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Yue Wu, Zhaojun Li, Wei Ma, Ye Huang, Lijun Huo, Xia Guo, Maojie Zhang, Harald Ade and Jianhui Hou PDT-S-T: A New Polymer with Optimized Molecular Conformation for Controlled Aggregation and π–π Stacking and Its Application in Efficient Photovoltaic Devices Advanced Materials 25

Version of Record online: 21 MAY 2013 | DOI: 10.1002/adma.201301174

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The correlation among molecular conformation, the crystallinity of the morphology, propensity for ππ stacking, J- versus H-aggregation, and photovoltaic performance have been studied based on two newly designed polymers, PBDTTT-S-T and PDT-S-T. The results show that more linear backbone structure is helpful to improve photovoltaic properties of the polymer, and therefore, molecular conformation should be considered for molecular design of photovoltaic polymers.

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