Tuning the Donor–Acceptor Strength of Low-Bandgap Platinum-Acetylide Polymers for Near-Infrared Photovoltaic Applications
✍ Scribed by Chuanjiang Qin; Yingying Fu; Chung-Hin Chui; Chi-Wai Kan; Zhiyuan Xie; Lixiang Wang; Wai-Yeung Wong
- Publisher
- John Wiley and Sons
- Year
- 2011
- Tongue
- English
- Weight
- 219 KB
- Volume
- 32
- Category
- Article
- ISSN
- 1022-1336
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✦ Synopsis
Abstract
Two near‐infrared (NIR) absorbing metallopolyynes of platinum (P1 and P2) functionalized with a weakly electron‐donating fluorene unit and two strong electron acceptors (viz. benzo[1,2‐c:4,5‐c′]bis([1,2,5]thiadiazole) and [1,2,5]thiadiazolo[3,4‐i]dibenzo[a,c]phenazine) were synthesized and applied for NIR photovoltaic applications. With these designed weak donor–strong acceptor electronic traits, these metallopolymers possess narrow bandgaps of 1.54 and 1.65 eV and a low HOMO level of about 5.50 eV, thus inducing a power conversion efficiency up to 1% for bulk heterojunction solar cells at the NIR wavelength.
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