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Heejoo Kim, Byoung Hoon Lee, Kyu Cheol Lee, Geunjin Kim, Jin Young Yu, Nara Kim, Seoung Ho Lee and Kwanghee Lee Role of the Side Chain in the Phase Segregation of Polymer:Fullerene Bulk Heterojunction Composites Advanced Energy Materials 3

Version of Record online: 23 JUL 2013 | DOI: 10.1002/aenm.201300434

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The correlation between the geometrical structural change in push-pull π-conjugated polymers and the formation of phase segregation in their bulk heterojunction (BHJ) composite films is investigated. When substituted with large alkyl side chains, the polymer wires experience serious conformational distortion by increasing the torsion energy of dihedral angles along the backbone and undergo large-scale phase segregation in the BHJ composites.

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