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