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题名: Perfluoroalkyl-substituted conjugated polymers as electron acceptors for all-polymer solar cells: the effect of diiodoperfluoroalkane additives
作者: Zhang, Andong1; Wang, Qiang2, 3; Bovee, Ralf A. A.2, 3; Li, Cheng1; Zhang, Jianqi4; Zhou, Yi5; Wei, Zhixiang4; Li, Yongfang1, 5; Janssen, Rene A. J.2, 3; Wang, Zhaohui1; Li, Weiwei1
刊名: JOURNAL OF MATERIALS CHEMISTRY A
发表日期: 2016
卷: 4, 期:20, 页:7736-7745
收录类别: SCI
英文摘要: A series of six diketopyrrolopyrrole (DPP) based conjugated polymers with a varying content of solubilizing perfluoroalkyl chains were synthesized. Based on a systematic investigation of the influence of the solvent on the photovoltaic performance, it is found that 1,6-diiodoperfluorohexane (IC6F12I) is an effective solvent additive to enhance the power conversion efficiency (PCE) of DPP polymers with perfluoroalkyl side chains. The polymers consist of thiazole-flanked DPP units that alternate along the main chain with varying ratios of thiophene (T) and perfluoroalkyl benzodithiophene (FBDT) units. The polymers possess high molecular weights, narrow band gaps and good crystalline properties. The DPP polymers were used as electron acceptors in bulk heterojunction solar cells with another DPP polymer as the electron donor. A solvent mixture of CHCl3 : 1-chloronaphthalene (1-CN) is found to provide the best PCE of 2.9% in non-fluorine based DPP polymer solar cells, but yields a low PCE of 0.52% for perfluoroalkyl-containing polymer solar cells. Perfluoroalkyl-containing polymer solar cells fabricated from CHCl3 with IC6F12I as the processing additive show a significantly improved PCE of 2.1%. The morphology analysis of the blend films reveals that IC6F12I as an additive improves the micro-phase separation between the polymer donor and acceptor, which results in enhanced charge generation.
语种: 英语
内容类型: 期刊论文
URI标识: http://ir.iccas.ac.cn/handle/121111/36116
Appears in Collections:有机固体实验室_期刊论文

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作者单位: 1.Chinese Acad Sci, Beijing Natl Lab Mol Sci, CAS Key Lab Organ Solids, Inst Chem, Beijing 10090, Peoples R China
2.Eindhoven Univ Technol, Mol Mat & Nanosyst, POB 513, NL-5600 MB Eindhoven, Netherlands
3.Eindhoven Univ Technol, Inst Complex Mol Syst, POB 513, NL-5600 MB Eindhoven, Netherlands
4.Chinese Acad Sci, Natl Ctr Nanosci & Technol, Beijing 100190, Peoples R China
5.Soochow Univ, Lab Adv Optoelect Mat, Coll Chem Chem Engn & Mat Sci, Suzhou 215123, Jiangsu, Peoples R China
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