期刊
ORGANIC ELECTRONICS
卷 11, 期 5, 页码 846-853出版社
ELSEVIER
DOI: 10.1016/j.orgel.2010.01.027
关键词
Bulk heterojunction organic solar cells; Low-bandgap polymer; 3-Hexylthiophene; Thiadiazoloquinoxaline
资金
- Ministry of Education, Science and Technology (MEST), Korea
- Direct For Mathematical & Physical Scien
- Division Of Materials Research [820506] Funding Source: National Science Foundation
Two different kinds of low-bandgap alternating copolymers consisting of 3-hexylthiophene and [1,2,5] thiadiazolo[3,4-g]quinoxaline were synthesized via the Stille coupling reaction. The copolymers show broad absorption band from visible to infrared region. The bandgaps (1.02-1.35 eV) of the copolymers are successfully tuned by changing the substituent on the acceptor unit. The copolymers are highly soluble in common organic solvents due to three 3-hexylthiophenes in the repeating unit. By optimizing the device parameters such as the blend ratio of copolymer to PCBM and the choice of processing solvent, the power conversion efficiency reaches as high as 1.27% under the standard solar radiation condition (AM 1.5G, 100 mW/cm(2)). (C) 2010 Elsevier B. V. All rights reserved.
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