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A Tetraperylene Diimides Based 3D Nonfullerene Acceptor for Efficient Organic Photovoltaics
Shi-Yong Liu1, Chen-Hao Wu2, Chang-Zhi Li3
1Department of Materials Science and Engineering University of Washington Box 352120 Seattle WA 98195 USA; Department of Polymer Science and Engineering Zhejiang University Hangzhou 310027 P.R. China; Department of Pharmacy and Chemistry Taizhou University Taizhou 317000 P.R. China.
Abstract:
A nonfullerene acceptor based on a 3D tetraperylene diimide is developed for bulk heterojunction organic photovoltaics. The disruption of perylene diimide planarity with a 3D framework suppresses the self-aggregation of perylene diimide and inhibits excimer formation. From planar monoperylene diimide to 3D tetraperylene diimide, a significant improvement of power conversion efficiency from 0.63% to 3.54% can be achieved.
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