Anisotropic layered Bi2 Te3 -In2 Te3 composites: Control of interface density for tuning of thermoelectric properties

Liu D, Li X, Borlido PMDC, Botti S, Schmechel R, Rettenmayr M (2017)

Publication Type: Journal article

Publication year: 2017

Journal

Scientific Reports Nature Publishing Group: Open Access Journals - Option B

Book Volume: 7

Article Number: 43611

DOI: 10.1038/srep43611

Abstract

Layered (Bi1-xInx) 2 Te3 -In2 Te3 (x = 0.075) composites of pronounced anisotropy in structure and thermoelectric properties were produced by zone melting and subsequent coherent precipitation of In2 Te3 from a (Bi1-xInx) 2 Te3 (x > 0.075) matrix. Employing solid state phase transformation, the Bi2 Te3 /In2 Te3 interface density was tuned by modifying the driving force for In2 Te3 precipitation. The structure-property relationship in this strongly anisotropic material is characterized thoroughly and systematically for the first time. Unexpectedly, with increasing Bi2 Te3 /In2 Te3 interface density, an increase in electrical conductivity and a decrease in the absolute Seebeck coefficient were found. This is likely to be due to electron accumulation layers at the Bi2 Te3 /In2 Te3 interfaces and the interplay of bipolar transport in Bi2 Te3. Significantly improved thermoelectric properties of Bi2 Te3 -In2 Te3 composites as compared to the single phase (Bi1-xInx) 2 Te3 solid solution are obtained.

Involved external institutions

Friedrich-Schiller-Universität Jena DE Germany (DE) Harbin Institute of Technology (HIT) / 哈工大 CN China (CN) Universität Duisburg-Essen (UDE) DE Germany (DE)

How to cite

APA:

Liu, D., Li, X., Borlido, P.M.D.C., Botti, S., Schmechel, R., & Rettenmayr, M. (2017). Anisotropic layered Bi2 Te3 -In2 Te3 composites: Control of interface density for tuning of thermoelectric properties. Scientific Reports, 7. https://doi.org/10.1038/srep43611

MLA:

Liu, Dongmei, et al. "Anisotropic layered Bi2 Te3 -In2 Te3 composites: Control of interface density for tuning of thermoelectric properties." Scientific Reports 7 (2017).

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