Article (Scientific journals)
Preparation and characterization of ZnO-TiO(2) films obtained by sol-gel method
Ivanova, T.; Harizanova, A.; Koutzarova, T. et al.
2011In Journal of Non-Crystalline Solids, 357 (15), p. 2840-2845
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Keywords :
Metal oxides films; Sol-gel technology; X-Ray diffraction; Optical properties
Abstract :
[en] The sol-gel route has been applied to obtain ZnO-TiO(2) thin films. For comparison, pure TiO(2) and ZnO films are also prepared from the corresponding solutions. The films are deposited by a spin-coated method on silicon and glass substrates. Their structural and vibrational properties have been studied as a function of the annealing temperatures (400-750 degrees C). Pure ZnO films crystallize in a wurtzite modification at a relatively low temperature of 400 degrees C, whereas the mixed oxide films show predominantly amorphous structure at this temperature. XRD analysis shows that by increasing the annealing temperatures, the sol-gel Zn/Ti oxide films reveal a certain degree of crystallization and their structures are found to be mixtures of wurtzite ZnO, Zn(2)TiO(4), anatase TiO(2) and amorphous fraction. The XRD analysis presumes that Zn(2)TiO(4) becomes a favored phase at the highest annealing temperature of 750 degrees C. The obtained thin films are uniform with no visual defects. The optical properties of ZnO-TiO(2) films have been compared with those of single component films (ZnO and TiO(2)). The mixed oxide films present a high transparency with a slight decrease by increasing the annealing temperature. (C) 2011 Elsevier B.V. All rights reserved.
Disciplines :
Chemistry
Author, co-author :
Ivanova, T.;  Bulgarian Academy of Science - BAS > Central Laboratory of Solar Energy and New Energy Sources
Harizanova, A.;  Bulgarian Academy of Science - BAS > Central Laboratory of Solar Energy and New Energy Sources
Koutzarova, T.;  Bulgarian Academy of Science - BAS > Institute of Electronics
Vertruyen, Bénédicte  ;  Université de Liège - ULiège > Département de chimie (sciences) > Chimie inorganique structurale
Language :
English
Title :
Preparation and characterization of ZnO-TiO(2) films obtained by sol-gel method
Publication date :
2011
Journal title :
Journal of Non-Crystalline Solids
ISSN :
0022-3093
Publisher :
Elsevier Science Bv, Amsterdam, Netherlands
Volume :
357
Issue :
15
Pages :
2840-2845
Peer reviewed :
Peer Reviewed verified by ORBi
Available on ORBi :
since 30 August 2011

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