Comparison of Optical Parameters of Transparent Metal Oxide CdO and CdAlO Thin Films Produced by Electrochemical Deposition

Authors : Fatih Ünal

Pages : 2302-2310

Doi:10.31466/kfbd.1559447

View : 27 | Download : 32

Publication Date : 2024-12-15

Article Type : Research Paper

Abstract :In this study, CdO and CdAlO thin films were produced using a single-step electrochemical deposition method, and their basic optical parameters were compared. Optical analysis was performed in the wavelength range of 300-700 nm. As a result of the optical analysis, it was observed that the CdAlO thin film was more transparent at higher wavelengths and had a higher absorption capacity at lower wavelengths compared to the CdO thin film. The maximum transmittance (T%) was 43% for the CdO thin film and 55% for the CdAlO thin film. At 300 nm, the reflection (R%) value of the CdO thin film was 6.5%, while the R% value of the CdAlO thin film was 7.5%. The maximum absorption coefficient (α) value of the CdO thin film was 1.9x10⁶ m⁻¹, while the maximum α of the CdAlO thin film was 2.9x10⁶ m⁻¹. At 300 nm, the extinction coefficient (k), refractive index (n), energy band gap (Eg), and optical conductivity (σ) values of the CdO thin film were 0.04, 1.26, 2.82 eV, and 5.9x10¹⁴, respectively, while for the CdAlO thin film, these values were 0.07, 1.31, 3.11 eV, and 9.2x10¹⁴, respectively. Based on these results, it was concluded that the CdAlO thin film exhibited higher values compared to the CdO thin film.
Keywords : Metal oksit, CdO, CdAlO, Optiksel parametre