Low bandgap polymers synthesized by FeCl(3) oxidative polymerization
Journal article, 2010
Four low bandgap polymers, combining an alkyl thiophene donor with benzo[c][1,2,5]thiadiazole, 2,3-diphenylquinoxaline, 2,3-diphenylthieno[3,4-b]pyrazine and 6,7-diphenyl-[1,2,5]thiadiazolo[3,4-g] quinoxaline acceptors in a donor-acceptor-donor architecture, were synthesized via FeCl3 oxidative polymerization. The molecular weights of the polymers were improved by introducing o-dichlor-obenzene (ODCB) as the reaction solvent instead of the commonly used solvent, chloroform. The photophysical, electrochemical and photovoltaic properties of the resulting polymers were investigated and compared. The optical bandgaps of the polymers vary between 1.0 and 1.9 eV, which is promising for solar cells. The devices spin-coated from an ODCB solution of P1DB:[70]PCBM showed a power conversion efficiency of 1.08% with an open-circuit voltage of 0.91 V and a short-circuit current density of 3.36 mA cm(-2) under irradiation from an AM1.5G solar simulator (100 mW cm(-2)). (C) 2010 Elsevier B.V. All rights reserved.
heterojunction photovoltaic cells
FeCl3 oxidative
Polymer solar cells
conjugated
thiophene
5]thiadiazole
units
polymerization
Benzo[c][1
2
gap polymer
polymers
benzothiadiazole
Bulk heterojunction
efficiency
performance
solar-cells
thienopyrazine
Low bandgap polymers
Author
Tianqi Cai
Chalmers, Chemical and Biological Engineering, Polymer Technology
East China University of Science and Technology
Y. Zhou
Linköping University
Ergang Wang
Chalmers, Chemical and Biological Engineering, Polymer Technology
Stefan Hellström
Chalmers, Chemical and Biological Engineering, Polymer Technology
Fengling Zhang
Linköping University
S. A. Xu
East China University of Science and Technology
Olle Inganäs
Linköping University
Mats Andersson
Chalmers, Chemical and Biological Engineering, Polymer Technology
Solar Energy Materials and Solar Cells
0927-0248 (ISSN)
Vol. 94 7 1275-1281Subject Categories
Chemical Sciences
DOI
10.1016/j.solmat.2010.03.024