Thermoelectric power factor of ternary single-crystalline Sb 2Te3- and Bi2Te3-based nanowires

Baessler S, Boehnert T, Gooth J, Schumacher C, Pippel E, Nielsch K (2013)

Publication Type: Journal article

Publication year: 2013

Journal

Nanotechnology Institute of Physics: Hybrid Open Access

Book Volume: 24

Article Number: 495402

Journal Issue: 49

DOI: 10.1088/0957-4484/24/49/495402

Abstract

Nanowires of bismuth antimony telluride and bismuth telluride selenide (Bi15Sb29Te56 and Bi38Te 55Se7) were grown by template-based pulsed electrodeposition. The composition and the crystallinity of the nanowires were determined by high-resolution transmission electron microscopy. The thermoelectric properties (Seebeck coefficient and electrical conductivity) of single p- and n-type nanowires, with diameter 80 nm and 200 nm, respectively, were determined as a function of temperature before and during heating in a helium atmosphere up to 300 K along the growth direction of the nanowires. After additional annealing in a tellurium atmosphere at 525 K, significantly enhanced transport properties are observed. Bulk-like power factors are achieved. In Bi38Te55Se7 nanowires, the Seebeck coefficients increase to -115 μV K^-1 and the thermoelectric power factors increase to 2820 μW K^-2 m^-1 at room temperature. In Bi15Sb29Te56 nanowires, Seebeck coefficients of up to S =+ 156 μV K^-1 and power factors of up to 1750 μW K^-2 m^-1 are obtained at room temperature. © 2013 IOP Publishing Ltd.

Involved external institutions

Universität Hamburg (UHH)

Germany (DE) Max-Planck-Institut für Mikrostrukturphysik (MSP) / Max Planck Institute for Microstructure Physics

Germany (DE)

How to cite

APA:

Baessler, S., Boehnert, T., Gooth, J., Schumacher, C., Pippel, E., & Nielsch, K. (2013). Thermoelectric power factor of ternary single-crystalline Sb 2Te3- and Bi2Te3-based nanowires. Nanotechnology, 24(49). https://dx.doi.org/10.1088/0957-4484/24/49/495402

MLA:

Baessler, Svenja, et al. "Thermoelectric power factor of ternary single-crystalline Sb 2Te3- and Bi2Te3-based nanowires." Nanotechnology 24.49 (2013).

BibTeX: Download