標題: | Benzooxadiazole-based donor/acceptor copolymers imparting bulk-heterojunction solar cells with high open-circuit voltages |
作者: | Jiang, Jian-Ming Yang, Po-An Lan, Shang-Che Yu, Chia-Ming Wei, Kung-Hwa 材料科學與工程學系 Department of Materials Science and Engineering |
關鍵字: | Polymer solar cell;Suzuki coupling;Donor/acceptor conjugated polymers |
公開日期: | 8-一月-2013 |
摘要: | In this study we used Suzuki cross-coupling to synthesize three new donor/acceptor copolymers-PFTBO, PAF1130, and PCTBO-featuring soluble alkoxy-modified 2,1,3-benzooxadiazole (BO) moieties as acceptor units and electron-rich building blocks-dialkyl fluorene (F), alkylidene fluorene (AF), and carbazole (C), respectively-as donor units. These polymers, which we characterized using gel permeation chromatography, thermogravimetric analysis, NMR spectroscopy, UV-Vis absorption spectroscopy, and electrochemical cyclic voltammetry, exhibited good solubility, low-lying energy levels for their highest occupied molecular orbitals, excellent thermal stability, and air stability. Using these polymers, we fabricated bulk-heterojunction solar cell devices having the structure indium tin oxide/poly(3,4-ethylenedioxythiophene):polystyrenesulfonate/polymer:[6,6]-phenyl-C-61-butyric acid methyl ester (PC61BM) (1:1, w/w)/Ca/Al. Under AM 1.5G illumination (100 mW cm(-2)), the solar cell incorporating PFTBO exhibited a high value of V-OC of 1.04 V and that based on PCTBO provided a power conversion efficiency of 4.1% without the need for any post treatment. (C) 2012 Elsevier Ltd. All rights reserved. |
URI: | http://dx.doi.org/10.1016/j.polymer.2012.11.034 http://hdl.handle.net/11536/22416 |
ISSN: | 0032-3861 |
DOI: | 10.1016/j.polymer.2012.11.034 |
期刊: | POLYMER |
Volume: | 54 |
Issue: | 1 |
起始頁: | 155 |
結束頁: | 161 |
顯示於類別: | 期刊論文 |