Highly Efficient Organic Solar Cells Consisting of Double Bulk Heterojunction Layers |
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| Authors: | Jiang Huang Hanyu Wang Kangrong Yan Xiaohua Zhang Hongzheng Chen Chang‐Zhi Li Junsheng Yu |
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| Affiliation: | 1. State Key Laboratory of Electronic Thin Films and Integrated Devices, School of Optoelectronic Information, University of Electronic Science and Technology of China (UESTC), Chengdu, P. R. China;2. MOE Key Laboratory of Macromolecular Synthesis and Functionalization, State Key Laboratory of Silicon Materials, Department of Polymer Science and Engineering, Zhejiang University, Hangzhou, P. R. China |
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| 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%. |
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| Keywords: | double bulk heterojunctions mobility organic solar cells power conversion efficiency stamping transfer method |
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