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Proceedings Paper

Slow charge recombination at a dye-sensitized nanocrystalline TiO2/organic semiconductor heterojunction employing Al2O3 coatings
Author(s): Saif A Haque; Emilio Palomares; Cigang Xu; Robert J. Potter; Andrew B. Holmes; James R. Durrant
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Paper Abstract

Control of charge interfacial charge transfer is central to the design of photovoltaic devices. We report herein the application of insulating metal oxide blocking layers to control the charge recombination kinetics at a solid-state dye sensitised nanocrystalline inorganic/organic semiconductor interface. We show that the conformal growth of a ~1 nm thick overlayer of Al2O3 on a preformed nanocrystalline TiO2 film results in a ~3-fold retardation in the rate of charge recombination at such an interface. This observation shows a good correlation with the current/voltage characteristics of dye sensitized nanocrystalline solar cells fabricated from such films, with the Al2O3 coating resulting in a 40% improvement in overall device efficiency

Paper Details

Date Published: 6 February 2004
PDF: 7 pages
Proc. SPIE 5215, Organic Photovoltaics IV, (6 February 2004); doi: 10.1117/12.505789
Show Author Affiliations
Saif A Haque, Imperial College of Science, Technology, and Medicine (United Kingdom)
Emilio Palomares, Imperial College of Science, Technology, and Medicine (United Kingdom)
Cigang Xu, Imperial College of Science, Technology, and Medicine (United Kingdom)
Robert J. Potter, Johnson Matthey Technology Ctr. (United Kingdom)
Andrew B. Holmes, Univ. of Cambridge (United Kingdom)
James R. Durrant, Imperial College of Science, Technology, and Medicine (United Kingdom)


Published in SPIE Proceedings Vol. 5215:
Organic Photovoltaics IV
Zakya H. Kafafi; Paul A. Lane, Editor(s)

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