A weak donor/strong acceptor alternating copolymer for efficient bulk heterojunction solar cells
SCIE
SCOPUS
- Title
- A weak donor/strong acceptor alternating copolymer for efficient bulk heterojunction solar cells
- Authors
- Kim, YJ; Kim, HN; Hwang, MC; Kim, YH; Park, CE
- Date Issued
- 2014-12
- Publisher
- ELSEVIER SCIENCE SA
- Abstract
- A new alternating copolymer, CO-BDT-DTBT, designed with the "weak donor/strong acceptor" strategy has been synthesized and characterized. This strategy was tested by constructing a library of polymers employing alkanoyloxy-substituted benzodithiophene (BDT) as the weak donor, and benzothiadiazole (BT) as the strong acceptor. CO-BDT-DTBT has a low HOMO energy level of -5.62 eV, and as a result a BHJ device containing CO-BDT-DTBT blended with PC71BM was found to exhibit a high V-OC of 0.88 V. These findings confirm that "weak donor/strong acceptor" polymers are a promising new class of alternating copolymers for polymer solar cell applications. (C) 2014 Elsevier B.V. All rights reserved.
- Keywords
- Organic solar cells; Polymer solar cells; Weak-donor unit; Strong-acceptor unit; Conjugated polymer; LOW-BANDGAP POLYMERS; CONJUGATED POLYMERS; PERFORMANCE; BENZODITHIOPHENE; DESIGN; DIKETOPYRROLOPYRROLE; MOBILITY
- URI
- https://oasis.postech.ac.kr/handle/2014.oak/14116
- DOI
- 10.1016/J.SYNTHMET.2014.09.036
- ISSN
- 0379-6779
- Article Type
- Article
- Citation
- SYNTHETIC METALS, vol. 198, page. 93 - 100, 2014-12
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