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A Soluble High Molecular Weight Copolymer of Benzo[1,2‐b:4,5‐b′]dithiophene and Benzoxadiazole for Efficient Organic Photovoltaics
Author(s) -
Nie Wanyi,
MacNeill Christopher M.,
Li Yuan,
Noftle Ronald E.,
Carroll David L.,
Coffin Robert. C.
Publication year - 2011
Publication title -
macromolecular rapid communications
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.348
H-Index - 154
eISSN - 1521-3927
pISSN - 1022-1336
DOI - 10.1002/marc.201100161
Subject(s) - chlorobenzene , copolymer , dispersity , organic solar cell , materials science , polymer chemistry , solvent , polymer , energy conversion efficiency , chemical engineering , chemistry , organic chemistry , catalysis , optoelectronics , engineering
The synthesis and characterization of a soluble high molecular weight copolymer based on 4,8‐ bis (1‐pentylhexyloxy)benzo[1,2‐ b :4,5‐ b ′]dithiophene and 2,1,3‐benzoxadiazole is presented. High efficiency organic photovoltaic (OPV) devices comprised of this polymer and phenyl‐C 71 ‐butyric acid methyl ester (PC 71 BM) were fabricated by additive processing with 1‐chloronapthalene (CN). When the active layer is cast from pristine chlorobenzene (CB), power conversion efficiencies (PCEs) average 1.41%. Our best condition—using 2% chloronapthalene as a solvent additive in CB—results in an average PCE of 5.65%, with a champion efficiency of 6.05%.