Study of Sb effects on the electrical properties of Ni doped CoSb3 nanostructures

This project was designed to investigate the antimony content effect and nickel doping effect on the electrical properties of Ni-doped CoSb3 ( Ni1.25Co2.75Sb12) nanostructures. The purpose was to study the mechanism and to optimize the antimony content in the nanostructure to improve the thermoelect...

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Main Author: Du, Hongtao.
Other Authors: Hng Huey Hoon
Format: Final Year Project
Language:English
Published: 2009
Subjects:
Online Access:http://hdl.handle.net/10356/15343
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Institution: Nanyang Technological University
Language: English
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spelling sg-ntu-dr.10356-153432023-03-04T15:40:10Z Study of Sb effects on the electrical properties of Ni doped CoSb3 nanostructures Du, Hongtao. Hng Huey Hoon School of Materials Science and Engineering DRNTU::Engineering This project was designed to investigate the antimony content effect and nickel doping effect on the electrical properties of Ni-doped CoSb3 ( Ni1.25Co2.75Sb12) nanostructures. The purpose was to study the mechanism and to optimize the antimony content in the nanostructure to improve the thermoelectric performance. Ni-doped CoSb3 nanoparticles were synthesized using a modified polyol process with three different initial molar ratio of (Ni + Co) : Sb as 1:4.5, 1:4.75, and 1:5 respectively. Upon successful synthesis and hot pressing of the samples, they were characterized using various techniques. SEM, EDX, and XRD together with the measured electrical parameters obtained from standard four probe testing were analyzed and compared. The results showed that the sample with initial molar ratio of 1:5 has the highest power of 1.84×10-3 W/m K2 at around 458 °C. Nickel doping gave rise to n-type character in the sample and increased the carrier concentration by one order of magnitude. Antimony compensation effect also contributed to an increase in power factor. Electrical properties were improved with the combination of the two parameters. Bachelor of Engineering (Materials Engineering) 2009-04-27T08:49:13Z 2009-04-27T08:49:13Z 2009 2009 Final Year Project (FYP) http://hdl.handle.net/10356/15343 en 47 p. application/pdf
institution Nanyang Technological University
building NTU Library
continent Asia
country Singapore
Singapore
content_provider NTU Library
collection DR-NTU
language English
topic DRNTU::Engineering
spellingShingle DRNTU::Engineering
Du, Hongtao.
Study of Sb effects on the electrical properties of Ni doped CoSb3 nanostructures
description This project was designed to investigate the antimony content effect and nickel doping effect on the electrical properties of Ni-doped CoSb3 ( Ni1.25Co2.75Sb12) nanostructures. The purpose was to study the mechanism and to optimize the antimony content in the nanostructure to improve the thermoelectric performance. Ni-doped CoSb3 nanoparticles were synthesized using a modified polyol process with three different initial molar ratio of (Ni + Co) : Sb as 1:4.5, 1:4.75, and 1:5 respectively. Upon successful synthesis and hot pressing of the samples, they were characterized using various techniques. SEM, EDX, and XRD together with the measured electrical parameters obtained from standard four probe testing were analyzed and compared. The results showed that the sample with initial molar ratio of 1:5 has the highest power of 1.84×10-3 W/m K2 at around 458 °C. Nickel doping gave rise to n-type character in the sample and increased the carrier concentration by one order of magnitude. Antimony compensation effect also contributed to an increase in power factor. Electrical properties were improved with the combination of the two parameters.
author2 Hng Huey Hoon
author_facet Hng Huey Hoon
Du, Hongtao.
format Final Year Project
author Du, Hongtao.
author_sort Du, Hongtao.
title Study of Sb effects on the electrical properties of Ni doped CoSb3 nanostructures
title_short Study of Sb effects on the electrical properties of Ni doped CoSb3 nanostructures
title_full Study of Sb effects on the electrical properties of Ni doped CoSb3 nanostructures
title_fullStr Study of Sb effects on the electrical properties of Ni doped CoSb3 nanostructures
title_full_unstemmed Study of Sb effects on the electrical properties of Ni doped CoSb3 nanostructures
title_sort study of sb effects on the electrical properties of ni doped cosb3 nanostructures
publishDate 2009
url http://hdl.handle.net/10356/15343
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