Strong and efficient bismuth telluride-based thermoelectrics for Peltier microcoolers  

作　　者：Hua-Lu Zhuang Bowen Cai Yu Pan Bin Su Yilin Jiang Jun Pei Fengming Liu Haihua Hu Jincheng Yu Jing-Wei Li Zhengqin Wang Zhanran Han Hezhang Li Chao Wang Jing-Feng Li 

机构地区：[1]State Key Laboratory of New Ceramics and Fine Processing,School of Materials Science and Engineering,Tsinghua University,Beijing 100084,China [2]Guangxi Pilot Free Trade Zone Jianju Technology Co.,LTD.,Qinzhou 535000,China [3]Max Planck Institute for Chemical Physics of Solids,Dresden 01187,Germany [4]Department of Precision Instrument,Tsinghua University,Beijing 100084,China

出　　处：《National Science Review》2024年第10期325-334,共10页国家科学评论（英文版）

基　　金：supported by the Basic Science Center Project of National Natural Science Foundation of China(52388201);the National Key R&D Program of China(2023YFB3809400);the China Postdoctoral Science Foundation(2023M731870);H.L.Z.,J.Y.and H.L.acknowledge financial support from the Shuimu Tsinghua Scholar Program(2022SM045).

摘　　要：Thermoelectric Peltier coolers(PCs)are being increasingly used as temperature stabilizers for optoelectronic devices.Increasing integration drives PC miniaturization,requiring thermoelectric materials with good strength.We demonstrate a simultaneous gain of thermoelectric and mechanical performance in(Bi,Sb)_(2)Te_(3),and successfully fabricate micro PCs(2×2 mm^(2)cross-section)that show excellent maximum cooling temperature difference of 89.3 K with a hot-side temperature of 348 K.A multi-step process involving annealing,hot-forging and composition design,is developed to modify the atomic defects and nano-and microstructures.The peak ZT is improved to∼1.50 at 348 K,and the flexural and compressive strengths are significantly enhanced to∼140 MPa and∼224 MPa,respectively.These achievements hold great potential for advancing solid-state refrigeration technology in small spaces.

关 键 词：bismuth telluride THERMOELECTRIC powder metallurgy precision processing Peltier cooler MICRODEVICE 

分 类 号：TB34[一般工业技术—材料科学与工程]