Open AccessEffect of annealing temperature on structure and optical properties of CdO nanocrystaline thin film prepare by chemical bath deposition method
Author(s) -
Salah Abdul-Jabbar Jassim,
Eman Mohammed Ali Nassar
Publication year - 2020
Publication title -
iop conference series. materials science and engineering
Language(s) - English
Resource type - Journals
eISSN - 1757-899X
pISSN - 1757-8981
DOI - 10.1088/1757-899x/928/7/072046
Subject(s) - annealing (glass) , materials science , thin film , crystallite , band gap , chemical bath deposition , diffraction , analytical chemistry (journal) , grain size , crystallography , optics , composite material , optoelectronics , nanotechnology , chemistry , metallurgy , physics , chromatography
CdO thin film has been deposited by chemical bath deposition method (CBD) on the glass substrate. Effect of annealing temperature( 573,623 and 673 K) on the structural and optical properties of the films has been investigated. The crystal structure investigated by X-ray diffraction method. Annealed CdO films are polycrystalline in nature with cubic structure having a preferential orientation along (1 1 1) plane. Analysis of XRD indicates that the intensities of peaks of the crystalline phase have increased with the increasing of annealing temperature. The structural parameters for the CdO thin films as the grain size, strain, dislocation density, and texture coefficient were calculated. Particle size for the preferential orientation at different annealing temperature is (16.95, 18.24 nm) for annealing temperature 623 and 673 K respectively. Optical properties study of CdO thin films using UV-vis spectrophotometer shows blue shift in the energy band gap as an indication of quantum confinement. It is observed that the band gap energy decreases with increasing of annealing temperature. The direct and indirect band gap energy values were found to be (2.95 2.87) and (1.945,1.914) eV respectively.