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International Journal of Nanomaterials and Chemistry
An International Journal


Volumes > Volume 2 > No. 1


Synthesis and Study the Structure and Optical Properties of CdO Polycrystalline Thin Film Using Electrochemical Depositing Method

PP: 21-25
Wasnaa M. Abdulridha,
CdO thin film synthesis by electrochemical deposition method at 15 min deposition time was investigated in this paper. The result of the optical transmittance of CdO thin film which formed at room temperature was 20% at wavelength ≈ 350 nm then increases to 60% at wavelength ≈1100 nm for thin film of CdO. The band-gap was also calculated from the equation relating absorption coefficient with the wavelength. The energy band gap changes from 2.3eV (Bulk CdO) to 2.45eV (CdO thin film). The plotted graphs show the optical characteristics of the film which varied with the wavelength and the photon energy. The optical conductance and band-gap indicated that the film is transmitting within the visible range. The dielectric constant and optical conductance of the film initially decreases slowly with increase in photon energy. The extinction coefficient and refractive index of the films also evaluated, which affected with the change in transmittance. The structure of synthesized CdO thin film was analyzed by X-ray diffraction XRD which revealed that the CdO thin film are polycrystalline and have several peaks of cubic face structure. The crystallite size, dislocation density, microstrain and number of dislocations of the thin film were calculated and listed.

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