Reproducible high thermoelectric figure of merit in Ag2Se

Ag2Se is a potentially useful material with interesting magnetoresistive and thermoelectric properties. In several recent studies, the thermoelectric figure of merit (zT) of Ag2Se has been shown to approach 1 near 380 K (i.e., about 25 K below its superionic transition temperature). However, what pl...

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Bibliographic Details
Published inApplied physics letters Vol. 122; no. 16
Main Authors Jakhar, Navita, Kedia, Dinesh Kumar, Kumar, Ankit, Saurabh, Kumar, Singh, Surjeet
Format Journal Article
LanguageEnglish
Published Melville American Institute of Physics 17.04.2023
Subjects
Applied physics
Figure of merit
High temperature
Magnetic properties
Magnetoresistivity
Reproducibility
Room temperature
Thermoelectricity
Transition temperature
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Summary:Ag2Se is a potentially useful material with interesting magnetoresistive and thermoelectric properties. In several recent studies, the thermoelectric figure of merit (zT) of Ag2Se has been shown to approach 1 near 380 K (i.e., about 25 K below its superionic transition temperature). However, what plagues the use of Ag2Se in real life applications is its sample dependence and very poor reproducibility. In a recent work, it is clearly established that the root cause of this is Ag migration during high-temperature sintering or melting. Here, we show that high-density Ag2Se samples with high and reproducible zT (0.92 at 370 K) can be prepared by simple all-room-temperature techniques. The ease of sample preparation and high zT along with excellent reproducibility make Ag2Se a promising material for near-room-temperature applications.
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ISSN:0003-6951
1077-3118
DOI:10.1063/5.0143678