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Organic photovoltaic devices based on water-soluble copper phthalocyanine
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Schumann, Stefan, Hatton, Ross A. and Jones, T. S. (Tim S.) (2011) Organic photovoltaic devices based on water-soluble copper phthalocyanine. Journal of Physical Chemistry C, Volume 115 (Number 11). pp. 4916-4921. doi:10.1021/jp109544m ISSN 1932-7447.
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Official URL: http://dx.doi.org/10.1021/jp109544m
Abstract
Organic photovoltaic (OPV) planar heterojunction devices based on an aqueous solution processed 3,4',4 '',4'"1-copper(II) phthalocyanine-tetrasulfonic acid tetrasodium salt (TSCuPc) donor layer and a fullerene (C(60)) acceptor have been fabricated demonstrating power conversion efficiencies of up to 0.32% and an open circuit voltage (V(OC)) of almost 0.6 V. The V(OC) is significantly larger than that produced by similar cells based on the commonly studied copper phthalocyanine (CuPc)/C(60) heterojunction (V(OC) = 0.46 V). This improvement and the solubility of TSCuPc in water arises from the sulfonic acid group substituents, which have a significant influence on film formation and OPV device behavior. In contrast to other solution-processed molecular semiconductors, TSCuPc forms nanocrystals in solution resulting in dense crystal thin film networks on the substrate surface. This unusual thin film morphology was studied in detail using ultraviolet-visible absorption spectroscopy, X-ray diffraction, and atomic force microscopy. Combined with current density-voltage analysis under I sun solar illumination, a deeper understanding of the molecular arrangement of TSCuPc thin films is presented as well as its impact on the resulting device behavior.
Item Type: | Journal Article | ||||
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Subjects: | Q Science > QC Physics Q Science > QD Chemistry |
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Divisions: | Faculty of Science, Engineering and Medicine > Science > Chemistry | ||||
Library of Congress Subject Headings (LCSH): | Phthalocyanines, Photovoltaic power systems, Thin films, Semiconductors, Exciton theory | ||||
Journal or Publication Title: | Journal of Physical Chemistry C | ||||
Publisher: | American Chemical Society | ||||
ISSN: | 1932-7447 | ||||
Official Date: | 24 March 2011 | ||||
Dates: |
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Volume: | Volume 115 | ||||
Number: | Number 11 | ||||
Page Range: | pp. 4916-4921 | ||||
DOI: | 10.1021/jp109544m | ||||
Status: | Peer Reviewed | ||||
Publication Status: | Published | ||||
Access rights to Published version: | Restricted or Subscription Access | ||||
Funder: | BP Solar (Firm), Engineering and Physical Sciences Research Council (EPSRC), Royal Academy of Engineering (Great Britain), Advantage West Midlands (AWM), European Regional Development Fund (ERDF) |
Data sourced from Thomson Reuters' Web of Knowledge
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