Ⅰ掺杂提高铅固溶立方相AgBiSe<sub>2</sub>热电性能

doi:10.11896/cldb.21060082

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Abstract Thermoelectric materials, which can achieve direct conversion between electricity and heat, have attracted increasing attention in recent years. In this paper, polycrystalline bulk samples of Ag_1-x/2Bi_1-x/2Pb_xSe₂(x=0, 0.2, 0.25, 0.3)were prepared from high purity elements and densified by spark plasma sintering. The X-ray diffraction analysis indicates that the alloying of Pb element can lead to the phase transition from hexagonal phase to cubic phase at room temperature. The participation of Pb can result in the decrease of lattice thermal conductivity and further enhance thermoelectric properties. Due to the relatively low lattice thermal conductivity and high ZT value, Ag_0.875Bi_0.875Pb_0.25Se₂ is selected as matrix material, and its thermoelectric properties are further enhanced via I doping. The ZT value of Ag_0.875Bi_0.875Pb_0.25Se_1.97I_0.03 at 773 K is about 0.72, which is nearly two times higher than that of pristine AgBiSe₂.

Key words： thermoelectric material thermal conductivity Seebeck coefficient electrical conductivity

Published: 10 March 2023 Online: 2023-03-14

CLC number:

TB321

Fund:National Natural Science Foundation Youth Fund of China (21601021) and Shandong Jitong University Strat-up Fund (BS2018027).

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	LIU Xiaocun
	PAN Mingyan

Cite this article:

LIU Xiaocun,PAN Mingyan. Enhanced Thermoelectric Properties in Pb-alloyed Cubic Phase AgBiSe₂ via I Doping[J]. Materials Reports, 2023, 37(5): 21060082-5.

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http://www.mater-rep.com/EN/10.11896/cldb.21060082 OR http://www.mater-rep.com/EN/Y2023/V37/I5/21060082

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