研究目的
Investigating the synthesis and thermoelectric performance of CuInTe2?In2Te3 and Cu0.85Ag0.15InTe2?In2Te3 solid solutions to enhance thermoelectric properties through defect engineering.
研究成果
The study demonstrates that cation vacancies and substitutional defects can significantly reduce lattice thermal conductivity and enhance thermoelectric performance in CuInTe2 based compounds. A high figure of merit of 1.1 is achieved, indicating the potential of defect engineering in improving thermoelectric materials.
研究不足
The study focuses on specific solid solutions and may not be directly applicable to other materials. The enhancement of thermoelectric performance is limited by the intrinsic properties of the materials used.
1：Experimental Design and Method Selection:
The study involves the synthesis of solid solutions and analysis of their thermoelectric properties. Theoretical models are used to understand the effects of defects on thermal conductivity.
2：Sample Selection and Data Sources:
High purity elements are used to synthesize the samples. Thermoelectric properties are measured using commercial systems.
3：List of Experimental Equipment and Materials:
Includes high purity Cu, In, Ag, and Te, quartz tubes for sealing, spark plasma sintering (SPS-625), and measurement systems like LSR-3 for electrical properties and Netzsch LFA457 for thermal diffusivity.
4：Experimental Procedures and Operational Workflow:
Elements are mixed, sealed in quartz tubes, heated, annealed, ground into powders, and sintered. Thermoelectric properties are then measured.
5：Data Analysis Methods:
The Debye?Callaway?Klemens model is used to analyze thermal conductivity data.
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