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题名: Effect of Halogenation in Isoindigo-Based Polymers on the Phase Separation and Molecular Orientation of Bulk Heterojunction Solar Cells
作者: Zheng, Yu-Qing1;  Wang, Zhi1;  Dou, Jin-Hu1;  Zhang, Shi-Ding1;  Luo, Xu-Yi1;  Yao, Ze-Fan1;  Wang, Jie-Yu1;  Pei, Jian1
刊名: MACROMOLECULES
发表日期: 2015-08-25
DOI: 10.1021/acs.macromol.5b01074
卷: 48, 期:16, 页:5570-5577
收录类别: SCI
文章类型: Article
WOS标题词: Science & Technology ;  Physical Sciences
类目[WOS]: Polymer Science
研究领域[WOS]: Polymer Science
英文摘要: Fluorinated and chlorinated isoindigo-based polymers, F-IIDT and Cl-IIDT, were developed as the donor materials for photovoltaic cells. Although showing similar frontier orbital energy levels, both polymers exhibited distinct solar cell device performance, for example, power conversion efficiency of 4.60% for Cl-IIDT and 1.19% for F-IIDT. The investigation of photophysical properties demonstrated that the strong preaggregation of F-IIDT was formed in solution due to increased noncovalent interactions between the backbones of the polymer. Therefore, large crystal domains in blended thin films with no preferred crystallographic orientation were obtained. On the other hand, the introduction of chlorine atoms increased the torsional angle of the polymer backbone, resulting in reduced crystallization tendency. Films with less crystallinity and face-on polymer orientation contributed to better device performance of Cl-IIDT. Our research proved that the effects of halogenation are far more than the tuning of frontier energy levels. Phase separation in blended films, including size of the crystallized domains and molecular packing orientation, is also greatly influenced by halogenation.
关键词[WOS]: FIELD-EFFECT TRANSISTORS ;  ACCEPTOR CONJUGATED POLYMERS ;  OPEN-CIRCUIT VOLTAGE ;  PHOTOVOLTAIC PERFORMANCE ;  BENZODITHIOPHENE COPOLYMERS ;  ORGANIC SEMICONDUCTORS ;  MORPHOLOGY ;  FLUORINE ;  EFFICIENCY ;  MOBILITY
语种: 英语
WOS记录号: WOS:000360324400016
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/146501
Appears in Collections:中国科学院大连化学物理研究所_期刊论文

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作者单位: 1.Peking Univ, Beijing Natl Lab Mol Sci, Key Lab Bioorgan Chem & Mol Engn, Minist Educ,Ctr Soft Matter Sci & Engn,Coll Chem, Beijing 100871, Peoples R China

Recommended Citation:
Zheng, Yu-Qing,Wang, Zhi,Dou, Jin-Hu,et al. Effect of Halogenation in Isoindigo-Based Polymers on the Phase Separation and Molecular Orientation of Bulk Heterojunction Solar Cells[J]. MACROMOLECULES,2015,48(16):5570-5577.
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