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Effect of the Preparation Procedure on the Morphology of Thin TiO2 Films and Their Device Performance in Small-Molecule Bilayer Hybrid Solar Cells
Uppsala University, Disciplinary Domain of Science and Technology, Chemistry, Department of Chemistry - Ångström, Physical Chemistry.
Uppsala University, Disciplinary Domain of Science and Technology, Chemistry, Department of Chemistry - Ångström, Physical Chemistry.
Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy.
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2012 (English)In: ACS Applied Materials and Interfaces, ISSN 1944-8244, E-ISSN 1944-8252, Vol. 4, no 11, 5997-6004 p.Article in journal (Refereed) Published
Abstract [en]

Flat titanium dioxide films, to be used as the acceptor layer in bilayer hybrid solar cell devices, were prepared by spray-pyrolysis and by spin-casting. Both preparation methods resulted in anatase titania films with similar optical and electronic properties but considerably different film morphologies. Spray pyrolysis resulted in dense TiO2 films grown onto and affected by the surface roughness of the underlying conducting glass substrates. The spin-casting preparation procedure resulted in nanoporous titania films. Hybrid solar cell devices with varying layer thickness of the small-molecule semiconducting dye TDCV-TPA were investigated. Devices built with spray-pyrolyzed titania substrates yielded conversion efficiencies up to 0.47%. Spin-cast titania substrates exhibited short circuits for thin dye layer thickness. For thicker dye layers the performance of these devices was up to 0.6% due to the higher interfacial area for charge separation of these nanoporous TiO2 substrates.

Place, publisher, year, edition, pages
2012. Vol. 4, no 11, 5997-6004 p.
Keyword [en]
hybrid solar cells, titanium dioxide, spray-pyrolysis, spin-casting, small-molecule semiconductor
National Category
Chemical Sciences Physical Sciences
Identifiers
URN: urn:nbn:se:uu:diva-190337DOI: 10.1021/am301604xISI: 000311521900038OAI: oai:DiVA.org:uu-190337DiVA: diva2:585788
Available from: 2013-01-10 Created: 2013-01-07 Last updated: 2017-12-06Bibliographically approved

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Hagfeldtt, AndersJohansson, Erik M. J.Boschloo, Gerrit

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