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Investigating the reduction in the absorption intensity of P 3 HT in polymer/fullerene “bilayers” coated using orthogonal solvents
Author(s) -
Zhang Chunmei,
Hu Yufeng,
Tang Aiwei,
Deng Zhenbo,
Teng Feng
Publication year - 2015
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.41757
Subject(s) - materials science , bilayer , crystallinity , polymer , dichloromethane , chemical engineering , fullerene , absorption (acoustics) , polymer chemistry , coating , organic chemistry , membrane , chemistry , composite material , solvent , biochemistry , engineering
We investigated the reduction in the absorption intensity of poly(3‐hexylthiophene) (P3HT) in a poly(3‐hexylthiophene)/(6,6)‐phenyl‐C 61 ‐butyric acid methyl ester (P3HT/PCBM) “bilayer” heterojunction film that was fabricated using orthogonal solvents. The results show that even though P3HT is insoluble in dichloromethane (DCM), DCM could decrease the chain packing and the crystallinity of the P3HT film by the swelling effect. DCM also assists in the penetration of the PCBM into the P3HT underlayer during spin‐coating. After the DCM evaporates, the PCBM in the P3HT matrix hinders the self‐reorganization of P3HT, causing a drop in the absorption intensity of P3HT. © 2014 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2015 , 132 , 41757.