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A benzodithiophene-thienothiophene derivative with cyano acrylate side chain: A novel donor polymer with deep HOMO level for p-n heterojunction solar cells
- Issue Date
- Mar-2016
- Publisher
- Elsevier Sequoia
- Keywords
- Organic solar cell; Bulk heterojunction solar cell; Conjugated donor polymer; Power conversion efficiency; Open circuit voltage
- Citation
- Thin Solid Films, v.603, pp 165 - 172
- Pages
- 8
- Indexed
- SCI
SCIE
SCOPUS
- Journal Title
- Thin Solid Films
- Volume
- 603
- Start Page
- 165
- End Page
- 172
- ISSN
- 0040-6090
- Abstract
- A new promising benzodithiophene and thienothiophene-based copolymer with cyano acrylate side chain, BDT8TT, has been designed and synthesized for efficient bulk heterojunction solar cells. The copolymer shows good solubility and film-forming ability combining with excellent thermal stability. Furthermore, BDT8TT displays a broad absorption in the near-IR region (from 300 to 1000 nm). Specially, this conjugated polymer exhibits quite high open circuit voltage by a highly deep-lying HOMO level at -5.76 eV. Good power conversion efficiencies are demonstrated in solar cell studies; the polymer solar cell was fabricated from the blend of the polymer as a donor and PC71BM as an acceptor without annealing and any additives. (C) 2016 Elsevier B.V. All rights reserved.
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