High-throughput optimization and fabrication of Bi2Te2.7Se0.3-based artificially tilted multilayer thermoelectric devices
High-throughput optimization and fabrication of Bi2Te2.7Se0.3-based artificially tilted multilayer thermoelectric devices
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DOI：
10.1016/j.jeurceramsoc.2022.03.034
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发表时间：
2022-03
影响因子：
5.7
通讯作者：
Wanting Zhu;Hongyu Zhou;P. Wei;Congli Sun;Dan-qi He;Xiaolei Nie;X. Sang;Wenyu Zhao;Qingjie Zhang
中科院分区：
文献类型：
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作者：
Wanting Zhu;Hongyu Zhou;P. Wei;Congli Sun;Dan-qi He;Xiaolei Nie;X. Sang;Wenyu Zhao;Qingjie Zhang
人工倾斜多层热电器件(ATMTD)因其易于小型化和器件设计的高度灵活性而受到越来越多的关注。然而，由于缺乏有效的策略来优化其材料匹配和几何构型，这些器件大多效率低下。在这里，采用高通量优化方法从覆盖230种候选的材料基因组数据库中筛选高性能的Bi2Te2.7Se0.3 ATMTD。有14种ATMTD具有ZTzx，最大值大于0.3，倾角大于15°。由于Bi0.1Sb1.9Te3/Bi2Te2.7Se0.3ATMTD具有优良的横向优值系数、较大的倾斜角和良好的界面兼容性，被筛选出来并制成。实验结果表明，Bi0.1Sb1.9Te3/Bi2Te2.7Se0.3ATMTD材料的横向优值系数大于0.3，热敏系数大于0.11 mV·K−1，功率密度高达1.1 kW·m−2。这表明ATMTDS在温度检测和发电领域具有很大的应用潜力。
Artificially tilted multilayer thermoelectric devices (ATMTDs) have attracted growing attention due to their ease in miniaturization and high flexibility in device design. However, most of these devices are inefficient due to the lack of effective strategy to optimize their material matching and geometrical configurations. Herein, a high-throughput optimization approach is employed to screen high-performance Bi2Te2.7Se0.3-based ATMTDs from a material genome database covering 230 kinds of candidates. 14 kinds of ATMTDs are found to haveZTzx,maxvalues exceeding 0.3 and tilt angles greater than 15°. Bi0.1Sb1.9Te3/Bi2Te2.7Se0.3ATMTD is screened out and fabricated because of its excellent transverse figure of merit, large tilt angle, and good interface compatibility. Consequently, transverse figure of merit over 0.3, thermal sensitivity greater than 0.11 mV·K−1, and power density up to 1.1 kW·m−2are recorded in Bi0.1Sb1.9Te3/Bi2Te2.7Se0.3ATMTD. This indicates that ATMTDs have great potential for application in the fields of temperature detection and power generation.