自然科学进展﹒国际材料（英文）, 2017, 27(2): 203-207.

基金项目: This work was supported partly by the Science and Technology Development Program of Henan Province of China(Grant 142102210043) 2014 Annual Postdoctoral Scientific Research Fund of Henan Province(Grant 2014008) National Natural Science Foundation of China(Grant 11502071)

Thermoelectric properties of I-doped n-type Bi2Te3-based material prepared by hydrothermal and subsequent hot pressing

Keywords： n-type Bi2Te3

I-doped Bi2Te3_xIx (x=0,0.05,0.1,0.2) flower-like nanoparticles were synthesized by a hydrothermal method through a careful adjustment of the amount of ethylenediamine tetraacetic acid surfactant.The nanopowders of flower-like nanoparticles were hot-pressed into bulk pellets and the thermoelectric properties of the pellets were investigated.The results showed that I-doping decreased the electrical resistivity effectively,and the thermal conductivitives of the Bi2Te3-xIx bulk samples was lower because of the closer atomic mass of I compared to Te.As a result,a ZT value of 1.1 was attained at 448 K for the Bi2Te2.9I0.1 sample.

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Thermoelectric properties of I-doped n-type Bi2Te3-based material prepared by hydrothermal and subsequent hot pressing

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