Citation: CHEN Yan-Chun, LIU Peng-Fei, CHEN Ling, WU Li-Ming. Thermoelectric Properties of Ag-doped In₄Se_2.95 Polycrystalline Compounds[J]. Chinese Journal of Structural Chemistry, ;2016, 35(12): 1868-1875. doi: 10.14102/j.cnki.0254-5861.2011-1224 shu

Thermoelectric Properties of Ag-doped In₄Se_2.95 Polycrystalline Compounds

CHEN Yan-Chun ^a,c ,
LIU Peng-Fei ^b ,
CHEN Ling ^a,b ,
WU Li-Ming ^b,*,,

a.
Shanghai Institute of Microsystem and Information Technology, Chinese Academy of Sciences, Shanghai 200050, China
b.
Key Laboratory of Optoelectronic Materials Chemistry and Physics, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou 350002, China
c.
School of Physical Science and Technology, Shanghai Tech University, Shanghai 201210, China

Corresponding author: WU Li-Ming, liming_wu@fjirsm.ac.cn
Received Date: 30 March 2016

Fund Project: National Natural Science Foundation of China 91422303, 21225104, 21571020, 21233009, and 21301175

Figures(3)

In₄Se₃-based materials are noticeable n-type thermoelectric materials because of lead-free and intrinsically low lattice thermal conductivity, but the In₄Se_3-δ crystals (with Se-deficiency, δ) suffer strong anisotropy and cleavage habit. Thus the researches on polycrystalline In₄Se₃-based materials are of great importance. Herein, we experimentally and theoretically investigated the thermoelectric properties of In_4-xSe_2.95Ag_x polycrystalline compounds. Ag occupying the intercalation or In4 site is energetically most favorable in light of the density functional theory calculation. The maximum solubility of Ag (x_m) is very low (x_m<0.03) and the experimental result indicates that the electrical transport behavior of In_4-xSe_2.95Ag_x compounds is not significantly optimized by Ag-dopant. Consequently, a maximum ZT of 0.92 at 723 K is obtained by In_3.98Se_2.95Ag_0.02 compound that represents 15% enhancement over that of the un-doped one which benefits from the slightly enhanced power factor and the reduced total thermal conductivity.
- In₄Se_2.95,
- Ag doping,
- thermoelectric property
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沈阳化工大学材料科学与工程学院沈阳 110142

Thermoelectric Properties of Ag-doped In4Se2.95 Polycrystalline Compounds

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通讯作者: 陈斌, bchen63@163.com

Thermoelectric Properties of Ag-doped In₄Se_2.95 Polycrystalline Compounds