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Jianyu Yuan, Zhichun Zhai, Huilong Dong, Jing Li, Zuoquan Jiang, Youyong Li and Wanli Ma Efficient Polymer Solar Cells with a High Open Circuit Voltage of 1 Volt Advanced Functional Materials 23

Version of Record online: 17 SEP 2012 | DOI: 10.1002/adfm.201201535

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A large-bandgap material for polymer tandem solar cells is designed by modifying a series of polymers containing a BDT-TPD backbone by the incorporation of different alkylthienyl side chains. Experimental results and theoretical calculations prove that the size and topology of the alkyl chains can fine-tune the polymer solubility, highest occupied molecular orbital energy level, and intermolecular packing by affecting the molecular coplanarity.

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