Tuning joint sequence for donor-acceptor polymers based on fluorinated benzothiadiazole with thiophene/furan bridecakes

被引:11
作者
Wu, Feiyan [1 ]
Chen, Shuangying [1 ]
Chen, Lie [1 ,2 ]
Chen, Yiwang [1 ,2 ]
机构
[1] Nanchang Univ, Coll Chem, Inst Polymers, Nanchang 330031, Peoples R China
[2] Nanchang Univ, Jiangxi Prov Key Lab New Energy Chem, Nanchang 330031, Peoples R China
基金
中国国家自然科学基金;
关键词
Donor-acceptor polymers; Thiophene/furan bridges; Polymer solar cell; PHOTOVOLTAICS; MORPHOLOGY;
D O I
10.1016/j.polymer.2015.09.066
中图分类号
O63 [高分子化学(高聚物)];
学科分类号
070305 ; 080501 ; 081704 ;
摘要
Three new donoreacceptor (DeA) polymers, PTBDT-ffBT-FT12, PTBDT-ffBT-TT12 and PTBDT-ffBT-T12T, based on thiophene substituted benzene[1,2-b:4,5-b'] thiophene (TBDT) and fluorinated benzothiadiazole (ffBT) with thiophene/furan conjugated bridges were prepared. The joint sequence of alkyl thiophene/furan bridges has significant influence on the energy levels, band-gap and molecule stacking of the copolymers. All copolymers show broad absorption bands, and the energy level and band gap could be well fine-tuned by the introduction of thiophene/furan bridges to polymer backbone. The small atomic radius of oxygen atom on furan bridges resulted in the inferior co-planarity and torsion backbone for PTBDT-ffBT-FT12 with furan bridges, while the adjacent dodecyl on thiophene bridges close to TBDT led to a big steric hindrance. As a result, the polymer solar cell (PSC) based on PTBDT-ffBT-T12T achieves the better efficiency compared to PTBDT-ffBT-FT12 and PTBDT-ffBT-TT12. (C) 2015 Elsevier Ltd. All rights reserved.
引用
收藏
页码:154 / 160
页数:7
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