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Increased efficiency in small molecule organic photovoltaic cells through electrode modification with self-assembled monolayers
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Beaumont, Nicola L., Hancox, Ian, Sullivan, Paul J., Hatton, Ross A. and Jones, T. S. (Tim S.) (2011) Increased efficiency in small molecule organic photovoltaic cells through electrode modification with self-assembled monolayers. Energy & Environmental Science, Vol.4 (No.5). pp. 1708-1711. doi:10.1039/c1ee00005e ISSN 1754-5692.
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Official URL: http://dx.doi.org/10.1039/c1ee00005e
Abstract
We report that through the incorporation of polar self-assembled monolayers (SAMs) at the indium tin oxide (ITO)/donor interface in chloroaluminium phthalocyanine (ClAlPc)/C(60) discrete heterojunction organic photovoltaic (OPV) cells, the power conversion efficiency can be dramatically increased. This enhanced performance is due to better alignment between the hole-extracting electrode Fermi level and the highest occupied molecular orbital (HOMO) of the ClAlPc donor, as well as an improved surface compatibility which provides a more optimised electrode/donor interface. Optimised cells demonstrate an increase of similar to 85% in open circuit voltage which results in a near three-fold increase in power conversion efficiency from 1.3% to 3.3% under 1 sun illumination. Comparative studies are made using cells based on two other organic donor materials, copper phthalocyanine (CuPc) and boron sub-phthalocyanine (SubPc).
Item Type: | Journal Article | ||||
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Subjects: | Q Science > QD Chemistry | ||||
Divisions: | Faculty of Science, Engineering and Medicine > Science > Chemistry | ||||
Journal or Publication Title: | Energy & Environmental Science | ||||
Publisher: | Royal Society of Chemistry | ||||
ISSN: | 1754-5692 | ||||
Official Date: | May 2011 | ||||
Dates: |
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Volume: | Vol.4 | ||||
Number: | No.5 | ||||
Page Range: | pp. 1708-1711 | ||||
DOI: | 10.1039/c1ee00005e | ||||
Status: | Peer Reviewed | ||||
Publication Status: | Published | ||||
Access rights to Published version: | Restricted or Subscription Access | ||||
Funder: | Engineering and Physical Sciences Research Council (EPSRC), UK, under the SuperGen Excitonic Solar Cell Consortium and Advantage West Midlands Science City Materials Initiative , Royal Academy of Engineering/EPSRC , Asylum Research UK | ||||
Grant number: | 2 (EPSRC) |
Data sourced from Thomson Reuters' Web of Knowledge
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