期刊
ORGANIC ELECTRONICS
卷 21, 期 -, 页码 216-222出版社
ELSEVIER
DOI: 10.1016/j.orgel.2015.03.019
关键词
Organic photovoltaics; Non-halogenated; Halogen free solvent; PCDTBT; Polymer photovoltaics
资金
- UK EPSRC [EP/I02864/1, EP/J017361/1]
- King Abdulaziz University [D-004/431]
- EPSRC [EP/J017361/1] Funding Source: UKRI
- Engineering and Physical Sciences Research Council [EP/J017361/1] Funding Source: researchfish
The development of processing routes to fabricate organic photovoltaic devices (OPVs) using non-halogenated solvents is a necessary step towards their eventual commercialisation. To address this issue, we have used Hansen solubility parameter analysis to identify a non-halogenated solvent blend based on a mixture of carbon disulphide and acetone. This solvent blend was then used to deposit a donor-acceptor polymer-fullerene thin-film that was then used as the active layer of bulk-heterojunction OPV. For the benchmark polymer: fullerene system PCDTBT:PC70BM, a power conversion efficiency of 6.75% was achieved; a 20% relative improvement over reference cells processed using the chlorinated-solvent chlorobenzene. Improvements in device efficiency are attributed to an increase in electron and hole conductivity resulting from enhanced fullerene crystallisation; a property that leads to enhanced device efficiency through improved charge extraction. (C) 2015 Elsevier B.V. All rights reserved.
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