Structural Characterization and Thermoelectric Properties of Br-Doped AgSnm[Sb0.8Bi0.2]Te2+m Systems

Herein, we report the synthesis, structural and microstructural characterization, and thermoelectric properties of AgSnm[Sb0.8Bi0.2]Te2+m and Br-doped telluride systems. These compounds were prepared by solid-state reaction at high temperature. Powder X-ray diffraction data reveal that these samples...

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Authors: Delgado, Daniela, Moris, Silvana, Valencia Gálvez, Paulina, López García, María Luisa, Álvarez Serrano, Inmaculada, Blake, Graeme R., Galdámez, Antonio
Format: article
Publication Date:2023
Country:España
Institution:Universidad Complutense de Madrid (UCM)
Repository:Docta Complutense
Language:English
OAI Identifier:oai:docta.ucm.es:20.500.14352/103523
Online Access:https://hdl.handle.net/20.500.14352/103523
Access Level:Open access
Keyword:546
Tellurides
Seebeck coefficient
Thermal conductivity
Lead-free thermoelectric materials
Performance
SnTe
Thermopower
Power
Química inorgánica (Química)
2303 Química Inorgánica
id ES_fe2a17e76bd5fc0fe4e5c3d5b699dada
oai_identifier_str oai:docta.ucm.es:20.500.14352/103523
network_acronym_str ES
network_name_str España
repository_id_str
spelling Structural Characterization and Thermoelectric Properties of Br-Doped AgSnm[Sb0.8Bi0.2]Te2+m SystemsDelgado, DanielaMoris, SilvanaValencia Gálvez, PaulinaLópez García, María LuisaÁlvarez Serrano, InmaculadaBlake, Graeme R.Galdámez, Antonio546TelluridesSeebeck coefficientThermal conductivityLead-free thermoelectric materialsPerformanceSnTeThermopowerPowerQuímica inorgánica (Química)2303 Química InorgánicaHerein, we report the synthesis, structural and microstructural characterization, and thermoelectric properties of AgSnm[Sb0.8Bi0.2]Te2+m and Br-doped telluride systems. These compounds were prepared by solid-state reaction at high temperature. Powder X-ray diffraction data reveal that these samples exhibit crystal structures related to the NaCl-type lattice. The microstructures and morphologies are investigated by scanning electron microscopy, energy-dispersive X-ray spectroscopy (EDS), and high-resolution transmission electron microscopy (HRTEM). Positive values of the Seebeck coefficient (S) indicate that the transport properties are dominated by holes. The S of undoped AgSnm[Sb0.8Bi0.2]Te2+m ranges from +40 to 57 mu V.K-1. Br-doped samples with m = 2 show S values of +74 mu V.K-1 at RT, and the Seebeck coefficient increases almost linearly with increasing temperature. The total thermal conductivity (kappa(tot)) monotonically increases with increasing temperature (10-300 K). The ktot values of undoped AgSnm[Sb0.8Bi0.2]Te2+m are similar to 1.8 W m(-1) K-1 (m = 4) and similar to 1.0 W m(-1) K-1 (m = 2) at 300 K. The electrical conductivity (sigma) decreases almost linearly with increasing temperature, indicating metal-like behavior. The ZT value increases as a function of temperature. A maximum ZT value of similar to 0.07 is achieved at room temperature for the Br-doped phase with m = 4.MDPIUniversidad Complutense de Madrid20232023-01-0120232023-01-01journal articlehttp://purl.org/coar/resource_type/c_6501VoRhttp://purl.org/coar/version/c_970fb48d4fbd8a85info:eu-repo/semantics/articleapplication/pdfhttps://hdl.handle.net/20.500.14352/103523reponame:Docta Complutenseinstname:Universidad Complutense de Madrid (UCM)Inglésengopen accesshttp://purl.org/coar/access_right/c_abf2Attribution 4.0 Internationalhttp://creativecommons.org/licenses/by/4.0/info:eu-repo/semantics/openAccessoai:docta.ucm.es:20.500.14352/1035232026-06-02T12:44:21Z
dc.title.none.fl_str_mv Structural Characterization and Thermoelectric Properties of Br-Doped AgSnm[Sb0.8Bi0.2]Te2+m Systems
title Structural Characterization and Thermoelectric Properties of Br-Doped AgSnm[Sb0.8Bi0.2]Te2+m Systems
spellingShingle Structural Characterization and Thermoelectric Properties of Br-Doped AgSnm[Sb0.8Bi0.2]Te2+m Systems
Delgado, Daniela
546
Tellurides
Seebeck coefficient
Thermal conductivity
Lead-free thermoelectric materials
Performance
SnTe
Thermopower
Power
Química inorgánica (Química)
2303 Química Inorgánica
title_short Structural Characterization and Thermoelectric Properties of Br-Doped AgSnm[Sb0.8Bi0.2]Te2+m Systems
