Annealing Effects on the Interband Transition and Optical Constants of Cobalt Doped Cadmium Oxide Thin Films

Habubi, Nadir F.

doi:10.18052/www.scipress.com/ILCPA.43.81

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Annealing Effects on the Interband Transition and Optical Constants of Cobalt Doped Cadmium Oxide Thin Films

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Abstract:

The CdO: Co films have been deposited on substrate temperature at 400 °C by spray pyrolysis method using cadmium chloride and cobalt chloride as a precursors for Cd and Co ions, respectively. The effect of annealing temperature on optical constants of Co: CdO thin films are investigated using UV-Visible spectrophotometer in the range of (300-900) nm at room temperature. The absorbance and optical parameters such as α, n, ε₁, ε_2,and χ are increased when the annealing temperature increases, while the energy gap decreased from 2.5 eV before annealing to 2.48 eV after 500 °C annealing temperature. Urbach energy is increased with the increasing of annealing temperature from 353 meV for sample before annealing to 715 meV for the same samples annealed at 500 °C.

Info:

Periodical:

International Letters of Chemistry, Physics and Astronomy (Volume 43)

Pages:

81-90

DOI:

https://doi.org/10.18052/www.scipress.com/ILCPA.43.81

Citation:

N. F. Habubi, "Annealing Effects on the Interband Transition and Optical Constants of Cobalt Doped Cadmium Oxide Thin Films", International Letters of Chemistry, Physics and Astronomy, Vol. 43, pp. 81-90, 2015

Online since:

January 2015

Authors:

Nadir F. Habubi

Keywords:

Annealing Temperature, Co Doped CdO, Optical Properties

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Creative Commons Attribution 4.0 International License

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[1] S. Jassim, E. Nassar, "Effect of annealing temperature on structure and optical properties of CdO nanocrystaline thin film prepare by chemical bath deposition method", IOP Conference Series: Materials Science and Engineering, Vol. 928, p. 072046, 2020

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[2] L. El-Khalawany, E. El-Menyawy, "Facile Producing Single Phase CdO Films Prepared Using Thermal Evaporation via Optimizing Annealing Temperature: Their Application in Photodiodes", ECS Journal of Solid State Science and Technology, Vol. 10, p. 055010, 2021

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