Enhanced thermoelectric performance in spark plasma textured bulk n-type BiTe2.7Se0.3 and p-type Bi0.5Sb1.5Te3
Enhanced thermoelectric performance in spark plasma textured bulk n-type BiTe2.7Se0.3 and p-type Bi0.5Sb1.5Te3
复制标题
DOI：
10.1063/1.4807771
复制
发表时间：
2013-05
影响因子：
4
通讯作者：
S. Bhame;D. Pravarthana;W. Prellier;J. Noudem
中科院分区：
文献类型：
--
作者：
S. Bhame;D. Pravarthana;W. Prellier;J. Noudem
采用放电等离子体织构化方法制备了块状p型和n型碲化铋。 X 射线衍射分析和电子背散射衍射测量证实了沿 001 方向单轴载荷的织构发展。有趣的是，这些纹理化样品的性能优于传统放电等离子烧结 (SPS) 制备的样品，导致 ab 平面的热导率降低。与 SPS 对应物相比，n 型 BiTe2.7Se0.3 和 p 型 Bi0.5Sb1.5Te3 织构样品在室温下的品质因数分别提高了 42% 和 33%，开辟了应用途径。
Bulk p and n-type bismuth tellurides were prepared using spark plasma texturization method. The texture development along the uniaxial load in the 001 direction is confirmed from both x-ray diffraction analysis and electron backscattering diffraction measurements. Interestingly, those textured samples outperform the samples prepared by conventional spark plasma sintering (SPS) leading to a reduced thermal conductivity in the ab-plane. The textured samples of n-type BiTe2.7Se0.3 and p-type Bi0.5Sb1.5Te3 showed a 42% and 33% enhancement in figure of merit at room temperature, respectively, as compared to their SPS counterparts, opening the route for applications.