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Shujiao Cai, Lie Chen, Daijun Zha and Yiwang Chen A novel planar D-A alternating copolymer with D-A integrated structures exhibiting H-aggregate behaviors for polymer solar cells Journal of Polymer Science Part A: Polymer Chemistry 51

Version of Record online: 31 OCT 2012 | DOI: 10.1002/pola.26411

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A novel copolymer PCBTBDT with architecture D-A integrated structure is developed. The planar D-A integrated structure favors the strong intermolecular interaction. The typical H-aggregation is beneficial for charge transportation and collection. The copolymer has a low-lying HOMO energy level of −5.41 eV and a broadened absorption. Without any treatment, the PCBTBDT exhibits efficiency of 2% and a relatively high Voc value of 0.77 V.

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