Annealing effects on the structural and optical behavior of Cu2Se0.8Te0.2 thin film
Source abstract
Abstract
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 Cu2Se 0.8Te0.2 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 Cu2Se 0.8Te0.2 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, Cu2Se 0.8Te0.2 compound can be adopted as a thin film to further improve the solar cell's photoelectric performance.
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Research context
OpenAlex topics: Chalcogenide Semiconductor Thin Films · Advanced Thermoelectric Materials and Devices · Quantum Dots Synthesis And Properties
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References (24)
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