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A polymer tandem solar cell with 10.6% power conversion efficiency
Open accessAbstract
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 <1.4 eV), poly[2,7-(5,5-bis-(3,7-dimethyloctyl)-5H-dithieno[3,2-b:2',3'-d]pyran)-alt-4,7-(5,6-difluoro-2,1,3-benzothia diazole)] with a bandgap of 1.38 eV, high mobility, deep highest occupied molecular orbital. As a result, a single-junction device shows high external quantum efficiency of >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%.
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Metadata
- Authors
- You, J., Dou, L., Yoshimura, K., Kato, T., Ohya, K., Moriarty, T., Emery, K., Chen, C.-C., Gao, J., Li, G., & Yang, Y.
- Venue
- Nature Communications
- Published
- 2013-02-05
- Volume
- 4
- Issue
- 1
- Pages
- 1446-1446
- ISSN
- 2041-1723 (ISSN-L)
- OpenAlex
- W2096320304
- Cited by
- 2,778
- References
- 48
- FWCI
- 375.24
- Type
- journal article
- Language
- en
- Open access
- hybrid
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