title: Spectroscopic study and optical and electrical properties of Ti-doped ZnO thin films by spray pyrolysis.
abstract: Zinc oxide films were doped with different concentrations of Ti on glass substrates at 400°C by spray pyrolysis technique. The films exhibited single phase ZnO for low concentrations of Ti. Wurtzite ZnO peaks were observed at higher doping concentration with decreased crystallinity. Crystallite size, strain and dislocation density were evaluated from the X-ray diffraction data. Surface morphology of the films indicated that a remarkable decrease in grain size with increasing of Ti concentration. The band gap of the films was found to be increased from 3.20 eV to 3.32 eV as the concentration of Ti doping increases. The resistivity of the films decreased from 9×10(5) Ω cm to 9×10(4) Ω cm with the increase of Ti doping concentration. Both Raman spectroscopy and room temperature photoluminescence exhibited characteristic peaks that confirmed the formation of ZnO phase.
authors.affiliation: Department of Physics, Annamalai University, Annamalai Nagar 608 002, India.
authors.forename: R
authors.initials: R
authors.lastname: Sridhar
authors.affiliation: Department of Physics, Annamalai University, Annamalai Nagar 608 002, India. Electronic address: cmanoharan1@rediffmail.com.
authors.forename: C
authors.initials: C
authors.lastname: Manoharan
authors.affiliation: Department of Physics, A.V.C. College, Mayiladuthurai, Tamilnadu, India.
authors.forename: S
authors.initials: S
authors.lastname: Ramalingam
authors.affiliation: Department of Physics, Annamalai University, Annamalai Nagar 608 002, India.
authors.forename: S
authors.initials: S
authors.lastname: Dhanapandian
authors.affiliation: Nanotechnology Centre, University of Bahrain, PO Box 32038, Bahrain; Department of Physics, College of Science, University of Bahrain, PO Box 32038, Bahrain.
authors.forename: M
authors.initials: M
authors.lastname: Bououdina
mesh_terms: D003460:Crystallization; D049449:Luminescence; D013059:Spectrum Analysis, Raman; D014025:Titanium / Q000032:analysis*; D014961:X-Ray Diffraction; D015034:Zinc Oxide / Q000737:chemistry*
chemical_list: D014025:Titanium; D015034:Zinc Oxide
keywords: Photoluminescence; Raman; Resistivity; Ti doping; ZnO thin films