Effect of annealing on structural and optical properties of sol-gel prepared Cd doped ZnO thin films

Journal Article · Wed Jun 24 00:00:00 EDT 2015 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.4917905· OSTI ID:22490384

Sahoo, Guruprasad; Jain, Mahaveer K. ^[1]; Meher, S. R. ^[2]

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1. Department of Physics, Indian Institute of Technology Madras, Chennai-600036 (India)
2. School of Advanced Sciences, VIT University, Vellore-632014 (India)

Zn{sub 1-x}Cd{sub x}O thin films have been prepared by sol-gel spin coating method. Structural analysis shows that the Cd substitution into the wutrzite ZnO lattice is achieved up to about 20 mol %. The optical band gap is found to decrease with the increase in Cd content. Increase in the annealing temperature up to a certain critical temperature leads to band gap narrowing because of the proper substitution of Zn by Cd and thereafter the band gap increases due to Cd re-evaporation from the lattice sites. This critical temperature lowers down with the increase in Cd doping concentration. The resistivity decreases with the increase in Cd content and increases with the increase in annealing temperature.

• OSTI ID: 22490384
• Journal Information: AIP Conference Proceedings, Vol. 1665, Issue 1; Conference: 59. DAE solid state physics symposium 2014, Tamilnadu (India), 16-20 Dec 2014; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); ISSN 0094-243X
• Country of Publication: United States
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ANNEALING
CADMIUM OXIDES
CONCENTRATION RATIO
CRITICAL TEMPERATURE
CUBIC LATTICES
DOPED MATERIALS
ENERGY GAP
EVAPORATION
OPTICAL PROPERTIES
SOL-GEL PROCESS
SPIN-ON COATING
TEMPERATURE DEPENDENCE
THIN FILMS
ZINC OXIDES