期刊
NATURE PHOTONICS
卷 6, 期 3, 页码 180-185出版社
NATURE PORTFOLIO
DOI: 10.1038/NPHOTON.2011.356
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资金
- National Science Foundation (NSF) [CHE0822573]
- Air Force Office of Scientific Research (AFOSR) [FA9550-09-1-0610]
- Office of Naval Research (ONR) [N00014-04-1-0434]
- US Department of Energy [DE-AC36-08-GO28308]
- National Renewable Energy Laboratory
- Division Of Chemistry
- Direct For Mathematical & Physical Scien [0822573] Funding Source: National Science Foundation
Tandem solar cells provide an effective way to harvest a broader spectrum of solar radiation by combining two or more solar cells with different absorption bands. However, for polymer solar cells, the performance of tandem devices lags behind single-layer solar cells mainly due to the lack of a suitable low-bandgap polymer. Here, we demonstrate highly efficient single and tandem polymer solar cells featuring a low-bandgap conjugated polymer (PBDTT-DPP: bandgap, similar to 1.44 eV). A single-layer device based on the polymer provides a power conversion efficiency of similar to 6%. When the polymer is applied to tandem solar cells, a power conversion efficiency of 8.62% is achieved, which is, to the best of our knowledge, the highest certified efficiency for a polymer solar cell to date.
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