Thermoelectric characteristics of solvothermally prepared (Bi,Sb) 2Te3 mats containing nanosize of sheet-tubes

Chia Jyi Liu, Gao Jhih Liu, Chun Wei Tsao, Yu Feng Lu, Li Shin Chang

Research output: Chapter in Book/Report/Conference proceedingConference contribution

4 Citations (Scopus)

Abstract

We report thermoelectric characterization of Bi2-xSb xTe3 (x = 0.5, 1.0, and 1.5) synthesized by a solvothermal method using DMF as solvent. For Bi2Te3, the size of the edge and thickness of the hexagonal nanoplatelets are 200-250 nm and 20-25 nm, respectively. Bi2Te3 nanosheets appear to grow epitaxially from the surface of the Te tubes, which forms in the first step and acts as the template for the formation of the nanostructure. Upon doping with Sb, the morphology of Bi1.5Sb0.5Te3 changes to a cluster of nanoparticles with the size of ∼100 nm. The morphology of Bi 0.5Sb1.5Te3 consists of mainly nanoplatelets with a size of less than 100 nm and warped nanosheets growing along the Te tube. The nominal composition of Bi2Te3 mats containing sheet-tubes shows a negative thermopower of ca. -94 μV/K at 280 K, whereas Bi0.5Sb1.5Te3 shows a positive thermopower of ca. 200 μV/K at 280 K.

Original languageEnglish
Title of host publicationProceedings ICT'07 - 26th International Conference on Thermoelectrics
Pages30-33
Number of pages4
DOIs
Publication statusPublished - 2007 Dec 1
EventICT'07 - 26th International Conference on Thermoelectrics - Jeju, Korea, Republic of
Duration: 2007 Jun 32007 Jun 7

Other

OtherICT'07 - 26th International Conference on Thermoelectrics
CountryKorea, Republic of
CityJeju
Period07-06-0307-06-07

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All Science Journal Classification (ASJC) codes

  • Engineering(all)

Cite this

Liu, C. J., Liu, G. J., Tsao, C. W., Lu, Y. F., & Chang, L. S. (2007). Thermoelectric characteristics of solvothermally prepared (Bi,Sb) 2Te3 mats containing nanosize of sheet-tubes. In Proceedings ICT'07 - 26th International Conference on Thermoelectrics (pp. 30-33). [4569416] https://doi.org/10.1109/ICT.2007.4569416