Issue 62, 2015

Novel donor–acceptor polymers based on 7-perfluorophenyl-6H-[1,2,5]thiadiazole[3,4-g]benzoimidazole for bulk heterojunction solar cells

Abstract

Three new fluorinated D–A type conjugated polymers based on a novel building unit 7-perfluorophenyl-6H-[1,2,5]thiadiazole[3,4-g]benzoimidazole have been synthesized through a Sitlle coupling reaction. The as-prepared polymers exhibit a narrow band gap (from 1.31 to 1.34 eV) and low lying energy levels with lowest occupied molecular orbital (LUMO) energy levels of −3.95, −3.97 and −4.15 eV, respectively. These polymers exhibit excellent solubility in common organic solvents due to the introduction of perfluorophenyl and long alkyl sidechains. The power conversion efficiency (PCE) of solar cells based on these as-prepared polymers and PC71BM could reach as high as 1.92%. Our results could provide a simple strategy for designing high performance D–A polymers based on this unit and a potential to further improve their performance.

Graphical abstract: Novel donor–acceptor polymers based on 7-perfluorophenyl-6H-[1,2,5]thiadiazole[3,4-g]benzoimidazole for bulk heterojunction solar cells

Article information

Article type
Paper
Submitted
02 Apr 2015
Accepted
01 Jun 2015
First published
01 Jun 2015

RSC Adv., 2015,5, 50137-50145

Author version available

Novel donor–acceptor polymers based on 7-perfluorophenyl-6H-[1,2,5]thiadiazole[3,4-g]benzoimidazole for bulk heterojunction solar cells

B. Hu, M. Li, W. Chen, X. Wan, Y. Chen and Q. Zhang, RSC Adv., 2015, 5, 50137 DOI: 10.1039/C5RA05849J

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