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Electron Transport and Recombination in Dye Sensitized Solar Cells Fabricated from Obliquely Sputter Deposited and Thermally Annealed TiO2 Films
Department of Physics, University of Nairobi.
Department of Physics, University of Nairobi.
Department of Physics, University of Nairobi.
Uppsala University, Disciplinary Domain of Science and Technology, Technology, Department of Engineering Sciences, Solid State Physics.
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2007 (English)In: Journal of Electroanalytical Chemistry, ISSN 0022-0728, E-ISSN 1873-2569, Vol. 605, no 2, 151-156 p.Article in journal (Refereed) Published
Abstract [en]

Dye sensitized solar cells based on annealed titanium dioxide films prepared by oblique reactive DC magnetron sputtering have been investigated in detail. Electron transport and recombination were studied using intensity-modulated photocurrent and photovoltage spectroscopy. Electron transport time as well as lifetime were found to increase upon lowering of the light intensity and to increase upon increasing the thickness of the TiO2 film. The properties are very similar to those observed for solar cells based on colloidal TiO2 films despite the morphologies being very different. In all cases, films are composed of a porous assembly of TiO2 nanocrystals. Grain boundaries with associated trap and/or energy barriers may explain the observed transport properties.

Place, publisher, year, edition, pages
2007. Vol. 605, no 2, 151-156 p.
Keyword [en]
Nanostructured TiO2, Mesoporous materials, Reactive sputtering, Electron trapping
National Category
Chemical Sciences Engineering and Technology
Identifiers
URN: urn:nbn:se:uu:diva-14459DOI: 10.1016/j.jelechem.2007.04.001ISI: 000248167500009OAI: oai:DiVA.org:uu-14459DiVA: diva2:42229
Available from: 2011-09-21 Created: 2008-01-30 Last updated: 2017-12-11Bibliographically approved

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