用于CMOS兼容热电设备的Epitaxial SiGeSn合金
Patrizio Graziosi1, Damiano Marian2, Andrea Tomadin2
1CNR - ISMN, Via P. Gobetti 101, Bologna 40129, Italy.
概括
使用--锡 (SiGeSn) 合金的热电器件对绿色IT非常有希望. 这些材料在典型的芯片温度下达到1以上的功率 (ZT),从而实现高效的能量转换.
科学领域:
- 材料科学 材料科学 材料科学
- 固态物理 固态物理
- 绿色信息技术 (绿色IT) 是一种绿色信息技术.
背景情况:
- 热电设备为废热回收和固态冷却提供了潜力.
- 将热电材料集成到微电子平台中对于先进的绿色IT应用至关重要.
- --锡 (SiGeSn) 合金正在成为一种CMOS兼容的材料系统,具有可调节的热电特性.
研究的目的:
- 为了评估异质平面SiGeSn合金的热电性质.
- 评估SiGeSn在绿色IT领域的热电器件应用中的潜力.
- 为了研究SiGeSn/Ge/Si层的优点 (ZT) 和功率因子.
主要方法:
- 使用3-ω方法测量格子导热的实验测量.
- 使用博尔兹曼传输方程计算热电功率 (ZT) 的计算.
- 在多谷SiGeSn材料系统中考虑间隔散射过程.
主要成果:
- 通过实验确定SiGeSn/Ge/Si层的低晶格导热率 (∼1-2 W/m·K).
- 在300-400K时,对于p型和n型SiGeSn实现了超过1的优点 (ZT) 值.
- 在工作温度范围内,预测的竞争性功率因子值约为20μW/cm·K2.
结论:
- SiGeSn合金在绿色IT中显示出热电应用的巨大潜力.
- 研究的基于Si的材料对现实世界热电设备集成具有很好的前景.
- 这些发现鼓励对SiGeSn进行进一步的科学研究,用于能源采集和热管理.
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