title: Highly Efficient Organic Solar Cells Consisting of Double Bulk Heterojunction Layers.
abstract: An organic solar cell (OSCs) containing double bulk heterojunction (BHJ) layers, namely, double-BHJ OSCs is constructed via stamp transferring of low bandgap BHJ atop of mediate bandgap active layers. Such devices allow a large gain in photocurrent to be obtained due to enhanced photoharvest, without suffering much from the fill factor drop usually seen in thick-layer-based devices. Overall, double-BHJ OSC with optimal ≈50 nm near-infrared PDPP3T:PC71BM layer atop of ≈200 nm PTB7-Th:PC71BM BHJ results in high power conversion efficiencies over 12%.
authors.affiliation: State Key Laboratory of Electronic Thin Films and Integrated Devices, School of Optoelectronic Information, University of Electronic Science and Technology of China (UESTC), Chengdu, 610054, P. R. China.
authors.forename: Jiang
authors.initials: J
authors.lastname: Huang
authors.affiliation: State Key Laboratory of Electronic Thin Films and Integrated Devices, School of Optoelectronic Information, University of Electronic Science and Technology of China (UESTC), Chengdu, 610054, P. R. China.
authors.forename: Hanyu
authors.initials: H
authors.lastname: Wang
authors.affiliation: MOE Key Laboratory of Macromolecular Synthesis and Functionalization, State Key Laboratory of Silicon Materials, Department of Polymer Science and Engineering, Zhejiang University, Hangzhou, 310027, P. R. China.
authors.forename: Kangrong
authors.initials: K
authors.lastname: Yan
authors.affiliation: State Key Laboratory of Electronic Thin Films and Integrated Devices, School of Optoelectronic Information, University of Electronic Science and Technology of China (UESTC), Chengdu, 610054, P. R. China.
authors.forename: Xiaohua
authors.initials: X
authors.lastname: Zhang
authors.affiliation: MOE Key Laboratory of Macromolecular Synthesis and Functionalization, State Key Laboratory of Silicon Materials, Department of Polymer Science and Engineering, Zhejiang University, Hangzhou, 310027, P. R. China.
authors.forename: Hongzheng
authors.initials: H
authors.lastname: Chen
authors.affiliation: MOE Key Laboratory of Macromolecular Synthesis and Functionalization, State Key Laboratory of Silicon Materials, Department of Polymer Science and Engineering, Zhejiang University, Hangzhou, 310027, P. R. China.
authors.forename: Chang-Zhi
authors.initials: CZ
authors.lastname: Li
authors.affiliation: State Key Laboratory of Electronic Thin Films and Integrated Devices, School of Optoelectronic Information, University of Electronic Science and Technology of China (UESTC), Chengdu, 610054, P. R. China.
authors.forename: Junsheng
authors.initials: J
authors.lastname: Yu
keywords: double bulk heterojunctions; mobility; organic solar cells; power conversion efficiency; stamping transfer method