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Interface design for high-efficiency non-fullerene polymer solar cells

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Abstract

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.

Graphical abstract: Interface design for high-efficiency non-fullerene polymer solar cells

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Publication details

The article was received on 02 Mar 2017, accepted on 03 Apr 2017 and first published on 03 Apr 2017


Article type: Paper
DOI: 10.1039/C7EE00601B
Citation: Energy Environ. Sci., 2017, Advance Article
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    Interface design for high-efficiency non-fullerene polymer solar cells

    C. Sun, Z. Wu, Z. Hu, J. Xiao, W. Zhao, H. Li, Q. Li, S. Tsang, Y. Xu, K. Zhang, H. Yip, J. Hou, F. Huang and Y. Cao, Energy Environ. Sci., 2017, Advance Article , DOI: 10.1039/C7EE00601B

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