利用载体的移动性使得高性能的Mg,Sb,Bi) 热电器成为可能
Longquan Wang1, Airan Li1, Xinzhi Wu1
1Research Center for Materials Nanoarchitectonics (MANA), National Institute for Materials Science (NIMS), Tsukuba 305-0044, Japan.
National science review
|January 15, 2026
概括
在Mg3(Sb,Bi) 2半导体中优化载体传输导致了高流动性和2.0的峰值值值 (zT). 这提高了热电设备用于发电的效率.
科学领域:
- 材料科学 材料科学 材料科学
- 固态物理 固态物理
- 能源转换 能源转换
背景情况:
- 载体运输对于半导体的热电性能至关重要.
- 由于多个散射机制,优化运输是很困难的.
研究的目的:
- 构建 Mg3 ((Sb,Bi) 2 的移动性图,以指导载体运输的优化.
- 通过了解散射效应来提高热电性能.
主要方法:
- 开发了一个移动图,考虑了声波-声波,粒度边界和极光波-声波散射.
- 制造和表征的Mg3 ((Sb,Bi) 2材料.
主要成果:
- 实现了179cm2V-1s-1的载体移动性的记录.
- 在723K获得了2.0~的峰值值 (zT) 值.
- 在单脚模块中证明了~13%的转换效率,在双对模块中证明了~8%的转换效率.
结论:
- 3 ((Sb,Bi) 2) 显示了高效的热电发电的巨大潜力.
- 载体运输是优化热电材料的关键设计指标.
更多相关视频
09:09Asymmetric Thermoelectrochemical Cell for Harvesting Low-grade Heat under Isothermal Operation
Published on: February 5, 2020
7.6K
04:09Demonstrating the Simplicity and In Situ Temperature Monitoring of the Mechanochemical Synthesis of Metal Chalcogenides Suitable for Thermoelectrics
Published on: August 30, 2024
751
相关概念视频
01:22Carrier Generation and Recombination
1.2K
Carrier generation is the process by which electron-hole pairs (EHPs) are created within the semiconductor. In direct-bandgap semiconductors, such as gallium arsenide (GaAs), this occurs efficiently when energy absorption prompts valence electrons to leap into the conduction band, leaving behind holes.
This process is given by the generation rate G and is efficient due to the conservation of momentum between the valence band maximum and conduction band minimum.
Indirect generation involves an...
This process is given by the generation rate G and is efficient due to the conservation of momentum between the valence band maximum and conduction band minimum.
Indirect generation involves an...
1.2K
01:21Carrier Transport
909
The generation of electrical current in semiconductors is fundamentally driven by two mechanisms: drift and diffusion. These processes are essential for the functionality and performance of semiconductor-based devices.
Drift Current:
The drift of charge carriers is started by an external electric field (E). Charged particles, such as electrons and holes, experience an acceleration between collisions with lattice atoms. For electrons, this results in a drift velocity (vd) given by:
Drift Current:
The drift of charge carriers is started by an external electric field (E). Charged particles, such as electrons and holes, experience an acceleration between collisions with lattice atoms. For electrons, this results in a drift velocity (vd) given by:
909