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ARTICLE

Effect of annealing temperature on the structural and optical properties of vacuum evaporated Cu₁₃Se₅₂Bi₃₅ thin films

A. B. Alwany^a,*, A. Alnakhlani^a,b, B. Hassan^a,b, M. A. Algradee^a, R. A. Fouad^b, A. A. Alfaqeer^c

a Physics Department, Faculty of Science, Ibb University, Ibb 70270, Yemen
b Department of Physics, College of Science and Arts, Qassim University, Alasyah, Saudi Arabia
c Physics Department, Faculty of Science and Education, Sheba Region University, Marib, Yemen

* Corresponding Author:

Chalcogenide Letters 2024, 21(1), 99-112. https://doi.org/10.15251/CL.2024.211.99

Received 26 October 2023; Accepted 17 January 2024;

Abstract

Thermal evaporation technique was used to prepare Cu₁₃Se₅₂Bi₃₅ thin films. The asdeposited and annealed samples were investigated by using the X-ray diffraction (XRD), scanning electron microscopy (SEM) and optical transmission and reflection. The XRD showed that the as-deposited film is crystalline in nature, and the crystalline size of samples increased with increasing the annealing temperature. SEM images showed that the morphology of the sample changes with the annealing temperature. The direct transition of the optical band gap (E_g) of Cu₁₃Se₅₂Bi₃₅ films was observed and the values of E_g decreased with increasing the annealing temperature. Other optical parameters were also investigated.

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Keywords

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