https://scholars.lib.ntu.edu.tw/handle/123456789/504214
標題: | New donor–acceptor copolymers with ultra-narrow band gap for photovoltaic application | 作者: | Keshtov, M.L. Godovskii, D.Y. Kuklin, S.A. Wang, L. Konstantinov, I.O. Krayushkin, M.M. Khokhlov, A.R. |
公開日期: | 2016 | 出版社: | Maik Nauka Publishing / Springer SBM | 卷: | 470 | 期: | 2 | 起(迄)頁: | 283-288 | 來源出版物: | Doklady Chemistry | 摘要: | Two novel donor–acceptor (D–A) copolymers P1 and P2 with the thiazoloquinoxaline repeating acceptor moiety and different donor moieties of benzo[1,2-b:4,5-b']dithiophene and isomeric benzo[2,1-b:3,4-b']dithiophene have been prepared. The polymers show light absorption at 300–1200 nm and a band gap width of 0.98 and 1.14 eV, respectively. The energies of the HOMO (–5.42 and–5.29 eV) and LUMO (–3.90 and–3.83 eV) levels of polymers P1 and P2 have been determined. The absorption maximum for polymer P1 in the long-wavelength region is red-shifted by 161 nm, which is caused by stronger charge transfer in P1 as compared with P2. This fact indicates that the benzo[1,2-b:4,5-b']dithiophene structural moiety has a higher electron-donating ability than the benzo[2,1-b:3,4-b']dithiophene moiety. The red shift of the absorption spectrum of polymer P1 in comparison with that of P2 indicates that interchain π–π stacking interactions are more efficient in P1 than in P2. © 2016, Pleiades Publishing, Ltd. |
URI: | https://scholars.lib.ntu.edu.tw/handle/123456789/504214 | ISSN: | 00125008 | DOI: | 10.1134/S0012500816100013 |
顯示於: | 凝態科學研究中心 |
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