期刊
ENERGY & ENVIRONMENTAL SCIENCE
卷 10, 期 8, 页码 1784-1791出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c7ee00601b
关键词
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资金
- Ministry of Science and Technology [2014CB643500]
- Natural Science Foundation of China [21634004, 51521002, 51323003, 21761132001, 91633301]
- Science and Technology Program of Guangzhou, China [201607020010]
- Guangdong Natural Science Foundation [S2012030006232]
Non-fullerene polymer solar cells have attracted extensive attention due to their potential for overcoming the performance bottleneck currently encountered in fullerene-based photovoltaics. Herein, we report non-fullerene polymer solar cells with a maximal power conversion efficiency of over 11% by introducing an n-type water/alcohol soluble conjugated polymer as a cathode interlayer. We found that the contact between the n-type interlayer and the donor provides an extra interface for charge dissociation and the matching of energy levels between the n-type interlayer and the acceptor allows efficient electron extraction from the bulk heterojunction, which eventually leads to much improved performance. This study proposes a significant design rule for designing new interfaces for high performance non-fullerene photovoltaics.
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