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Please use this identifier to cite or link to this item: http://hdl.handle.net/1942/22833

Title: A stability study of polymer solar cells using conjugated polymers with different donor or acceptor side chain patterns
Authors: Heckler, Ilona M.
Kesters, Jurgen
Defour, Maxime
Penxten, Huguette
Van Mele, Bruno
Maes, Wouter
Bundgaard, Eva
Issue Date: 2016
Publisher: ROYAL SOC CHEMISTRY
Citation: JOURNAL OF MATERIALS CHEMISTRY A, 4(42), p. 16677-16689
Abstract: Improvement of the power conversion efficiency and long term stability remains to be of crucial importance for the further development of polymer solar cells (PSCs). Herein, a donor-acceptor copolymer based on 4,8-di(thiophene-2'-yl)benzo[1,2-b:4,5-b']dithiophene (DTBDT) and 4,7-di(thiophene-2'-yl)benzo[c][1,2,5]thiadiazole (DTBT), specifically selected because of its suitability for roll-coating in the ambient environment, is investigated in terms of operational stability via partial exchange (5 or 10%) of the alkyl side chain on either the donor or the acceptor monomer with a 2-hydroxyethyl or 2-phenylethyl group. It is shown that the exchange of the hexyl chain on the DTBT moiety has a negative impact on the stability of the polymer as well as on the performance of the resulting PSCs. On the other hand, partial exchange of the 2-hexyldecyl side chain of the BDT unit by a 2-hydroxyethyl group results in an improved photochemical stability of the polymer film and a higher efficiency of 5.6% for the spin-coated PSC. The stability of roll-coated devices also slightly increases with the incorporation of 10% of either the 2-hydroxyethyl or 2-phenylethyl side chain.
Notes: [Heckler, Ilona M.; Bundgaard, Eva] Tech Univ Denmark, Dept Energy Convers & Storage, Frederiksborgvej 399, DK-4000 Roskilde, Denmark. [Kesters, Jurgen; Penxten, Huguette; Maes, Wouter] Hasselt Univ, Inst Mat Res IMO IMOMEC, DSOS, Agoralaan 1,Bldg D, B-3590 Diepenbeek, Belgium. [Defour, Maxime; Van Mele, Bruno] Vrije Univ Brussels, Phys Chem & Polymer Sci FYSC, Pl Laan 2, B-1050 Brussels, Belgium.
URI: http://hdl.handle.net/1942/22833
DOI: 10.1039/c6ta07244e
ISI #: 000387166900048
ISSN: 2050-7488
Category: A1
Type: Journal Contribution
Validation: ecoom, 2017
Appears in Collections: Research publications

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