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在溶液加工的多晶SnSe中,CdSe量子点可以实现高热电性能.

Wei Dou1, Yaru Gong1, Xinqi Huang1

  • 1National Key Laboratory of Advanced Casting Technologies, MIIT Key Laboratory of Advanced Metallic and Intermetallic Materials Technology, Engineering Research Center of Materials Behavior and Design, Ministry of Education, Nanjing University of Science and Technology, Nanjing, 210094, China.

Small (Weinheim an der Bergstrasse, Germany)
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概括

使用溶液工艺,用 (Ge) 和 (Cd) 合的锡化 (SnSe) 实现了高热电性能. 引入CdSe量子点和格子应变显著降低了导热率和增强了功率因子.

关键词:
在SnSeSe中.峰值 ZTT 的时间.量子点是一个量子点.解决方案-加工处理的热电热电的电力.

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科学领域:

  • 材料科学 材料科学 材料科学
  • 固态物理 固态物理
  • 纳米技术 纳米技术

背景情况:

  • 锡化 (SnSe) 是一个有前途的热电材料.
  • 提高SnSe的热电性能对于能源采集应用至关重要.

研究的目的:

  • 为了提高溶液处理多晶SnSe的热电性能.
  • 为了研究Ge和Cd共和CdSe量子点对SnSe属性的影响.

主要方法:

  • 解决方案处理将CdSe量子点引入Ge和Cd共的SnSe.
  • 微结构性表征以确认CdSe量子点的存在.
  • 紫外光电光谱学用于分析电子结构的变化.
  • 测量热电性质 (西贝克系数,电导率,热导率).

主要成果:

  • 在Ge和Cd配套的SnSe.中,获得了≈2.0的高功率 (ZT) 值.
  • CdSe量子点增强了状态的密度,导致了更大的Seebeck系数.
  • Ge和Cd配合优化了载体度和提高了电导率.
  • CdSe量子点和格子应变诱导了强烈的声子散射,导致了超低的格子导热率.

结论:

  • 溶液处理的多晶SnSe与Ge和Cd配合以及CdSe量子点具有出色的热电性能.
  • 微结构操纵,包括量子点集成和格子应变,是设计先进热电材料的有效策略.