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Title: High Electron Mobility and Disorder Induced by Silver Ion Migration Lead to Good Thermoelectric Performance in the Argyrodite Ag 8 SiSe 6

Abstract

Superionic chalcopyrites have recently attracted interest in their use as potential thermoelectric materials because of extraordinary low thermal conductivities. To overcome long-term stability issues in thermoelectric generators using superionic materials at evaluated temperatures, materials need to be found that show good thermoelectric performance at moderate temperatures. Here, we present the structural and thermoelectric properties of the argyrodite Ag 8SiSe 6, which exhibits promising thermoelectric performance close to room temperature.

Authors:
; ; ; ; ORCiD logo; ; ; ORCiD logo
Publication Date:
Research Org.:
Argonne National Lab. (ANL), Argonne, IL (United States). Advanced Photon Source (APS)
Sponsoring Org.:
FOREIGN
OSTI Identifier:
1373783
Resource Type:
Journal Article
Resource Relation:
Journal Name: Chemistry of Materials; Journal Volume: 29; Journal Issue: 11
Country of Publication:
United States
Language:
ENGLISH
Subject:
36 MATERIALS SCIENCE

Citation Formats

Heep, Barbara K., Weldert, Kai S., Krysiak, Yasar, Day, Tristan W., Zeier, Wolfgang G., Kolb, Ute, Snyder, G. Jeffrey, and Tremel, Wolfgang. High Electron Mobility and Disorder Induced by Silver Ion Migration Lead to Good Thermoelectric Performance in the Argyrodite Ag 8 SiSe 6. United States: N. p., 2017. Web. doi:10.1021/acs.chemmater.7b00767.
Heep, Barbara K., Weldert, Kai S., Krysiak, Yasar, Day, Tristan W., Zeier, Wolfgang G., Kolb, Ute, Snyder, G. Jeffrey, & Tremel, Wolfgang. High Electron Mobility and Disorder Induced by Silver Ion Migration Lead to Good Thermoelectric Performance in the Argyrodite Ag 8 SiSe 6. United States. doi:10.1021/acs.chemmater.7b00767.
Heep, Barbara K., Weldert, Kai S., Krysiak, Yasar, Day, Tristan W., Zeier, Wolfgang G., Kolb, Ute, Snyder, G. Jeffrey, and Tremel, Wolfgang. Fri . "High Electron Mobility and Disorder Induced by Silver Ion Migration Lead to Good Thermoelectric Performance in the Argyrodite Ag 8 SiSe 6". United States. doi:10.1021/acs.chemmater.7b00767.
@article{osti_1373783,
title = {High Electron Mobility and Disorder Induced by Silver Ion Migration Lead to Good Thermoelectric Performance in the Argyrodite Ag 8 SiSe 6},
author = {Heep, Barbara K. and Weldert, Kai S. and Krysiak, Yasar and Day, Tristan W. and Zeier, Wolfgang G. and Kolb, Ute and Snyder, G. Jeffrey and Tremel, Wolfgang},
abstractNote = {Superionic chalcopyrites have recently attracted interest in their use as potential thermoelectric materials because of extraordinary low thermal conductivities. To overcome long-term stability issues in thermoelectric generators using superionic materials at evaluated temperatures, materials need to be found that show good thermoelectric performance at moderate temperatures. Here, we present the structural and thermoelectric properties of the argyrodite Ag8SiSe6, which exhibits promising thermoelectric performance close to room temperature.},
doi = {10.1021/acs.chemmater.7b00767},
journal = {Chemistry of Materials},
number = 11,
volume = 29,
place = {United States},
year = {Fri May 26 00:00:00 EDT 2017},
month = {Fri May 26 00:00:00 EDT 2017}
}
  • The effects of structural disorder introduced by proton and heavy-ion irradiation on the mixed-state Hall resistivity ([rho][sub [ital xy]]) of Tl[sub 2]Ba[sub 2]CaCu[sub 2]O[sub 8] films are reported. The [rho][sub [ital xy]] attains a peak negative value at a temperature [ital T]* where the vortex mobility is a rapidly varying function of temperature. At [ital T]* it also shows a universal inverse scaling with the normal-state resistivity of the material, which increases on irradiation. Our data suggest that a stronger downstream contribution to vortex velocity from the drift of the normal carriers in the core, dictates the sign of themore » Hall voltage as the overall carrier concentration in the materials is reduced by irradiation.« less
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