热驱动的间隔增强了n型Bi2的热电ZTTe2.7Se0.3的热电

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Te-Hsien Wang, Tsung-Yu Huang¹, Cheng-Lung Chen²

¹Department of Materials Engineering and Center for Plasma and Thin Film Technologies, Ming Chi University of Technology, New Taipei City 243, Taiwan.

ACS applied materials & interfaces

|August 20, 2024

概括

与甲化化晶体之间的合增强了热电性能,通过优化电性能和增加声子散射. 这提高了热电功率 (ZT) 以提高能源效率.

科学领域:

材料科学材料科学材料科学
纳米技术纳米技术
固态物理固态物理

背景情况:

分层纳米材料在科学领域表现出了显著的多功能性.
热电材料对于能源采集和冷却应用至关重要.
比斯木 telluride selenide (Bi2Te2.7Se0.3) 是一个有前途的n型热电材料.

研究的目的:

为了研究 (Co) 进入Bi2Te2.7Se0.3晶体的间隙.
阐明间歇性Co增强热电性能的机制.
在n型Bi2Te2.7Se0.3.3中优化热电能效.

主要方法:

通过热驱动的的化成 (CuI) 0.002Bi2Te2.7Se0.3晶体.
测量热电特性,包括Seebeck系数,电导率和热导率.
理论电子结构计算,以了解的作用.

主要成果:

间隔降低了载体度,改善了Seebeck系数,同时降低了移动性和电导率.
在400K以上观察到增强的功率因子.
由于间歇性的显著声子散射,使热电功率 (ZT) 在350K时提高到1.33,为0.17%的Co.
理论计算提供了关于的电子效应的见解.

结论:

的加入有效地提高了n型Bi2Te2.7Se0.3.3的热电性能.
该研究表明了改善热电能效率的可行策略.
进一步优化含量和间隔方法可以导致先进的热电器件.

关键词:

毕斯穆特化物化物.能源效率是指能效的能源效率.它们是间歇性干扰.可持续的制造可持续的制造热驱动的热驱动器热电热电的电力.

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