A Soluble High Molecular Weight Copolymer of Benzo[1,2-b:4,5-b′]dithiophene and Benzoxadiazole for Efficient Organic Photovoltaics

作者：Nie, Wanyi; MacNeill, Christopher M.; Li, Yuan; Noftle, Ronald E.; Carroll, David L.; Coffin, Robert. C.^*

来源：Macromolecular Rapid Communications, 2011, 32(15): 1163-1168.

DOI：10.1002/marc.201100161

• conjugated polymers
• photovoltaics
• synthesis

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 (PC71BM) 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%.

• 出版日期2011-8-3