Modified structures and improved thermoelectric property in Ag-added polycrystalline In2Se3

J. L. Cui; X. J. Zhang; Y. Deng; H. Fu; Y. M. Yan; Y. L. Gao; Y. Y. Li

doi:10.1016/j.scriptamat.2010.11.026

Modified structures and improved thermoelectric property in Ag-added polycrystalline In₂Se₃

J. L. Cui
, X. J. Zhang
, Y. Deng
, H. Fu
, Y. M. Yan
, Y. L. Gao
, Y. Y. Li

School of Materials Science and Engineering

Ningbo University of Technology
China University of Mining and Technology
Taiyuan University of Technology

Research output: Contribution to journal › Article › peer-review

28 Scopus citations

Abstract

α-In₂Se₃ has a two-layer structure with 1/3 of the cation sites vacant. After addition of Ag to In₂Se₃, we identified the main phase as In₅AgSe₈ with nanoinclusions of InSe forming in situ. Ag incorporation favors the formation of Ag₂Se slab, which is largely responsible for the decrease in band gap E_g, accounting for much of the increase (decrease) in electrical conductivity (Seebeck coefficient). This effect, combined with a reduction in lattice thermal conductivity, results in a big improvement in thermoelectric property over α-In₂Se₃.

Original language	English
Pages (from-to)	510-512
Number of pages	3
Journal	Scripta Materialia
Volume	64
Issue number	6
DOIs	https://doi.org/10.1016/j.scriptamat.2010.11.026
State	Published - Mar 2011

Keywords

Band gap
Structural modifications
Thermoelectric properties

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10.1016/j.scriptamat.2010.11.026

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title = "Modified structures and improved thermoelectric property in Ag-added polycrystalline In2Se3",

abstract = "α-In2Se3 has a two-layer structure with 1/3 of the cation sites vacant. After addition of Ag to In2Se3, we identified the main phase as In5AgSe8 with nanoinclusions of InSe forming in situ. Ag incorporation favors the formation of Ag2Se slab, which is largely responsible for the decrease in band gap Eg, accounting for much of the increase (decrease) in electrical conductivity (Seebeck coefficient). This effect, combined with a reduction in lattice thermal conductivity, results in a big improvement in thermoelectric property over α-In2Se3.",

keywords = "Band gap, Structural modifications, Thermoelectric properties",

author = "Cui, \{J. L.\} and Zhang, \{X. J.\} and Y. Deng and H. Fu and Yan, \{Y. M.\} and Gao, \{Y. L.\} and Li, \{Y. Y.\}",

year = "2011",

month = mar,

doi = "10.1016/j.scriptamat.2010.11.026",

language = "英语",

volume = "64",

pages = "510--512",

journal = "Scripta Materialia",

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TY - JOUR

T1 - Modified structures and improved thermoelectric property in Ag-added polycrystalline In2Se3

AU - Cui, J. L.

AU - Zhang, X. J.

AU - Deng, Y.

AU - Fu, H.

AU - Yan, Y. M.

AU - Gao, Y. L.

AU - Li, Y. Y.

PY - 2011/3

Y1 - 2011/3

N2 - α-In2Se3 has a two-layer structure with 1/3 of the cation sites vacant. After addition of Ag to In2Se3, we identified the main phase as In5AgSe8 with nanoinclusions of InSe forming in situ. Ag incorporation favors the formation of Ag2Se slab, which is largely responsible for the decrease in band gap Eg, accounting for much of the increase (decrease) in electrical conductivity (Seebeck coefficient). This effect, combined with a reduction in lattice thermal conductivity, results in a big improvement in thermoelectric property over α-In2Se3.

AB - α-In2Se3 has a two-layer structure with 1/3 of the cation sites vacant. After addition of Ag to In2Se3, we identified the main phase as In5AgSe8 with nanoinclusions of InSe forming in situ. Ag incorporation favors the formation of Ag2Se slab, which is largely responsible for the decrease in band gap Eg, accounting for much of the increase (decrease) in electrical conductivity (Seebeck coefficient). This effect, combined with a reduction in lattice thermal conductivity, results in a big improvement in thermoelectric property over α-In2Se3.

KW - Band gap

KW - Structural modifications

KW - Thermoelectric properties

UR - https://www.scopus.com/pages/publications/78651286122

U2 - 10.1016/j.scriptamat.2010.11.026

DO - 10.1016/j.scriptamat.2010.11.026

M3 - 文章

AN - SCOPUS:78651286122

SN - 1359-6462

VL - 64

SP - 510

EP - 512

JO - Scripta Materialia

JF - Scripta Materialia

IS - 6

ER -

Modified structures and improved thermoelectric property in Ag-added polycrystalline In₂Se₃

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Keywords

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