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Enhanced Thermoelectric Properties of Misfit Bi(2)Sr(2-x)Ca(x)Co(2)O(y): Isovalent Substitutions and Selective Phonon Scattering

Layered Bi-misfit cobaltates, such as Bi(2)Sr(2)Co(2)O(y), are the natural superlattice of an electrically insulating rocksalt (RS) type Bi(2)Sr(2)O(4) layer and electrically conducting CoO(2) layer, stacked along the crystallographic c-axis. RS and CoO(2) layers are related through charge compensat...

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Autores principales: Chatterjee, Arindom, Banik, Ananya, El Sachat, Alexandros, Caicedo Roque, José Manuel, Padilla-Pantoja, Jessica, Sotomayor Torres, Clivia M., Biswas, Kanishka, Santiso, José, Chavez-Angel, Emigdio
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2023
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9959144/
https://www.ncbi.nlm.nih.gov/pubmed/36837043
http://dx.doi.org/10.3390/ma16041413
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author Chatterjee, Arindom
Banik, Ananya
El Sachat, Alexandros
Caicedo Roque, José Manuel
Padilla-Pantoja, Jessica
Sotomayor Torres, Clivia M.
Biswas, Kanishka
Santiso, José
Chavez-Angel, Emigdio
author_facet Chatterjee, Arindom
Banik, Ananya
El Sachat, Alexandros
Caicedo Roque, José Manuel
Padilla-Pantoja, Jessica
Sotomayor Torres, Clivia M.
Biswas, Kanishka
Santiso, José
Chavez-Angel, Emigdio
author_sort Chatterjee, Arindom
collection PubMed
description Layered Bi-misfit cobaltates, such as Bi(2)Sr(2)Co(2)O(y), are the natural superlattice of an electrically insulating rocksalt (RS) type Bi(2)Sr(2)O(4) layer and electrically conducting CoO(2) layer, stacked along the crystallographic c-axis. RS and CoO(2) layers are related through charge compensation reactions (or charge transfer). Therefore, thermoelectric transport properties are affected when doping or substitution is carried out in the RS layer. In this work, we have shown improved thermoelectric properties of spark plasma sintered Bi(2)Sr(2-x)Ca(x)Co(2)O(y) alloys (x = 0, 0.3 and 0.5). The substitution of Ca atoms affects the thermal properties by introducing point-defect phonon scattering, while the electronic conductivity and thermopower remain unaltered.
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spelling pubmed-99591442023-02-26 Enhanced Thermoelectric Properties of Misfit Bi(2)Sr(2-x)Ca(x)Co(2)O(y): Isovalent Substitutions and Selective Phonon Scattering Chatterjee, Arindom Banik, Ananya El Sachat, Alexandros Caicedo Roque, José Manuel Padilla-Pantoja, Jessica Sotomayor Torres, Clivia M. Biswas, Kanishka Santiso, José Chavez-Angel, Emigdio Materials (Basel) Article Layered Bi-misfit cobaltates, such as Bi(2)Sr(2)Co(2)O(y), are the natural superlattice of an electrically insulating rocksalt (RS) type Bi(2)Sr(2)O(4) layer and electrically conducting CoO(2) layer, stacked along the crystallographic c-axis. RS and CoO(2) layers are related through charge compensation reactions (or charge transfer). Therefore, thermoelectric transport properties are affected when doping or substitution is carried out in the RS layer. In this work, we have shown improved thermoelectric properties of spark plasma sintered Bi(2)Sr(2-x)Ca(x)Co(2)O(y) alloys (x = 0, 0.3 and 0.5). The substitution of Ca atoms affects the thermal properties by introducing point-defect phonon scattering, while the electronic conductivity and thermopower remain unaltered. MDPI 2023-02-08 /pmc/articles/PMC9959144/ /pubmed/36837043 http://dx.doi.org/10.3390/ma16041413 Text en © 2023 by the authors. https://creativecommons.org/licenses/by/4.0/Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Chatterjee, Arindom
Banik, Ananya
El Sachat, Alexandros
Caicedo Roque, José Manuel
Padilla-Pantoja, Jessica
Sotomayor Torres, Clivia M.
Biswas, Kanishka
Santiso, José
Chavez-Angel, Emigdio
Enhanced Thermoelectric Properties of Misfit Bi(2)Sr(2-x)Ca(x)Co(2)O(y): Isovalent Substitutions and Selective Phonon Scattering
title Enhanced Thermoelectric Properties of Misfit Bi(2)Sr(2-x)Ca(x)Co(2)O(y): Isovalent Substitutions and Selective Phonon Scattering
title_full Enhanced Thermoelectric Properties of Misfit Bi(2)Sr(2-x)Ca(x)Co(2)O(y): Isovalent Substitutions and Selective Phonon Scattering
title_fullStr Enhanced Thermoelectric Properties of Misfit Bi(2)Sr(2-x)Ca(x)Co(2)O(y): Isovalent Substitutions and Selective Phonon Scattering
title_full_unstemmed Enhanced Thermoelectric Properties of Misfit Bi(2)Sr(2-x)Ca(x)Co(2)O(y): Isovalent Substitutions and Selective Phonon Scattering
title_short Enhanced Thermoelectric Properties of Misfit Bi(2)Sr(2-x)Ca(x)Co(2)O(y): Isovalent Substitutions and Selective Phonon Scattering
title_sort enhanced thermoelectric properties of misfit bi(2)sr(2-x)ca(x)co(2)o(y): isovalent substitutions and selective phonon scattering
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9959144/
https://www.ncbi.nlm.nih.gov/pubmed/36837043
http://dx.doi.org/10.3390/ma16041413
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