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Please use this identifier to cite or link to this item: http://hdl.handle.net/1942/25060

Title: Low bandgap polymers based on bay-annulated indigo for organic photovoltaics: Enhanced sustainability in material design and solar cell fabrication
Authors: Brebels, Jeroen
Klider, Karine C. C. W. S.
Kelchtermans, Mathias
Verstappen, Pieter
Van Landeghem, Melissa
Van Doorslaer, Sabine
Goovaerts, Etienne
Garcia, Jarem R.
Manca, Jean
Lutsen, Laurence
Vanderzande, Dirk
Maes, Wouter
Issue Date: 2017
Citation: ORGANIC ELECTRONICS, 50, p. 264-272
Abstract: Although research in the field of organic photovoltaics (OPV) still merely focuses on efficiency, efforts to increase the sustainability of the production process and the materials encompassing the device stack are of equally crucial importance to fulfil the promises of a truly renewable source of energy. In this study, a number of steps in this direction are taken. The photoactive polymers all contain an electron-deficient building block inspired on the natural indigo dye, bay-annulated indigo, combined with electron-rich thiophene and 4H-dithieno[3,2-b: 2',3'-d] pyrrole units. The synthetic protocol (starting from indigo) is optimized and the final materials are thoroughly analyzed. MALDI-TOF mass spectrometry provides detailed information on the structural composition of the polymers. Best solar cell efficiencies are obtained for polymer: fullerene blends spin-coated from a pristine non-halogenated solvent (o-xylene), which is highly recommended to reduce the ecological footprint of OPV and is imperative for large scale production and commercialization. (C) 2017 Elsevier B. V. All rights reserved.
Notes: [Brebels, Jeroen; Klider, Karine C. C. W. S.; Kelchtermans, Mathias; Verstappen, Pieter; Vanderzande, Dirk; Maes, Wouter] UHasselt Hasselt Univ, Inst Mat Res IMO IMOMEC, DSOS, Agoralaan, B-3590 Diepenbeek, Belgium. [Klider, Karine C. C. W. S.; Garcia, Jarem R.] State Univ Ponta Grossa UEPG, Chem Dept, Av Gal Carlos Cavalcanti 4748, BR-84030900 Ponta Grossa, PR, Brazil. [Van Landeghem, Melissa; Van Doorslaer, Sabine; Goovaerts, Etienne] Univ Antwerp, Phys Dept, Univ Pl 1, B-2610 Antwerp, Belgium. [Manca, Jean] UHasselt Hasselt Univ, X LAB, Agoralaan, B-3590 Diepenbeek, Belgium. [Lutsen, Laurence; Vanderzande, Dirk; Maes, Wouter] IMEC, Associated Lab IMOMEC, Wetenschapspk 1, B-3590 Diepenbeek, Belgium.
URI: http://hdl.handle.net/1942/25060
DOI: 10.1016/j.orgel.2017.07.037
ISI #: 000411766800036
ISSN: 1566-1199
Category: A1
Type: Journal Contribution
Appears in Collections: Research publications

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