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dc.contributor.author박소민-
dc.contributor.author윤영운-
dc.contributor.author전찬우-
dc.contributor.author김홍곤-
dc.contributor.author고민재-
dc.contributor.author이도권-
dc.contributor.author김진영-
dc.contributor.author손해정-
dc.contributor.author권순기-
dc.contributor.author김윤희-
dc.contributor.author김봉수-
dc.date.accessioned2015-12-03T01:22:24Z-
dc.date.available2015-12-03T01:22:24Z-
dc.date.issued201403-
dc.identifier.citationVOL 52, NO 6, 796-803-
dc.identifier.issn0887624X-
dc.identifier.other42830-
dc.identifier.urihttp://pubs.kist.re.kr/handle/201004/48378-
dc.description.abstractLow bandgap polymers with dithienylquinoxaline moieties based on 6H-phenanthro[1,10,9,8-cdefg]carbazole were synthesized via the Suzuki coupling reaction. Alkoxy groups were substituted at two different positions on the phenyl groups of the quinoxaline units of these polymers: in the para-position (PPQP) and in the meta-position (PPQM). The two polymers showed similar physical properties: broad absorption in the range of 400–700 nm, optical bandgaps of ∼1.8 eV, and the appropriate frontier orbital energy levels for efficient charge transfer/separation at polymer/PC71BM interfaces. However, the PPQM solar cell achieved a higher PCE due to its higher Jsc. Our investigation of the morphologies of the polymer:PC71BM blend films and theoretical calculations of the molecular conformations of the polymer chains showed that the polymer with the meta-positioned alkoxy group has better miscibility with PC71BM than the polymer with the para-positioned alkoxy group because the dihedral angle of its phenyl group with respect to the quinoxaline unit is higher. This higher miscibility resulted in a polymer:PC71BM blend film with a better morphology and thus in a higher PCE.-
dc.publisherJournal of polymer science Part A, Polymer chemistry-
dc.subjectLow bandgap-
dc.subjectpolymer solar cells-
dc.subjectquinoxaline-
dc.subjectpush-pull type copolymer-
dc.subjectpower conversion efficiency-
dc.subjectatomic force microscopy (AFM)-
dc.subjectconjugated polymers-
dc.subjectdegree of polymerization (DP)-
dc.subjectfullerenes-
dc.subjectgel permeation chromatography-
dc.titleSynthesis of phenanthro[1,10,9,8-cdefg]carbazole-based conjugated polymers for organic solar cell applications-
dc.typeArticle-
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