Photoconductivity on nanocrystalline ZnO-TiO2 thin films obtained by sol-gel

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Título :	Photoconductivity on nanocrystalline ZnO-TiO2 thin films obtained by sol-gel
Palabras clave :	Zinc oxide Titania
Fecha de publicación :	16-ene-2013
Editorial :	SPIE Proceedings
Descripción :	In this paper we report results on the synthesis, characterization and photoconductivity behaviour of amorphous and nanocrystalline ZnO/TiO2 thin films. They were produced by the sol–gel process at room temperature by using the spin-coating method and deposited on glass substrates. The ZnO/TiO2 films were synthesized by using tetrabutyl orthotitanate and zinc nitrate hexahydrate as the inorganic precursors. The samples were sintered at 520°C for 1 hour. The obtained films were characterized by X-ray diffraction (XRD), optical absorption (OA), infrared spectroscopy (IR) and scanning electronic microscopy (SEM) studies. Photoconductivity studies were performed on amorphous and nanocrystalline (anatase phase) films to determine the charge transport parameters. The experimental data were fitted with straight lines at darkness and under illumination at 310 nm, 439 nm and 633 nm. This indicates an ohmic behavior. The φμτ and φl0 parameters were fitted by least-squares with straight lines (nanocrystalline films) and polynomial fits (amorphous films).
URI :	http://www.repositoriodigital.ipn.mx/handle/123456789/10674
Otros identificadores :	0277-786X http://hdl.handle.net/123456789/156
Aparece en las colecciones:	Doctorado

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7041 Photoconductivity ZnO_TiO2 2008.pdf		735.59 kB	Adobe PDF	Visualizar/Abrir

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