室温 格子 GeSn合金的热导率
Omar Concepción1, Jhonny Tiscareño-Ramírez1, Ada Angela Chimienti2
1Peter Gruenberg Institute 9 (PGI-9) and JARA-Fundamentals of Future Information Technologies, Forschungszentrum Juelich, Juelich 52428, Germany.
ACS applied energy materials
|May 31, 2024
概括
-锡 (GeSn) 合金的导热率显著降低,使绿色计算和物联网设备能够高效地收集热电能. 这些CMOS兼容材料为集成电源解决方案提供了潜力.
科学领域:
- 材料科学 材料科学 材料科学
- 固态物理 固态物理
- 半导体技术 半导体技术
背景情况:
- 高效的能源采集对于可持续的绿色计算和超低功耗物联网 (IoT) 应用至关重要.
- 热电能收获器需要在芯片和体温下运行的CMOS兼容材料.
- 像-锡 (GeSn) 合金这样的IV组半导体是这些应用的有希望的候选者.
研究的目的:
- 研究热电应用的GeSn合金的晶格导热率 (κ).
- 评估n型和p型GeSn表轴层的热电功率 (ZT) 值.
- 评估GeSn合金在CMOS平台上的单体集成的潜力.
主要方法:
- 在Si晶片上使用化学蒸汽沉积,高达14%的Sn含量的GeSn层的长轴生长.
- 通过差分3ω方法对网格导热率 (κ) 的电测量.
- 对电荷传输特性进行数值估计,以确定热电功率 (ZT) 的数字.
主要成果:
- 测量了格子导热率 (κ) 的急剧下降,从Ge的55W/m·K降至Ge合金的4W/m·K. 测量了0.88Sn0.12合金.
- 发现热导电性对于应力松合金的层厚度是独立的.
- 证明了GeSn合金在20°C-100°C范围内的高潜力,以实现与SiGe合金相比的能量收获.
结论:
- 单晶GeSn合金表现出优良的热电特性,适合用于能源采集.
- 基于Si的半导体在温度范围有限的热电应用中,GeSn合金提供了一个CMOS兼容的解决方案.
- 这项研究为CMOS平台上的单立体集成热电学开辟了可能性.
更多相关视频
04:09Demonstrating the Simplicity and In Situ Temperature Monitoring of the Mechanochemical Synthesis of Metal Chalcogenides Suitable for Thermoelectrics
Published on: August 30, 2024
334
11:21Atmospheric Pressure Fabrication of Large-Sized Single-Layer Rectangular SnSe Flakes
Published on: March 21, 2018
8.1K
相关概念视频
02:54Trends in Lattice Energy: Ion Size and Charge
23.8K
An ionic compound is stable because of the electrostatic attraction between its positive and negative ions. The lattice energy of a compound is a measure of the strength of this attraction. The lattice energy (ΔHlattice) of an ionic compound is defined as the energy required to separate one mole of the solid into its component gaseous ions. For the ionic solid sodium chloride, the lattice energy is the enthalpy change of the process:
23.8K
01:27Thermal expansion and Thermal stress: Problem Solving
1.2K
San Francisco's Golden Gate Bridge is exposed to temperatures ranging from -15 °C to 40 °C. At its coldest, the main span of the bridge is 1275 m long. Assuming that the bridge is made entirely of steel, what is the change in its length between these temperatures?
To solve the problem, first, identify the known and unknown quantities. The initial length (L) of the bridge is 1275 m, the coefficient of linear expansion (α) for steel is 12 x 10-6/°C, and the change in...
To solve the problem, first, identify the known and unknown quantities. The initial length (L) of the bridge is 1275 m, the coefficient of linear expansion (α) for steel is 12 x 10-6/°C, and the change in...
1.2K
01:25Resistance and Conductance
75
A conductor's DC resistance at a given temperature is influenced by its resistivity, length, and cross-sectional area. Resistivity is an inherent property of the conductor material, with annealed copper serving as the international standard for measurement. For instance, the resistivity of hard-drawn aluminum at 20 degrees Celsius is 61% of the standard conductivity of annealed copper.
Various factors impact the resistance of a conductor. Spiraling in stranded conductors increases their...
Various factors impact the resistance of a conductor. Spiraling in stranded conductors increases their...
75
01:22Semiconductors
684
There is variation in the electrical conductivity of materials - metals, semiconductors, and insulators that are showcased with the help of the energy band diagrams.
Metals such as copper (Cu), zinc (Zn), or lead (Pb) have low resistivity and feature conduction bands that are either not fully occupied or overlap with the valence band, making a bandgap non-existent. This allows electrons in the highest energy levels of the valence band to easily transition to the conduction band upon gaining...
Metals such as copper (Cu), zinc (Zn), or lead (Pb) have low resistivity and feature conduction bands that are either not fully occupied or overlap with the valence band, making a bandgap non-existent. This allows electrons in the highest energy levels of the valence band to easily transition to the conduction band upon gaining...
684