Template-free solvothermal synthesis and enhanced thermoelectric performance of Sb(2)Te(3) nanosheets

A simple template-free solvothermal approach has been developed for the fabrication of Sb(2)Te(3) thermoelectric materials. Single-crystalline Sb(2)Te(3) nanosheets are 200-300 nm in edge lengths and only 18-20 nm thick. The nanosheets with no residual organics were hot pressing sintered (HPS) to a...

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Published inJournal of alloys and compounds Vol. 558; pp. 6 - 10
Main Authors Sun, Shaolin, Peng, Jing, Jin, Renxi, Song, Shuyan, Zhu, Pinwen, Xing, Yan
Format Journal Article
LanguageEnglish
Published 05.05.2013
Subjects
Alloys
Hot pressing
Nanocomposites
Nanomaterials
Nanostructure
Resistivity
Sintering
Thermoelectricity
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Summary:A simple template-free solvothermal approach has been developed for the fabrication of Sb(2)Te(3) thermoelectric materials. Single-crystalline Sb(2)Te(3) nanosheets are 200-300 nm in edge lengths and only 18-20 nm thick. The nanosheets with no residual organics were hot pressing sintered (HPS) to a p-type nanostructured bulk material, and it still consisted of Sb(2)Te(3) nanosheets after HPS and thermoelectric (TE) properties measurements. Relatively good TE properties have been achieved in the Sb(2)Te(3) nanosheet sintered bulk sample from 320 K to 565 K: high electrical conductivity sigma (1.69-2.30) x 10(4) Phi (-1) m(-1) high Seebeck coefficient S (173-199 mu VK(-1) ) and low thermal conductivity k (0.66-0.82 Wm(-1) K(-1) ). Consequently, the dimensionless thermoelectric figure of merit (2T) of 0.57 at 565 K was achieved. Meanwhile, the maximum in ZT was shifted significantly to higher temperature.
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ISSN:0925-8388