue 1, 1-10

Abstract: Abstract An effective way to improve polymer solar cell efficiency is to use a tandem structure, as a broader part of the spectrum of solar radiation is used and the thermalization loss of photon energy is minimized. In the past, the lack of high-performance low-bandgap polymers was the major limiting factor for achieving high-performance tandem solar cell. Here we report the development of a high-performance low bandgap polymer (bandgap 60% and spectral response that extends to 900 nm, with a power conversion efficiency of 7.9%. The polymer enables a solution processed tandem solar cell with certified 10.6% power conversion efficiency under standard reporting conditions (25 °C, 1,000 Wm−2, IEC 60904-3 global), which is the first certified polymer solar cell efficiency over 10%.

Date: 2013
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DOI: 10.1038/ncomms2411

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