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Issue 8, 2017
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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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Supplementary files

Article information


Submitted
02 Mar 2017
Accepted
03 Apr 2017
First published
03 Apr 2017

Energy Environ. Sci., 2017,10, 1784-1791
Article type
Paper

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, 10, 1784
DOI: 10.1039/C7EE00601B

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