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High-Performance Solid-State Thermal Diode Consisting of Ag 2 (S,Se,Te)
Journal of Electronic Materials ( IF 2.2 ) Pub Date : 2020-02-03 , DOI: 10.1007/s11664-020-07964-8
Keisuke Hirata , Takuya Matsunaga , Saurabh Singh , Masaharu Matsunami , Tsunehiro Takeuchi

Abstract

Thermal diodes, in which the magnitude of the heat flow |J| changes with its direction, are a key technology for constructing heat management systems. Composite thermal diodes are composed of two materials possessing opposite temperature dependence of thermal conductivity. Silver chalcogenides Ag2(S,Se,Te) were employed in this work because of their drastic change in thermal conductivity, with a phase transition in the temperature range of 300 K < T < 450 K. A jump of 200% to 500% in their thermal conductivity is observed at the phase-transition temperature, most likely due to the change in electron thermal conductivity. A thermal diode consisting of Ag2S0.6Se0.4 and Ag2S0.1Te0.9, both of which were selected by considering the measured thermal conductivity, has been prepared, and its performance evaluated. The developed thermal diode was confirmed to possess a thermal rectification ratio (TRR) = |Jlarge|/|Jsmall| = 2.7 ± 0.1 when installed between two heat reservoirs kept at TH = 413 K and TL = 300 K. Notably, this TRR is the highest ever reported for a solid-state thermal diode.



中文翻译:

Ag 2(S,Se,Te)组成的高性能固态热敏二极管

摘要

热二极管,其中热流的大小| J | 改变其方向,是构建热量管理系统的关键技术。复合热敏二极管由两种材料组成,它们具有与导热率相反的温度依赖性。银硫属元素化物Ag 2(S,Se,Te)因其热导率急剧变化而在300 K < T  <450 K的温度范围内发生相变,因此被采用 。跃迁200%至500%在相变温度下观察到它们的热导率最可能是由于电子热导率的变化。由Ag 2 S 0.6 Se 0.4和Ag组成的热敏二极管已经准备了两种S 2 Te 0.1 Te 0.9,这两种材料都是通过考虑测得的热导率选择的,并对其性能进行了评估。确认已开发的热敏二极管具有热整流比(TRR)= | J| / | J | 当安装在两个保持在T H  = 413 K和T L  = 300 K的储热器之间时,它的导通电阻为2.7±0.1 。值得注意的是,该TRR是固态热敏二极管有史以来的最高记录。

更新日期:2020-02-10
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