TY  - EJOU
AU  - Hadi, S. M. 
AU  - Khudayer, I. H. 

TI  - Annealing effects on the structural and optical behavior of Cu<sub>2</sub>Se<sub>0.8</sub>Te<sub>0.2</sub> thin film
T2  - Chalcogenide Letters

PY  - 2024
VL  - 21
IS  - 11
SN  - 1584-8663

AB  - Chalcogenide have attracted great interest over the last years due to their thermal, electrical 
and optical properties. Understanding the crystal structures of chalcogenide is crucial in the 
hunt for novel materials. In this study, we prepared Cu<sub>2</sub>Se<sub>0.8</sub>Te<sub>0.2</sub> thin film on a glass 
substrate using thermal evaporation method and then annealed at different temperatures 
(403, 453 &503) K to study the effect of annealing on the structure and optical properties of 
the film, we find that Cu<sub>2</sub>Se<sub>0.8</sub>Te<sub>0.2</sub> the composition is cubic structural and this is shown by 
X-ray analyses. And the optical properties improve with different annealing degrees, that is 
annealing reduces absorption while increasing transmittance, and so we find the optical 
energy gap increasing by increasing annealing where it is (1.1) eV at room temperature and 
it becomes (1.7) eV counting the temperature of 503 K. Thus, Cu<sub>2</sub>Se<sub>0.8</sub>Te<sub>0.2</sub> compound can 
be adopted as a thin film to further improve the solar cell's photoelectric performance.
KW  - Thin films
KW  -  X-ray diffraction
KW  -  Cu<sub>2</sub>SeTe
KW  -  Optical parameters
KW  -  Crystals structure

DO  - 10.15251/CL.2024.2111.885