DICP OpenIR
Effect of Halogenation in Isoindigo-Based Polymers on the Phase Separation and Molecular Orientation of Bulk Heterojunction Solar Cells
Zheng, Yu-Qing; Wang, Zhi; Dou, Jin-Hu; Zhang, Shi-Ding; Luo, Xu-Yi; Yao, Ze-Fan; Wang, Jie-Yu; Pei, Jian
Source PublicationMACROMOLECULES
2015-08-25
DOI10.1021/acs.macromol.5b01074
Volume48Issue:16Pages:5570-5577
Indexed BySCI
SubtypeArticle
WOS HeadingsScience & Technology ; Physical Sciences
WOS SubjectPolymer Science
WOS Research AreaPolymer Science
WOS KeywordFIELD-EFFECT TRANSISTORS ; ACCEPTOR CONJUGATED POLYMERS ; OPEN-CIRCUIT VOLTAGE ; PHOTOVOLTAIC PERFORMANCE ; BENZODITHIOPHENE COPOLYMERS ; ORGANIC SEMICONDUCTORS ; MORPHOLOGY ; FLUORINE ; EFFICIENCY ; MOBILITY
AbstractFluorinated 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.
Language英语
WOS IDWOS:000360324400016
Citation statistics
Document Type期刊论文
Identifierhttp://cas-ir.dicp.ac.cn/handle/321008/146501
Collection中国科学院大连化学物理研究所
AffiliationPeking 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
GB/T 7714
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.
APA Zheng, Yu-Qing.,Wang, Zhi.,Dou, Jin-Hu.,Zhang, Shi-Ding.,Luo, Xu-Yi.,...&Pei, Jian.(2015).Effect of Halogenation in Isoindigo-Based Polymers on the Phase Separation and Molecular Orientation of Bulk Heterojunction Solar Cells.MACROMOLECULES,48(16),5570-5577.
MLA Zheng, Yu-Qing,et al."Effect of Halogenation in Isoindigo-Based Polymers on the Phase Separation and Molecular Orientation of Bulk Heterojunction Solar Cells".MACROMOLECULES 48.16(2015):5570-5577.
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