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Highly efficient and reproducible nonfullerene solar cells from hydrocarbon solvents

Title: Highly efficient and reproducible nonfullerene solar cells from hydrocarbon solvents
Authors: Wadsworth, A
Ashraf, RS
Abdelsamie, M
Pont, S
Little, M
Moser, M
Hamid, Z
Neophytou, M
Zhang, W
Amassian, A
Durrant, JR
Baran, D
McCulloch, I
Item Type: Journal Article
Abstract: With chlorinated solvents unlikely to be permitted for use in solution-processed organic solar cells in industry, there must be a focus on developing nonchlorinated solvent systems. Here we report high-efficiency devices utilizing a low-bandgap donor polymer (PffBT4T-2DT) and a nonfullerene acceptor (EH-IDTBR) from hydrocarbon solvents and without using additives. When mesitylene was used as the solvent, rather than chlorobenzene, an improved power conversion efficiency (11.1%) was achieved without the need for pre- or post-treatments. Despite altering the processing conditions to environmentally friendly solvents and room-temperature coating, grazing incident X-ray measurements confirmed that active layers processed from hydrocarbon solvents retained the robust nanomorphology obtained with hot-processed chlorinated solvents. The main advantages of hydrocarbon solvent-processed devices, besides the improved efficiencies, were the reproducibility and storage lifetime of devices. Mesitylene devices showed better reproducibility and shelf life up to 4000 h with PCE dropping by only 8% of its initial value.
Issue Date: 1-Jun-2017
Date of Acceptance: 1-Jun-2017
URI: http://hdl.handle.net/10044/1/50590
DOI: https://dx.doi.org/10.1021/acsenergylett.7b00390
ISSN: 2380-8195
Publisher: American Chemical Society
Start Page: 1494
End Page: 1500
Journal / Book Title: ACS Energy Letters
Volume: 2
Issue: 7
Copyright Statement: © 2017 American Chemical Society
Sponsor/Funder: Commission of the European Communities
Commission of the European Communities
Engineering and Physical Sciences Research Council
Engineering and Physical Sciences Research Council
Funder's Grant Number: 610115
643791
EP/G037515/1
EP/L016702/1
Keywords: Science & Technology
Physical Sciences
Technology
Chemistry, Physical
Electrochemistry
Energy & Fuels
Nanoscience & Nanotechnology
Materials Science, Multidisciplinary
Chemistry
Science & Technology - Other Topics
Materials Science
ORGANIC PHOTOVOLTAICS
CONJUGATED POLYMERS
BANDGAP POLYMER
ACCEPTOR
MORPHOLOGY
STABILITY
CAST
GAP
DEGRADATION
FABRICATION
Publication Status: Published
Appears in Collections:Chemistry
Faculty of Natural Sciences



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