High-Performance Solid-State Thermal Diode Consisting of Ag2(S,Se,Te)
High-Performance Solid-State Thermal Diode Consisting of Ag2(S,Se,Te)
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DOI：
10.1007/s11664-020-07964-8
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发表时间：
2020-02-03
影响因子：
2.1
通讯作者：
Takeuchi, Tsunehiro
中科院分区：
文献类型：
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作者：
Hirata, Keisuke;Matsunaga, Takuya;Takeuchi, Tsunehiro
热敏二极管是构建热管理系统的关键技术，其热流的大小|J|随其方向变化。复合热敏二极管由导热系数与温度关系相反的两种材料组成。在本工作中使用了硫属银化物Ag-2(S，Se，Te)，因为它们的导热系数变化很大，在300K<；T<；450K的温度范围内发生相变，在相变温度下，它们的导热系数跃升了200%~500%，这很可能是由于电子导热系数的变化。制备了由Ag2S0.6Se0.4和Ag2S0.1Te0.9组成的热敏二极管，并对其性能进行了评价。当安装在T-H=413K和T-L=300K的两个热源之间时，所研制的热敏二极管的热整流比(TRR)=|J(大)|/|J(小)|=2.7+/-0.1。值得注意的是，这是迄今报道的最高的固态热敏二极管的热整流比。
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 Ag-2(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) = |J(large)|/|J(small)| = 2.7 +/- 0.1 when installed between two heat reservoirs kept at T-H = 413 K and T-L = 300 K. Notably, this TRR is the highest ever reported for a solid-state thermal diode.