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Title: Structural and optical modification of Ga-doped zinc oxide thin films induced by thermal annealing
Authors: Negi, Sandhya
Rana, Mahender Partap Singh
Gautam, Subodh K
Singh, R G
Singh, Fouran
Ramola, R C
Keywords: Gallium doped Zinc oxide;Zinc oxide thin film;Sol-gel spin coating;Thermal annealing Stress;Band Gap;Grain growth
Issue Date: Apr-2016
Publisher: NISCAIR-CSIR, India
Abstract: Ga doped ZnO (ZnO:Ga) thin films were prepared by the sol-gel spin coating technique. The films are annealed at different temperature varying from 500°C to 900°C in controlled oxygen environment. The effects of annealing temperature on structural, morphological and optical properties of films are investigated. The XRD results show that all deposited films are textured along the (101) direction and exhibits wurtzite phase of ZnO. The AFM images show that the grain size of ZnO films increased with increasing annealing temperature. Red shifting (band gap decreases) of the optical band gap is also observed on increasing the temperature. The observations are explained on the basis of stress and grain growth induced by thermal annealing.
Page(s): 236-240
ISSN: 0975-1041 (Online); 0019-5596 (Print)
Appears in Collections:IJPAP Vol.54(04) [April 2016]

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