An unusual frequency dispersion of the dielectric permittivity maxima at temperatures around the tetragonal-cubic phase transition of methylammonium lead iodide
Autor(a) principal: | |
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Data de Publicação: | 2020 |
Outros Autores: | , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UNESP |
Texto Completo: | http://dx.doi.org/10.1063/5.0012428 http://hdl.handle.net/11449/197032 |
Resumo: | We report studies on the unusual frequency dispersion of the dielectric permittivity maxima of methylammonium lead iodide pellets at temperatures around the tetragonal-cubic phase transition. The origin of this observed permittivity response was studied in terms of grains and grain boundaries' contributions in impedance, electric modulus, dielectric permittivity, and electrical conductivity. From theoretical fits of impedance and electric modulus measurements at different temperatures over a frequency range of 10(3)-10Hz, the reconstructed contributions of the grain boundary and grain permittivities show peaks around 339K and 384K, respectively. The origin of the grain boundary permittivity peak is discussed in terms of heterogenic ionic conduction associated with I- and MA(+) ions in MAPbI(3), while the peak in grain permittivity at high temperature is in terms of ionization of intrinsic carriers. The high value of the grain dielectric permittivity ( epsilon g = 1193 ), compared to the reconstructed grain boundary permittivity ( epsilon g b = 53 ), suggests a possible relaxor ferroelectric behavior with a diffuse phase transition for methylammonium lead iodide. The difficulties in confirming the ferroelectric nature of this halide perovskite based on impedance and electrical module data are also discussed. |
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An unusual frequency dispersion of the dielectric permittivity maxima at temperatures around the tetragonal-cubic phase transition of methylammonium lead iodideWe report studies on the unusual frequency dispersion of the dielectric permittivity maxima of methylammonium lead iodide pellets at temperatures around the tetragonal-cubic phase transition. The origin of this observed permittivity response was studied in terms of grains and grain boundaries' contributions in impedance, electric modulus, dielectric permittivity, and electrical conductivity. From theoretical fits of impedance and electric modulus measurements at different temperatures over a frequency range of 10(3)-10Hz, the reconstructed contributions of the grain boundary and grain permittivities show peaks around 339K and 384K, respectively. The origin of the grain boundary permittivity peak is discussed in terms of heterogenic ionic conduction associated with I- and MA(+) ions in MAPbI(3), while the peak in grain permittivity at high temperature is in terms of ionization of intrinsic carriers. The high value of the grain dielectric permittivity ( epsilon g = 1193 ), compared to the reconstructed grain boundary permittivity ( epsilon g b = 53 ), suggests a possible relaxor ferroelectric behavior with a diffuse phase transition for methylammonium lead iodide. The difficulties in confirming the ferroelectric nature of this halide perovskite based on impedance and electrical module data are also discussed.Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)Sao Paulo State Univ, Dept Chem & Phys, BR-15385000 Ilha Solteira, BrazilFed Inst Educ Sci & Technol Sao Paulo, BR-15503110 Votuporanga, BrazilSao Paulo State Univ, Dept Chem & Phys, BR-15385000 Ilha Solteira, BrazilFAPESP: 2019/24140-2FAPESP: 2017/13769-1CNPq: 304604/2015-1CAPES: 88881.310513/2018-01CNPq: 134651/2018-9Amer Inst PhysicsUniversidade Estadual Paulista (Unesp)Fed Inst Educ Sci & Technol Sao PauloMinussi, F. B. [UNESP]Reis, S. P. [UNESP]Araujo, E. B. [UNESP]2020-12-10T20:04:01Z2020-12-10T20:04:01Z2020-06-28info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/article11http://dx.doi.org/10.1063/5.0012428Journal Of Applied Physics. Melville: Amer Inst Physics, v. 127, n. 24, 11 p., 2020.0021-8979http://hdl.handle.net/11449/19703210.1063/5.0012428WOS:000545780300001Web of Sciencereponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPengJournal Of Applied Physicsinfo:eu-repo/semantics/openAccess2024-07-10T14:07:57Zoai:repositorio.unesp.br:11449/197032Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462024-08-05T20:58:08.953640Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false |
dc.title.none.fl_str_mv |
