title: High-efficiency large-bandgap material for polymer solar cells.
abstract: High-molecular-weight conjugated polymer HD-PDFC-DTBT with N-(2-hexyldecyl)-3,6-difluorocarbazole as the donor unit, 5,6-bis(octyloxy)benzothiadiazole as the acceptor unit, and thiophene as the spacer is synthesized by Suzuki polycondensation. HD-PDFC-DTBT shows a large bandgap of 1.96 eV and a high hole mobility of 0.16 cm(2) V(-1) s(-1) . HD-PDFC-DTBT:PC71 BM-based inverted polymer solar cells (PSCs) give a power conversion efficiency (PCE) of 7.39% with a Voc of 0.93 V, a Jsc of 14.11 mA cm(-2) , and an FF of 0.56.
authors.affiliation: Beijing Key Laboratory of Energy Conversion and Storage Materials, College of Chemistry, Beijing Normal University, Beijing, 100875, China.
authors.forename: Hedi
authors.initials: H
authors.lastname: Wei
authors.forename: Yi-Hsiang
authors.initials: YH
authors.lastname: Chao
authors.forename: Chong
authors.initials: C
authors.lastname: Kang
authors.forename: Cuihong
authors.initials: C
authors.lastname: Li
authors.forename: Heng
authors.initials: H
authors.lastname: Lu
authors.forename: Xue
authors.initials: X
authors.lastname: Gong
authors.forename: Huanli
authors.initials: H
authors.lastname: Dong
authors.forename: Wenping
authors.initials: W
authors.lastname: Hu
authors.forename: Chain-Shu
authors.initials: CS
authors.lastname: Hsu
authors.forename: Zhishan
authors.initials: Z
authors.lastname: Bo
mesh_terms: D002227:Carbazoles / Q000737:chemistry*; D011211:Electric Power Supplies; D058105:Polymerization; D011108:Polymers / Q000737:chemistry*; D012993:Solar Energy; D013472:Sunlight; D013830:Thiadiazoles / Q000737:chemistry; D013876:Thiophenes / Q000737:chemistry*
chemical_list: D002227:Carbazoles; D011108:Polymers; D013830:Thiadiazoles; D013876:Thiophenes; C015700:benzo-1,2,3-thiadiazole
keywords: conjugated polymers; donor materials; solar cells; wide-bandgap materials