Low bandgap polymers synthesized by FeCl(3) oxidative polymerization
Artikel i vetenskaplig tidskrift, 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.

Benzo[c][1

2

benzothiadiazole

thiophene

efficiency

5]thiadiazole

solar-cells

Bulk heterojunction

heterojunction photovoltaic cells

conjugated

performance

FeCl3 oxidative

Low bandgap polymers

thienopyrazine

units

polymers

polymerization

gap polymer

Polymer solar cells

Författare

Tianqi Cai

East China University of Science and Technology

Chalmers

Y. Zhou

Linköpings universitet

Ergang Wang

Chalmers, Kemi- och bioteknik, Polymerteknologi

Stefan Hellström

Chalmers, Kemi- och bioteknik, Polymerteknologi

Fengling Zhang

Linköpings universitet

S. A. Xu

East China University of Science and Technology

Olle Inganäs

Linköpings universitet

Mats Andersson

Chalmers, Kemi- och bioteknik, Polymerteknologi

Solar Energy Materials and Solar Cells

0927-0248 (ISSN)

Vol. 94 7 1275-1281

Ämneskategorier

Kemi

DOI

10.1016/j.solmat.2010.03.024