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V. SUPRIYA1, T. SATO2, M. SUGIYAMA2, K. T. R. K. REDDY1,*
In recent years, Zn1-xCoxO has attracted special attention due to the highest solubility of Co in ZnO matrix and is expected to behave as a dilute magnetic semiconductor, which exhibits ferromagnetic properties. Thin films of cobalt doped ZnO were deposited on glass substrates by chemical spray pyrolysis at various deposition temperatures, Ts that vary in the range, 260 - 350° C. 0.1M aqueous solutions of zinc acetate (Zn (CH3COO)2.2H2O) and cobalt acetate (Co (CH3COO)2.4H2O) were taken as precursors. The as-grown layers were characterized by different techniques to know their physical properties. The X-ray diffraction studies revealed that all the layers exhibited wurtzite structure with (002) plane as the preferred orientation. The grain size of the films was varied in the range, 20 - 40 nm. The average optical transmittance of the films was found to be > 75% in the visible region and the evaluated optical band gap of the films decreased from 3.37 eV to 3.22 eV with the increase of substrate temperature. The details of these results were reported and discussed.
ZnO, Thin films, Co doping, Spray method.
V. SUPRIYA, T. SATO, M. SUGIYAMA, K. T. R. K. REDDY, Structural and optical properties of cobalt doped sprayed ZnO films, Optoelectronics and Advanced Materials - Rapid Communications, 4, 12, December 2010, pp.2064-2067 (2010).
Submitted at: Nov. 11, 2010
Accepted at: Nov. 29, 2010
Optoelectronics and Advanced Materials - Rapid Communications
(2023): 0.5 - 2023 Journal Citation Reports (Clarivate Analytics, 2024)
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