Effect of rough interface on the thermoelectric figure of merit of the Bi2Te3/PbTe superlattice

被引：4

作者：

Mu Wu-Di ^{[1
]}

Cheng Hai-Feng ^{[1
]}

Chen Zhao-Hui ^{[1
]}

Tang Geng-Ping ^{[1
]}

Wu Zhi-Qiao ^{[1
]}

机构：

[1] Natl Univ Def Technol, Coll Aerosp & Mat Engn, Changsha 410073, Hunan, Peoples R China

来源：

ACTA PHYSICA SINICA | 2009年 / 58卷 / 02期

关键词：

superlattice; rough interface; figure of merit; QUANTUM-WELL STRUCTURES;

D O I：

10.7498/aps.58.1212

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Electron transport is analysed in Bi2Te3 quantum well of Bi2Te3/PbTe superlattice. The hybrid quantum-classical size effect model, considering the Boltsmann transport equation and classical size effect, is introduced to analyse the effect of rough interface on the electron transport and scattering and the thermoelectric figure of merit of Bi2Te3/PbTe superlattice. The PbTe barrier thickness is kept constant to avoid the influence of the variation in tunnel effect on attenuation of the carrier concentration in Bi2Te3 quantum well of Bi2Te3/PbTe superlattice. The result shows that roughness has strong influence on the thermoelectric figure of merit of Bi2Te3/PbTe superlattice. The Bi2Te3/PbTe thermoelectric figure of merit decreases with the decreasing of the portion (p) of mirror reflection in the hybrid effects. And when p is 0.3, the figure of merit is close to the experiment value.

引用

页码：1212 / 1218

页数：7

共 13 条

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