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Utilizing n-type vanadium oxide films as hole-extracting layers for small molecule organic photovoltaics
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Hancox, Ian, Rochford, Luke A., Clare, D. (Dave), Sullivan, Paul J. and Jones, T. S. (Tim S.) (2011) Utilizing n-type vanadium oxide films as hole-extracting layers for small molecule organic photovoltaics. Applied Physics Letters, Vol.99 (No.1). Article 013304. doi:10.1063/1.3607478 ISSN 0003-6951.
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Official URL: http://dx.doi.org/10.1063/1.3607478
Abstract
We report increased cell performance for boron subphthalocyanine chloride (SubPc)/fullerene (C(60)) organic photovoltaic (OPV) cells when thermally evaporated vanadium oxide (V(2)O(X)) thin films are incorporated as a hole-extracting layer at the indium-tin oxide (ITO)/SubPc interface. Ultra-violet photoemission spectroscopy (UPS) studies of the V(2)O(X) films reveal highly n-type character, with a large work function of 6.8 eV. This correlates well with recently reported data for other metal oxide hole-extracting layers, such as molybdenum oxide and tungsten oxide, in contrast to the p-type character previously reported for V(2)O(X) films. There is significant improvement in energy level alignment for hole-extraction when cells utilise the V(2)O(X) layer at the ITO/SubPc interface, resulting in substantial increases in open circuit voltage (V(OC)) and power conversion efficiency (eta(p)).
Item Type: | Journal Article | ||||
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Subjects: | Q Science > QC Physics Q Science > QD Chemistry T Technology > TK Electrical engineering. Electronics Nuclear engineering |
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Divisions: | Faculty of Science, Engineering and Medicine > Science > Chemistry | ||||
Library of Congress Subject Headings (LCSH): | Vanadium oxide, Thin films, Photovoltaic power generation | ||||
Journal or Publication Title: | Applied Physics Letters | ||||
Publisher: | American Institute of Physics | ||||
ISSN: | 0003-6951 | ||||
Official Date: | 4 July 2011 | ||||
Dates: |
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Volume: | Vol.99 | ||||
Number: | No.1 | ||||
Page Range: | Article 013304 | ||||
DOI: | 10.1063/1.3607478 | ||||
Status: | Peer Reviewed | ||||
Publication Status: | Published | ||||
Funder: | Engineering and Physical Sciences Research Council (EPSRC), Asylum Research UK |
Data sourced from Thomson Reuters' Web of Knowledge
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