Modified structures and improved thermoelectric property in Ag-added polycrystalline In 2Se 3

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 In 2Se 3

J.L Cui, X.J Zhang + Show 5 more

https://doi.org/10.1016/j.scriptamat.2010.11.026

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Journal: Scripta Materialia	Publication Date: Nov 18, 2010
Citations: 22

Affiliation: Beihang University, Ningbo University of Technology, China University of Mining and Technology, Taiyuan University of Technology

#Reduction In Lattice Thermal Conductivity #Lattice Thermal Conductivity + Show 8 more

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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.

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