研究目的
To theoretically study the effect of Cu concentration on many physical parameters, including coordination number (CN), constraints number (CON), overall mean bond energy (<E>), and cohesive energy (CE), for Ge25Se65Sb10-xCux glasses and to evaluate the optical constants of the thin films.
研究成果
The study demonstrated that increasing Cu concentration in Ge25Se65Sb10-xCux glasses leads to an increase in CN, CON, <E>, and CE, indicating an increase in rigidity. The optical properties showed a decrement in the energy gap from 1.79 to 1.47 eV with the rise in Cu concentration from 0 to 10% at. %. The refractive index and electronic polarizability also increased with Cu concentration.
研究不足
The study is theoretical and focuses on the effect of Cu concentration on physical and optical properties. Experimental validation and application in practical devices are areas for future research.
1：Experimental Design and Method Selection:
The study involved the theoretical analysis of the effect of Cu concentration on physical parameters and optical properties of Ge25Se65Sb10-xCux glasses. The optical constants of the thin films were evaluated using the Swanepoel technique.
2：Sample Selection and Data Sources:
Bulk glasses of several compositions of Ge25Se65Sb10-xCux (where x = 0, 2.5, 5, 7.5 and 10 at. %) were synthesized using the melt quenching method.
3：5, 5, 5 and 10 at. %) were synthesized using the melt quenching method.
List of Experimental Equipment and Materials:
3. List of Experimental Equipment and Materials: High purity (5N) elements were used for synthesis. Thin films were prepared through the thermal evaporation method, using coating equipment (Denton Vacuum DV 502).
4：2).
Experimental Procedures and Operational Workflow:
4. Experimental Procedures and Operational Workflow: The elements were heated together to about 1225 K in a vacuum within a clean silica tube and remained in the environment for twenty-four hours. After quenching, the amorphous specimens were obtained.
5：Data Analysis Methods:
The refractive index of the films was fitted to the two-term Cauchy dispersion equation. The absorption coefficient was acquired using the conditions suggested by Connell and Lewis.
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