Effect of In Doping on the Thermoelectric Properties of p-Type BiSbTe Alloy AITranslate

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Chinese Library Classification Number:TB34[一般工业技术—材料科学与工程]

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Taking p-type Bi0.3Sb1.7Te3 alloy as the research object,the effect of In doping on its electron and phonon transport properties was investigated.The results show that with the increase of In content,Seebeck coefficient increases and the electrical conductivity decreases.When the In content is 0.025,the sample has the optimal power factor of 37.02 μW/(K^2·cm).Furthermore,the point defect concentration and lattice distortion degree of the material increase with In doping,which leads to the enhanced scattering of phonons and then the decreased thermal conductivity of the material.Consequently,the sample with In content of 0.050 has the optimal ZT of 1.11 at 401 K.This work provides an effective method to improve the thermoelectric properties of p-type Bi0.3Sb1.7Te3 alloy,and increases the applied potential of thermoelectric materials.