Thermoelectric property studies on CuxBi2SeS2with nano-scale precipitates Bi2S3

L. Li; Y. Liu; Jiyan Dai; H. X. Zhu; A. J. Hong; X. H. Zhou; Z. F. Ren; J. M. Liu

doi:10.1016/j.nanoen.2015.01.020

Thermoelectric property studies on Cu_xBi₂SeS₂with nano-scale precipitates Bi₂S₃

L. Li, Y. Liu, Jiyan Dai, H. X. Zhu, A. J. Hong, X. H. Zhou, Z. F. Ren, J. M. Liu

Research output: Journal article publication › Journal article › Academic research › peer-review

34 Citations (Scopus)

Abstract

The microscopic mechanisms for higher thermoelectric performance of cost competitive rock salt compound Bi2SeS2were investigated. A low doping of Cu as an n-type dopant was conducted in order to optimize the band structure and improve the electrical conductivity. It was revealed that this compound exhibits a Seebeck coefficient higher than 300μVK-1, which sustains above 100μVK-1even with Cu doping, leading to a higher power factor. The microstructural characterizations revealed nano-scale Bi2S3precipitates in the CuxBi2SeS2matrix, beneficial to the lower lattice thermal conductivity that is insensitive to the Cu doping. A thermoelectric figure-of-merit factor ZT of ~0.7 at 450°C in accompanying with the power factor of ~5.36μWcm-1K-2was obtained under the optimized doping level, enabling this environmentally friendly compound interesting for thermoelectric power generation applications.

Original language	English
Pages (from-to)	447-456
Number of pages	10
Journal	Nano Energy
Volume	12
DOIs	https://doi.org/10.1016/j.nanoen.2015.01.020
Publication status	Published - 1 Mar 2015

Keywords

Bi SeS 2 2
Cu doping
Nano-scale Bi S precipitates 2 3
Thermoelectric

ASJC Scopus subject areas

Renewable Energy, Sustainability and the Environment
Materials Science(all)
Electrical and Electronic Engineering

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

More information

10.1016/j.nanoen.2015.01.020

Cite this

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title = "Thermoelectric property studies on CuxBi2SeS2with nano-scale precipitates Bi2S3",

abstract = "The microscopic mechanisms for higher thermoelectric performance of cost competitive rock salt compound Bi2SeS2were investigated. A low doping of Cu as an n-type dopant was conducted in order to optimize the band structure and improve the electrical conductivity. It was revealed that this compound exhibits a Seebeck coefficient higher than 300μVK-1, which sustains above 100μVK-1even with Cu doping, leading to a higher power factor. The microstructural characterizations revealed nano-scale Bi2S3precipitates in the CuxBi2SeS2matrix, beneficial to the lower lattice thermal conductivity that is insensitive to the Cu doping. A thermoelectric figure-of-merit factor ZT of ~0.7 at 450°C in accompanying with the power factor of ~5.36μWcm-1K-2was obtained under the optimized doping level, enabling this environmentally friendly compound interesting for thermoelectric power generation applications.",

keywords = "Bi SeS 2 2, Cu doping, Nano-scale Bi S precipitates 2 3, Thermoelectric",

author = "L. Li and Y. Liu and Jiyan Dai and Zhu, {H. X.} and Hong, {A. J.} and Zhou, {X. H.} and Ren, {Z. F.} and Liu, {J. M.}",

year = "2015",

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doi = "10.1016/j.nanoen.2015.01.020",

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T1 - Thermoelectric property studies on CuxBi2SeS2with nano-scale precipitates Bi2S3

AU - Li, L.

AU - Liu, Y.

AU - Dai, Jiyan

AU - Zhu, H. X.

AU - Hong, A. J.

AU - Zhou, X. H.

AU - Ren, Z. F.

AU - Liu, J. M.

PY - 2015/3/1

Y1 - 2015/3/1

N2 - The microscopic mechanisms for higher thermoelectric performance of cost competitive rock salt compound Bi2SeS2were investigated. A low doping of Cu as an n-type dopant was conducted in order to optimize the band structure and improve the electrical conductivity. It was revealed that this compound exhibits a Seebeck coefficient higher than 300μVK-1, which sustains above 100μVK-1even with Cu doping, leading to a higher power factor. The microstructural characterizations revealed nano-scale Bi2S3precipitates in the CuxBi2SeS2matrix, beneficial to the lower lattice thermal conductivity that is insensitive to the Cu doping. A thermoelectric figure-of-merit factor ZT of ~0.7 at 450°C in accompanying with the power factor of ~5.36μWcm-1K-2was obtained under the optimized doping level, enabling this environmentally friendly compound interesting for thermoelectric power generation applications.

AB - The microscopic mechanisms for higher thermoelectric performance of cost competitive rock salt compound Bi2SeS2were investigated. A low doping of Cu as an n-type dopant was conducted in order to optimize the band structure and improve the electrical conductivity. It was revealed that this compound exhibits a Seebeck coefficient higher than 300μVK-1, which sustains above 100μVK-1even with Cu doping, leading to a higher power factor. The microstructural characterizations revealed nano-scale Bi2S3precipitates in the CuxBi2SeS2matrix, beneficial to the lower lattice thermal conductivity that is insensitive to the Cu doping. A thermoelectric figure-of-merit factor ZT of ~0.7 at 450°C in accompanying with the power factor of ~5.36μWcm-1K-2was obtained under the optimized doping level, enabling this environmentally friendly compound interesting for thermoelectric power generation applications.

KW - Bi SeS 2 2

KW - Cu doping

KW - Nano-scale Bi S precipitates 2 3

KW - Thermoelectric

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DO - 10.1016/j.nanoen.2015.01.020

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VL - 12

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EP - 456

JO - Nano Energy

JF - Nano Energy

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