Babar, A. R. and Deshamukh, P. R. and Deokate, R. J. and Haranath, D. and Bhosale, C. H. and Rajpure, K. Y. (2008) Gallium doping in transparent conductive ZnO thin films prepared by chemical spray pyrolysis. Journal of Physics D: Applied Physics, 41 (13). 135404-1-135404-6. ISSN 0022-3727

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Zinc oxide (ZnO) and ZnO : Ga films have been deposited by the spray pyrolysis method onto preheated glass substrates using zinc acetate and gallium nitrate as precursors for Zn and Ga ions, respectively. The effect of Ga doping on the structural, morphological, optical and electrical properties of sprayed ZnO thin films were investigated using x-ray diffraction (XRD), scanning electron microscopy, optical absorption, photoluminescence (PL) and Hall effect techniques. XRD studies reveal that films are polycrystalline with hexagonal (wurtzite) crystal structure. The thin films were oriented along the (0 0 2) plane. Room temperature PL measurements indicate that the deposited films exhibit proper doping of Ga in ZnO lattice. The average transparency in the visible range was around ~85–95% for typical thin film deposited using 2 at% gallium doping. The optical band gap increased from 3.31 to 3.34 eV with Ga doping of 2 at%. The addition of gallium induces a decrease in electrical resistivity of the ZnO : Ga films up to 2 at% gallium doping. The highest figure of merit observed in this present study was 3.09 × 10−3 cm2 Ω−1.

Item Type: Article
Additional Information: Copyright for this article belongs to M/s IOP Publishing.
Subjects: Physical Chemistry/Chemical Physics
Depositing User: Ms Neetu Chandra
Date Deposited: 27 Oct 2014 08:42
Last Modified: 27 Oct 2014 11:13

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