期刊
MACROMOLECULES
卷 44, 期 15, 页码 5994-6001出版社
AMER CHEMICAL SOC
DOI: 10.1021/ma102943g
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资金
- Converging Research Center through the Ministry of Education, Science and Technology [2010K000970]
- Korea Energy Management Corporation (KEMCO), Republic of Korea [2008-N-PV08-02]
A series of quinoxaline-based copolymers, namely, poly[N-9 ''-heptadecanyl-2,7-carbazole-alt-5,5-(5',8'-di-2-thienyl-quinoxaline)] (P1), poly[N-9 ''-heptadecanyl-2,7-carbazole-alt-5,5- (5',8'-di-2-thienyl-2,3-bis (4-octyloxyl)phenyl)quinoxaline] (P2), and poly[N-9 ''-heptadecanyl-2,7-carbazole-alt-5,5-(5',8'-di-2-thienyl-2,3-bis(4-(3,7-dimethyloctyloxy)pheny)quinoxaline] (P3), were synthesized and characterized for use in polymer solar cells (PSCs). We describe the effect of modifying the alkyl group of the side chain of the quinoxaline derivatives on the electronic and optoelectronic properties of the polymers. The field-effect hole mobility as well as the electronic energy levels and processability of the materials for PSC applications were investigated. Among the studied quinoxaline-based copolymers, P2 showed the best photovoltaic performance with an open-circuit voltage (V-OC) of 0.82 V, a short-circuit current density (J(SC)) of 9.96 mA/cm(2), a fill. factor (FF) of 0.49, and a power-conversion efficiency of 4.0% when a P2/PC71BM blend film was used as the active layer under AM 1.5 G irradiation (100 mW/cm(2)).
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