Interface design for high-efficiency non-fullerene polymer solar cells. Issue 8 (12th April 2017)

• Record Type: Journal Article
• Authors: Sun, Chen; Wu, Zhihong; Hu, Zhanhao; Xiao, Jingyang; Zhao, Wenchao; Li, Ho-Wa; Li, Qing-Ya; Tsang, Sai-Wing; Xu, Yun-Xiang; Zhang, Kai; Yip, Hin-Lap; Hou, Jianhui; Huang, Fei; Cao, Yong
• Is Part Of: Energy & environmental science. Volume 10:Issue 8(2017)
• Page Start: 1784
• Page End: 1791
• Publication Date: 2017-04-12
• Subjects: Energy conversion -- Periodicals; Fuel switching -- Periodicals; Environmental sciences -- Periodicals; Environmental chemistry -- Periodicals; 333.79
• DOI: 10.1039/c7ee00601b
• Languages: English
• ISSNs: 1754-5692

Abstract

Abstract : The contact between the n-type interlayer and the donor provides an extra interface for charge dissociation. 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.