標題: | Synthesis of fluorinated benzotriazole (BTZ)- and benzodithiophene (BDT)-based low-bandgap conjugated polymers for solar cell applications |
作者: | Pola, Murali Krishna Boopathi, Karunakara Moorthy Padhy, Harihara Raghunath, Putikam Singh, Ashutosh Lin, Ming-Chang Chu, Chih-Wei Lin, Hong-Cheu 材料科學與工程學系 應用化學系 Department of Materials Science and Engineering Department of Applied Chemistry |
關鍵字: | Fluorine-substituted benzotriazole;Benzodithiophene;Donor-acceptor polymer;Bulk heterojunction solar cell;Low-bandgap polymer |
公開日期: | 四月-2017 |
摘要: | A series of donor acceptor (D-A) polymers (P1-P3) based on benzodithiophene (BDT) and electron- accepting benzotriazole (BTZ) units containing thiophene linkers with/without alkyl side-chains were designed and synthesized via Stille coupling polymerization method. The effects of polymers with multiple fluorinated BTZ groups on their thermal, optical, electrochemical, and photovoltaic properties were investigated. These polymers possessed the highest occupied molecular orbital (HOMO) levels ranged -5.38 to -5.6 eV and the lowest unoccupied molecular orbital (LUMO) levels ranged -3.55 to -3.57 eV, which covered broad absorption ranges with low optical bandgaps. The bulk heterojunction (BHJ) polymer solar cell (PSC) devices containing an active layer of D-A polymers blended with different weight ratios of electron-acceptor [6,6]-phenyl-C-71-butyric acid methyl ester (PC71BM) were explored under 100 mW cm(-2) of AM 1.5 white-light illumination, where the maximum power conversion efficiency (PCE) value of 3% (with J(sc) = 7.70 mA/cm(2), FF = 54.04, and V-oc = 0.72 V) was obtained in the PSC device consisting of polymer P3. (C) 2016 Elsevier Ltd. All rights reserved. |
URI: | http://dx.doi.org/10.1016/j.dyepig.2016.12.007 http://hdl.handle.net/11536/133126 |
ISSN: | 0143-7208 |
DOI: | 10.1016/j.dyepig.2016.12.007 |
期刊: | DYES AND PIGMENTS |
Volume: | 139 |
起始頁: | 349 |
結束頁: | 360 |
顯示於類別: | 期刊論文 |