An unusual frequency dispersion of the dielectric permittivity maxima at temperatures around the tetragonal-cubic phase transition of methylammonium lead iodide |
title |
An unusual frequency dispersion of the dielectric permittivity maxima at temperatures around the tetragonal-cubic phase transition of methylammonium lead iodide |
spellingShingle |
An unusual frequency dispersion of the dielectric permittivity maxima at temperatures around the tetragonal-cubic phase transition of methylammonium lead iodide Minussi, F. B. [UNESP] |
title_short |
An unusual frequency dispersion of the dielectric permittivity maxima at temperatures around the tetragonal-cubic phase transition of methylammonium lead iodide |
title_full |
An unusual frequency dispersion of the dielectric permittivity maxima at temperatures around the tetragonal-cubic phase transition of methylammonium lead iodide |
title_fullStr |
An unusual frequency dispersion of the dielectric permittivity maxima at temperatures around the tetragonal-cubic phase transition of methylammonium lead iodide |
title_full_unstemmed |
An unusual frequency dispersion of the dielectric permittivity maxima at temperatures around the tetragonal-cubic phase transition of methylammonium lead iodide |
title_sort |
An unusual frequency dispersion of the dielectric permittivity maxima at temperatures around the tetragonal-cubic phase transition of methylammonium lead iodide |
author |
Minussi, F. B. [UNESP] |
author_facet |
Minussi, F. B. [UNESP] Reis, S. P. [UNESP] Araujo, E. B. [UNESP] |
author_role |
author |
author2 |
Reis, S. P. [UNESP] Araujo, E. B. [UNESP] |
author2_role |
author author |
dc.contributor.none.fl_str_mv |
Universidade Estadual Paulista (Unesp) Fed Inst Educ Sci & Technol Sao Paulo |
dc.contributor.author.fl_str_mv |
Minussi, F. B. [UNESP] Reis, S. P. [UNESP] Araujo, E. B. [UNESP] |
description |
We report studies on the unusual frequency dispersion of the dielectric permittivity maxima of methylammonium lead iodide pellets at temperatures around the tetragonal-cubic phase transition. The origin of this observed permittivity response was studied in terms of grains and grain boundaries' contributions in impedance, electric modulus, dielectric permittivity, and electrical conductivity. From theoretical fits of impedance and electric modulus measurements at different temperatures over a frequency range of 10(3)-10Hz, the reconstructed contributions of the grain boundary and grain permittivities show peaks around 339K and 384K, respectively. The origin of the grain boundary permittivity peak is discussed in terms of heterogenic ionic conduction associated with I- and MA(+) ions in MAPbI(3), while the peak in grain permittivity at high temperature is in terms of ionization of intrinsic carriers. The high value of the grain dielectric permittivity ( epsilon g = 1193 ), compared to the reconstructed grain boundary permittivity ( epsilon g b = 53 ), suggests a possible relaxor ferroelectric behavior with a diffuse phase transition for methylammonium lead iodide. The difficulties in confirming the ferroelectric nature of this halide perovskite based on impedance and electrical module data are also discussed. |
publishDate |
2020 |
dc.date.none.fl_str_mv |
2020-12-10T20:04:01Z 2020-12-10T20:04:01Z 2020-06-28 |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://dx.doi.org/10.1063/5.0012428 Journal Of Applied Physics. Melville: Amer Inst Physics, v. 127, n. 24, 11 p., 2020. 0021-8979 http://hdl.handle.net/11449/197032 10.1063/5.0012428 WOS:000545780300001 |
url |
http://dx.doi.org/10.1063/5.0012428 http://hdl.handle.net/11449/197032 |
identifier_str_mv |
Journal Of Applied Physics. Melville: Amer Inst Physics, v. 127, n. 24, 11 p., 2020. 0021-8979 10.1063/5.0012428 WOS:000545780300001 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
Journal Of Applied Physics |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
11 |
dc.publisher.none.fl_str_mv |
Amer Inst Physics |
publisher.none.fl_str_mv |
Amer Inst Physics |
dc.source.none.fl_str_mv |
Web of Science reponame:Repositório Institucional da UNESP instname:Universidade Estadual Paulista (UNESP) instacron:UNESP |
instname_str |
Universidade Estadual Paulista (UNESP) |
instacron_str |
UNESP |
institution |
UNESP |
reponame_str |
Repositório Institucional da UNESP |
collection |
Repositório Institucional da UNESP |
repository.name.fl_str_mv |
Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP) |
repository.mail.fl_str_mv |
|
_version_ |
1808129269726969856 |