title_full Structural Characterization and Thermoelectric Properties of Br-Doped AgSnm[Sb0.8Bi0.2]Te2+m Systems
title_fullStr Structural Characterization and Thermoelectric Properties of Br-Doped AgSnm[Sb0.8Bi0.2]Te2+m Systems
title_full_unstemmed Structural Characterization and Thermoelectric Properties of Br-Doped AgSnm[Sb0.8Bi0.2]Te2+m Systems
title_sort Structural Characterization and Thermoelectric Properties of Br-Doped AgSnm[Sb0.8Bi0.2]Te2+m Systems
dc.creator.none.fl_str_mv Delgado, Daniela
Moris, Silvana
Valencia Gálvez, Paulina
López García, María Luisa
Álvarez Serrano, Inmaculada
Blake, Graeme R.
Galdámez, Antonio
author Delgado, Daniela
author_facet Delgado, Daniela
Moris, Silvana
Valencia Gálvez, Paulina
López García, María Luisa
Álvarez Serrano, Inmaculada
Blake, Graeme R.
Galdámez, Antonio
author_role author
author2 Moris, Silvana
Valencia Gálvez, Paulina
López García, María Luisa
Álvarez Serrano, Inmaculada
Blake, Graeme R.
Galdámez, Antonio
author2_role author
author
author
author
author
author
dc.contributor.none.fl_str_mv Universidad Complutense de Madrid
dc.subject.none.fl_str_mv 546
Tellurides
Seebeck coefficient
Thermal conductivity
Lead-free thermoelectric materials
Performance
SnTe
Thermopower
Power
Química inorgánica (Química)
2303 Química Inorgánica
topic 546
Tellurides
Seebeck coefficient
Thermal conductivity
Lead-free thermoelectric materials
Performance
SnTe
Thermopower
Power
Química inorgánica (Química)
2303 Química Inorgánica
description Herein, we report the synthesis, structural and microstructural characterization, and thermoelectric properties of AgSnm[Sb0.8Bi0.2]Te2+m and Br-doped telluride systems. These compounds were prepared by solid-state reaction at high temperature. Powder X-ray diffraction data reveal that these samples exhibit crystal structures related to the NaCl-type lattice. The microstructures and morphologies are investigated by scanning electron microscopy, energy-dispersive X-ray spectroscopy (EDS), and high-resolution transmission electron microscopy (HRTEM). Positive values of the Seebeck coefficient (S) indicate that the transport properties are dominated by holes. The S of undoped AgSnm[Sb0.8Bi0.2]Te2+m ranges from +40 to 57 mu V.K-1. Br-doped samples with m = 2 show S values of +74 mu V.K-1 at RT, and the Seebeck coefficient increases almost linearly with increasing temperature. The total thermal conductivity (kappa(tot)) monotonically increases with increasing temperature (10-300 K). The ktot values of undoped AgSnm[Sb0.8Bi0.2]Te2+m are similar to 1.8 W m(-1) K-1 (m = 4) and similar to 1.0 W m(-1) K-1 (m = 2) at 300 K. The electrical conductivity (sigma) decreases almost linearly with increasing temperature, indicating metal-like behavior. The ZT value increases as a function of temperature. A maximum ZT value of similar to 0.07 is achieved at room temperature for the Br-doped phase with m = 4.
publishDate 2023
dc.date.none.fl_str_mv 2023
2023-01-01
2023
2023-01-01
dc.type.none.fl_str_mv journal article
http://purl.org/coar/resource_type/c_6501
VoR
http://purl.org/coar/version/c_970fb48d4fbd8a85
dc.type.openaire.fl_str_mv info:eu-repo/semantics/article
format article
dc.identifier.none.fl_str_mv https://hdl.handle.net/20.500.14352/103523
url https://hdl.handle.net/20.500.14352/103523
dc.language.none.fl_str_mv Inglés
eng
language_invalid_str_mv Inglés
language eng
dc.rights.none.fl_str_mv open access
http://purl.org/coar/access_right/c_abf2
Attribution 4.0 International
http://creativecommons.org/licenses/by/4.0/
dc.rights.openaire.fl_str_mv info:eu-repo/semantics/openAccess
rights_invalid_str_mv open access
http://purl.org/coar/access_right/c_abf2
Attribution 4.0 International
http://creativecommons.org/licenses/by/4.0/
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv MDPI
publisher.none.fl_str_mv MDPI
dc.source.none.fl_str_mv reponame:Docta Complutense
instname:Universidad Complutense de Madrid (UCM)
instname_str Universidad Complutense de Madrid (UCM)
reponame_str Docta Complutense
collection Docta Complutense
repository.name.fl_str_mv
repository.mail.fl_str_mv
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score 15.300719

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