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Role of the Side Chain in the Phase Segregation of Polymer:Fullerene Bulk Heterojunction Composites
Author(s) -
Kim Heejoo,
Lee Byoung Hoon,
Lee Kyu Cheol,
Kim Geunjin,
Yu Jin Young,
Kim Nara,
Lee Seoung Ho,
Lee Kwanghee
Publication year - 2013
Publication title -
advanced energy materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 10.08
H-Index - 220
eISSN - 1614-6840
pISSN - 1614-6832
DOI - 10.1002/aenm.201300434
Subject(s) - dihedral angle , materials science , side chain , polymer , fullerene , composite number , composite material , polymer solar cell , phase (matter) , conjugated system , torsion (gastropod) , heterojunction , nanotechnology , hydrogen bond , optoelectronics , molecule , organic chemistry , medicine , chemistry , surgery
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.