热电效应
载流子
热电材料
纳米结构
材料科学
声子
开尔文探针力显微镜
光电子学
电子迁移率
碲化铅
工程物理
能量转换效率
热电发电机
纳米技术
凝聚态物理
兴奋剂
热力学
物理
原子力显微镜
作者
Baohai Jia,Di Wu,Lin Xie,Wei Wu,Yu Tian,Shangyang Li,Yan Wang,Yonggang Xu,Binbin Jiang,Zhiquan Chen,Yuxiang Weng,Jiaqing He
出处
期刊:Science
[American Association for the Advancement of Science (AAAS)]
日期:2024-04-05
卷期号:384 (6691): 81-86
标识
DOI:10.1126/science.adj8175
摘要
Thermoelectric materials can realize direct and mutual conversion between electricity and heat. However, developing a strategy to improve high thermoelectric performance is challenging because of strongly entangled electrical and thermal transport properties. We demonstrate a case in which both pseudo-nanostructures of vacancy clusters and dynamic charge-carrier regulation of trapped-hole release have been achieved in p-type lead telluride–based materials, enabling the simultaneous regulations of phonon and charge carrier transports. We realized a peak zT value up to 2.8 at 850 kelvin and an average zT value of 1.65 at 300 to 850 kelvin. We also achieved an energy conversion efficiency of ~15.5% at a temperature difference of 554 kelvin in a segmented module. Our demonstration shows promise for mid-temperature thermoelectrics across a range of different applications.
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