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Single-crystal Wires Based on Doped Bi for Anisotropic Thermoelectric Microgenerators

Published online by Cambridge University Press:  01 February 2011

Albina Alexandr Nikolaeva ,
Leonid A Konopko ,
Tito E Huber  and
Ana K Tsurkan
Albina Alexandr Nikolaeva
Affiliation:
A.Nikolaeva@iieti.asm.md, IIETI, ASM, Chisinau, Moldova
Leonid A Konopko
Affiliation:
leonid.konopko@iieti.asm.md, IIETI, ASM, Chisinau, Moldova
Tito E Huber
Affiliation:
thuber@Howard.edu, Howard University, Department of Chemistry, Washington, Washington, United States
Ana K Tsurkan
Affiliation:
aniuta@smtp.ru, IIETI, ASM, Chisinau, Moldova
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Abstract

In this work, we have studied the possibility to use a microwire of BiSn to design an anisotropic thermoelectric generator. The glass-coated microwire of pure and Sn-doped bismuth was obtained by the Ulitovsky method; it was a cylindrical single-crystal with orientation (1011) along the wire axis; the C3 axis was deflected at an angle of 70° to the microwire axis. It is found that doping of bismuth wires with tin increases the thermopower anisotropy in comparison with Bi by a factor of 2 – 3 in the temperature range of 200 – 300 K. According to the preliminary results, for a Bi microwire with a diameter of 10 μm with a glass coating of 35 μm, the transverse thermopower is ∼ 150 μV/(K*cm); for BiSn, 300 μV/(K*cm).The design of an anisotropic thermogenerator based on BiSn microwire is proposed. The miniature thermogenerator will be efficient for power supply of devices with low useful current.

In addition to the considerable thermopower anisotropy of BiSn wires in a glass coating, they exhibit stable thermoelectric properties, high mechanical strength and flexibility, which allows designing thermoelectric devices of various configurations on their basis.

Keywords

Bithermoelectricitynanostructure
Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 1267: Symposium DD – Thermoelectric Materials 2010-Growth, Properties, Novel Characterization Methods and Applications , 2010 , 1267-DD10-09
Copyright
Copyright © Materials Research Society 2010

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