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Doped and un-doped vanadium dioxide thin films prepared by atmospheric pressure chemical vapour deposition from vanadyl acetylacetonate and tungsten hexachloride: the effects of thickness and crystallographic orientation on thermochromic properties

Doped and un-doped vanadium dioxide thin films prepared by atmospheric pressure chemical vapour deposition from vanadyl acetylacetonate and tungsten hexachloride: the effects of thickness and crystallographic orientation on thermochromic properties
Doped and un-doped vanadium dioxide thin films prepared by atmospheric pressure chemical vapour deposition from vanadyl acetylacetonate and tungsten hexachloride: the effects of thickness and crystallographic orientation on thermochromic properties
The atmospheric pressure chemical vapour deposition reaction of vanadyl acetylacetonate and tungsten hexachloride with oxygen led to the production of thin films of tungsten doped monoclinic vanadium dioxide on glass substrates. Scanning electron microscopy and X-ray diffraction indicated that the films had different morphologies and crystallinities depending on the deposition conditions used. Transmission and reflectance measurements showed a significant change in properties in the near infra-red either side of the metal to semiconductor transition. Variable temperature transmission studies show that the metal to semiconductor transition was lowered by tungsten doping. The effect of film thickness was studied with un-doped and doped films. It was found that film thickness limited the intensity of light passing through the film and the extent of the thermochromic transition but was found not to influence the hysteresis width or temperature of transition. Different film growth conditions led to a range of film morphologies which profoundly affected the resulting optical properties of the films. It was found that film morphology and preferred crystallographic orientation had a marked influence on the width and switching temperature of the thermochromic transition.
4652-4660
Binions, Russell
fb23aa39-388f-4883-9264-97e93d3578e2
Hyett, Geoffrey
4f292fc9-2198-4b18-99b9-3c74e7dfed8d
Piccirillo, Clara
b2d15dcd-a4c1-41df-acbc-dc22dca4d484
Parkin, Ivan Paul
6ec55587-fac8-4acd-a516-0e0c0106cfbb
Binions, Russell
fb23aa39-388f-4883-9264-97e93d3578e2
Hyett, Geoffrey
4f292fc9-2198-4b18-99b9-3c74e7dfed8d
Piccirillo, Clara
b2d15dcd-a4c1-41df-acbc-dc22dca4d484
Parkin, Ivan Paul
6ec55587-fac8-4acd-a516-0e0c0106cfbb

Binions, Russell, Hyett, Geoffrey, Piccirillo, Clara and Parkin, Ivan Paul (2007) Doped and un-doped vanadium dioxide thin films prepared by atmospheric pressure chemical vapour deposition from vanadyl acetylacetonate and tungsten hexachloride: the effects of thickness and crystallographic orientation on thermochromic properties. Journal of Materials Chemistry, 17 (44), 4652-4660. (doi:10.1039/b708856f).

Record type: Article

Abstract

The atmospheric pressure chemical vapour deposition reaction of vanadyl acetylacetonate and tungsten hexachloride with oxygen led to the production of thin films of tungsten doped monoclinic vanadium dioxide on glass substrates. Scanning electron microscopy and X-ray diffraction indicated that the films had different morphologies and crystallinities depending on the deposition conditions used. Transmission and reflectance measurements showed a significant change in properties in the near infra-red either side of the metal to semiconductor transition. Variable temperature transmission studies show that the metal to semiconductor transition was lowered by tungsten doping. The effect of film thickness was studied with un-doped and doped films. It was found that film thickness limited the intensity of light passing through the film and the extent of the thermochromic transition but was found not to influence the hysteresis width or temperature of transition. Different film growth conditions led to a range of film morphologies which profoundly affected the resulting optical properties of the films. It was found that film morphology and preferred crystallographic orientation had a marked influence on the width and switching temperature of the thermochromic transition.

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e-pub ahead of print date: 13 September 2007
Published date: 2007
Organisations: Organic Chemistry: Synthesis, Catalysis and Flow

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Local EPrints ID: 346970
URI: https://eprints.soton.ac.uk/id/eprint/346970
PURE UUID: afde91a3-1abf-4f89-8ccf-cfc4bf1865a5
ORCID for Geoffrey Hyett: ORCID iD orcid.org/0000-0001-9302-9723

Catalogue record

Date deposited: 14 Feb 2013 16:34
Last modified: 15 Aug 2019 00:35

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Contributors

Author: Russell Binions
Author: Geoffrey Hyett ORCID iD
Author: Clara Piccirillo
Author: Ivan Paul Parkin

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