Please use this identifier to cite or link to this item: http://essuir.sumdu.edu.ua/handle/123456789/35821
Or use following links to share this resource in social networks: Recommend this item
Title Effect of Composition on Optical and Thermoelectric Properties of Microstructured p-type (Bi2Te3)x(Sb2Te3)1 – x Alloys
Authors Sharma, K.
Lal, M.
Gumber, V.K.
Kumar, A.
Chaudary, N.
Goyal, N.
ORCID
Keywords Optical band gap
Microstructure
Electrical
Thermoelectric properties
Type Article
Date of Issue 2014
URI http://essuir.sumdu.edu.ua/handle/123456789/35821
Publisher Sumy State University
License
Citation Effect of Composition on Optical and Thermoelectric Properties of Microstructured p-type (Bi2Te3)x(Sb2Te3)1 – x Alloys [Текст] / K. Sharma, M. Lal, V.K. Gumber et al. // Журнал нано- та електронної фізики. — 2014. — Т.6, №1. — 01007.
Abstract Semiconducting (Bi2Te3)x(Sb2Te3)1 – x alloys are among the best thermoelectric materials available today near room temperature. This property is largely attributed to compositional variations, resulting in improved figure of merit. Considering this, present study aimed at characterizing the optical and thermoelectric properties of microstructured p-type (Bi2Te3)x(Sb2Te3)1 – x alloys for enhanced thermoelectric efficiency. High performance microstructured p-type (Bi2Te3)x(Sb2Te3)1 – x alloys were prepared by melting technique. The phase, optical band gap, microstructure, carrier type concentration and thermoelectric properties of the prepared alloys were systematically investigated by X-ray diffraction, Fourier transform infrared spectroscopy, scanning electron microscopy, hot probe p-n type tester, four-probe method, κ-probe method and Seebeck coefficient measurement system. The electrical conductivity and Seebeck coefficient were measured in the temperature range 298-473 K to elucidate the Sb content effect on the thermoelectric properties of the p-type (Bi2Te3)x(Sb2Te3)1 – x alloys. The optical band gap decreased with increasing Sb content. Also, with the increase of Sb content, the electrical conductivity increased substantially, the thermal conductivity increased significantly and the Seebeck coefficient decreased marginally, which lead to a great improvement in the thermoelectric figure of merit. The maximum power factor of 3.2 × 10 – 3 Wm – 1K – 2 and figure of merit of 0.72 were obtained at 300 K for the composition of 15 %Bi2Te3-85 %Sb2Te3. When you are citing the document, use the following link http://essuir.sumdu.edu.ua/handle/123456789/35821
Appears in Collections: Журнал нано- та електронної фізики (Journal of nano- and electronic physics)

Views

Argentina Argentina
1
Australia Australia
1
China China
5
Cyprus Cyprus
1
Finland Finland
1
France France
1267
Germany Germany
1912441
Greece Greece
17733
Ireland Ireland
3824872
Japan Japan
428878379
Lithuania Lithuania
1
Netherlands Netherlands
1
Russia Russia
8
Singapore Singapore
1
Turkey Turkey
4
Ukraine Ukraine
52099310
United Kingdom United Kingdom
26318156
United States United States
1422925981
Unknown Country Unknown Country
52099309
Vietnam Vietnam
17731

Downloads

China China
18
Germany Germany
1912442
Ireland Ireland
1
Japan Japan
1
Lithuania Lithuania
1
Malaysia Malaysia
1
Singapore Singapore
1
Ukraine Ukraine
156296692
United Kingdom United Kingdom
1
United States United States
857756761
Unknown Country Unknown Country
56
Vietnam Vietnam
1

Files

File Size Format Downloads
Sharma_Electrical.pdf 674.86 kB Adobe PDF 1015965976

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.