锭
碲化铋
区域熔化
热电效应
材料科学
兴奋剂
热电材料
碲化物
铋
碲化铅
热导率
塞贝克系数
冶金
矿物学
分析化学(期刊)
化学
复合材料
光电子学
热力学
物理
合金
色谱法
作者
Shuai Zhuang,Guoqiang Liu,Jianfeng Cai,Manhong Zhang,Haoyang Hu,Jiu Hui Wu,Peng Sun,Xiaojian Tan,Jun Jiang
标识
DOI:10.1002/ente.202300371
摘要
Bismuth telluride is the only commercially applied thermoelectric material. The n‐type material is usually prepared by the method of zone melting; however, the utilization ratio of the ingot is relatively low, owing to the bad thermoelectric performance of the two ends. Herein, the waste of n‐type bismuth telluride is recovered by the second zone melting and PbBr 2 doping. It is shown that the second zone melting can improve the grain alignment, leading to the increase of carrier mobility. When PbBr 2 doping is introduced, lattice thermal conductivity is largely reduced by the high dense dislocations. As a result, the peak power factor and maximum ZT reach 53 μW cm −1 K −2 and 1.15, respectively, which are even higher than the values of the original commercial material. This work provides an economic and applicable strategy to recover the waste of bismuth telluride thermoelectric materials.
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