Thermoelectric properties of hydrothermally synthesized Bi2Te3−xSex nanocrystals

A chemical route combined with a subsequent spark plasma sintering technique was successfully utilized to synthesize n-type Se-substituted ternary Bi2Te3−xSex (0⩽x⩽0.6). We investigated the effect of Se doping on the thermoelectric properties of the Bi2Te3 nanostructured bulk materials. The results...

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Published in:Scripta materialia 2012-07, Vol.67 (2), p.161-164
Main Authors: Li, D., Qin, X.Y., Dou, Y.C., Li, X.Y., Sun, R.R., Wang, Q.Q., Li, L.L., Xin, H.X., Wang, N., Wang, N.N., Song, C.J., Liu, Y.F., Zhang, J.
Format: Article
Language:English
Subjects:
Dopants
Doping
Electrical properties
Nanocrystalline materials
Nanocrystals
Nanostructure
Scattering
Spark plasma sintering
Thermal conductivity
Thermoelectricity
X-ray diffraction
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container_end_page 164
container_issue 2
container_start_page 161
container_title Scripta materialia
container_volume 67
creator Li, D.
Qin, X.Y.
Dou, Y.C.
Li, X.Y.
Sun, R.R.
Wang, Q.Q.
Li, L.L.
Xin, H.X.
Wang, N.
Wang, N.N.
Song, C.J.
Liu, Y.F.
Zhang, J.
description A chemical route combined with a subsequent spark plasma sintering technique was successfully utilized to synthesize n-type Se-substituted ternary Bi2Te3−xSex (0⩽x⩽0.6). We investigated the effect of Se doping on the thermoelectric properties of the Bi2Te3 nanostructured bulk materials. The results indicate that Se doping is an efficient way to reduce the thermal conductivity as compared to that of Bi2Te3 presumably due to enhanced (dopant) scattering of phonons. The maximum thermoelectric figure-of-merit, ZT, is 0.7 at 485K for Bi2Te2.55Se0.45.
doi_str_mv 10.1016/j.scriptamat.2012.04.005
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subjects Dopants
Doping
Electrical properties
Nanocrystalline materials
Nanocrystals
Nanostructure
Scattering
Spark plasma sintering
Thermal conductivity
Thermoelectricity
X-ray diffraction
title Thermoelectric properties of hydrothermally synthesized Bi2Te3−xSex nanocrystals
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