Quinoxaline-based π-conjugated donor polymer for highly efficient organic thin-film solar cells
- 3 August 2009
- journal article
- research article
- Published by AIP Publishing in Applied Physics Letters
- Vol. 95 (5), 053701
- https://doi.org/10.1063/1.3202393
Abstract
A quinoxaline-based π -conjugated donor polymer, poly[2,7-(9,9-dioctylfluorene)-alt-5,5-( 5 ′ , 8 ′ -di-2-thienyl- 2 ′ , 3 ′ -diphenylquinoxaline)] (N-P7), was synthesized to achieve a high power conversion efficiency (PCE) of bulk heterojunction (BHJ)-based solar cells. The optical band-gap and highest occupied molecular orbital level of N-P7 were 1.95 and −5.37 eV, respectively. BHJ-based solar cells using N-P7 as a donor and phenyl C 71 butyric acid methyl ester as an acceptor gave a PCE as high as 5.5% under AM 1.5G 100 mW / cm 2 illumination. We also investigated the effects of substituent groups of quinoxaline-based polymers on the morphology of the BHJ layer.Keywords
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