標題: | Novel fluoride-substituted donor/acceptor polymers containing benzodithiophene and quinoxaline units for use in low-band gap solar cells |
作者: | Singh, Ashutosh Singh, Ravinder Lin, Chein-Min Pola, Murali Krishna Chang, Chiao-Kai Wei, Kung-Hwa Lin, Hong-Cheu 材料科學與工程學系 Department of Materials Science and Engineering |
關鍵字: | Donor/acceptor polymer;Low-band gap polymer;Fluoride-substituted polymer;Benzodithiophene;Quinoxaline;Stille polycondensation |
公開日期: | 九月-2016 |
摘要: | In this study we used Stille polycondensation to synthesize a series of low-band gap fluoride-substituted conjugated polymers containing electron-donating benzodithiophene (BDT) and electron-accepting quinoxaline (Qx) units, with the latter presenting either two or four fluoride atoms. These donor/acceptor polymers exhibited a broad absorption range (from 300 to 750 nm), with band gap energies of less than 1.20 eV (measured using cyclic voltammetry). Because of their strongly electron-donating thiophene units, the donor/acceptor polymers featuring the more highly fluorinated structures possessed the lowest band gaps (as low as 1.14 eV) and, thus, induced the greatest photovoltaic performance among these tested polymers. The highest power conversion efficiency (2.13%) was obtained from the polymer solar cell featuring an active layer of the polymer PTF2 blended with PC70BM (1:1.5, w/w), with a short-circuit current density, open circuit voltage, and fill factor of 8.7 mA cm(-2), 0.72 V, and 0.34, respectively. (C) 2016 Elsevier Ltd. All rights reserved. |
URI: | http://dx.doi.org/10.1016/j.eurpolymj.2016.03.025 http://hdl.handle.net/11536/134062 |
ISSN: | 0014-3057 |
DOI: | 10.1016/j.eurpolymj.2016.03.025 |
期刊: | EUROPEAN POLYMER JOURNAL |
Volume: | 82 |
起始頁: | 334 |
結束頁: | 346 |
顯示於類別: | 期刊論文 |