Enhanced thermoelectric performance of n-type bismuth-telluride-based alloys via In alloying and hot deformation for mid-temperature power generation
Enhanced thermoelectric performance of n-type bismuth-telluride-based alloys via In alloying and hot deformation for mid-temperature power generation
复制标题
通过 In 合金化和热变形增强 n 型碲化铋基合金的热电性能，用于中温发电
DOI：
10.1016/j.jmat.2018.05.008
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发表时间：
2018-09-01
影响因子：
9.4
通讯作者：
Zhu, Tiejun
中科院分区：
文献类型：
--
作者：
Li, Feng;Zhai, Renshuang;Zhu, Tiejun
碲化铋基合金是用于室温制冷的最广泛的商用热电（TE）材料。在这里，我们成功地移动了n型碲化铋基TE材料的中温发电的最佳品质因数。SbI3掺杂用于调节载流子浓度，铟合金化用于增加带隙，抑制中温范围内有害的双极导电。由于热变形诱导的多尺度微结构，晶格热导率显著降低。结果表明，Bi1.85In0.15Te2Se +（0.25）wt%SbI 3合金热变形后在625 K时达到了接近1.1的zT峰值，显示出该合金在中温TE发电中的巨大应用前景。(C)2018中国陶瓷学会制作和主办：Elsevier B.V.
Bismuth telluride-based alloys are the most widely used commercial thermoelectric (TE) material for room temperature refrigeration. Here, we successfully shift up the optimum figure of merit of n-type bismuth-telluride-based TE materials for mid-temperature power generation. SbI3 doping is used to regulate the carrier concentration and Indium alloying to increase the bandgap, suppressing the detrimental bipolar conduction in the mid-temperature range. The lattice thermal conductivity is significantly reduced due to the multiscale microstructures induced via hot deformation. As a result, a peak zT of similar to 1.1 was attained at 625 K for Bi1.85In0.15Te2Se +( 0.25) wt% SbI3 alloy after hot deformation, showing a great application prospect of this alloy in mid-temperature TE power generation. (C) 2018 The Chinese Ceramic Society. Production and hosting by Elsevier B.V.