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A weak donor/strong acceptor alternating copolymer for efficient bulk heterojunction solar cells
- Kim, Yu Jin;
- Kim, Hyoung Nam;
- Hwang, Moon-Chan;
- Kim, Yun-Hi;
- Park, Chan Eon
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11초록
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.
키워드
Organic solar cells; Polymer solar cells; Weak-donor unit; Strong-acceptor unit; Conjugated polymer; CONJUGATED POLYMERS; BANDGAP; PERFORMANCE; BENZODITHIOPHENE; DESIGN; DIKETOPYRROLOPYRROLE; MOBILITY
- 제목
- A weak donor/strong acceptor alternating copolymer for efficient bulk heterojunction solar cells
- 저자
- Kim, Yu Jin; Kim, Hyoung Nam; Hwang, Moon-Chan; Kim, Yun-Hi; Park, Chan Eon
- 발행일
- 2014-12
- 유형
- Article
- 저널명
- Synthetic Metals
- 권
- 198
- 페이지
- 93 ~ 100