The characterisation of aerosol assisted CVD conducting, photocatalytic indium doped zinc oxide films
- Citation:
- Nolan, M.G.a, Hamilton Obrien Bruno Pereira Fortunato Martins Povey Pemble J. A. a S. "The characterisation of aerosol assisted CVD conducting, photocatalytic indium doped zinc oxide films." Journal of Photochemistry and Photobiology A: Chemistry. 219 (2011): 10-15.
Abstract:
Indium doped, and undoped, zinc oxide films were deposited using aerosol assisted chemical vapour deposition (AACVD) at atmospheric pressure on glass substrates. Electrical measurements (I-V) showed a reduction in resistivity following the addition of indium, and XRD analysis revealed an associated switch to c-axis preferred crystal orientation. The ability of the films to oxidise organic material on their surface was analysed using stearic acid as the model contaminant under ultra-violet (UV, 365 nm) irradiation. The In-doped films displayed a greater rate of organic decomposition, which we attribute to the formation of a platelet surface structure having a larger surface area than the undoped films, on which the UV generated electrons and holes may react to form active photocatalytic species. In addition we suggest that the switch to c-axis crystal orientation may reduce the electron-hole pair recombination rate at the grain boundaries, due to an improvement in crystallinity and related reduction in carrier scattering losses, leading to an increase in photocatalytic organic decomposition rate. © 2011 Elsevier B.V. All rights reserved.
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