Low-temperature structural phase transitions of the lead-free hybrid vacancy-ordered perovskite (DMA)2SnBr6

Detalhes bibliográficos
Ano de defesa: 2023
Autor(a) principal: Furtado, Otávio Peixoto
Orientador(a): Ayala, Alejandro Pedro
Banca de defesa: Não Informado pela instituição
Tipo de documento: Dissertação
Tipo de acesso: Acesso aberto
Idioma: eng
Instituição de defesa: Não Informado pela instituição
Programa de Pós-Graduação: Não Informado pela instituição
Departamento: Não Informado pela instituição
País: Não Informado pela instituição
Área do conhecimento CNPq:
CNPQ::CIENCIAS EXATAS E DA TERRA::FISICA::FISICA DA MATERIA CONDENSADA
Link de acesso: http://repositorio.ufc.br/handle/riufc/74878
Resumo: In this master’s thesis, a combination of experimental and theoretical techniques are employed to investigate the hybrid vacancy-ordered perovskite material [(CH3)2NH2]2SnBr6 (or in its abbreviated form: (DMA)2SnBr6) and its structural changes that happen at low temperatures. Through the use of experimental techniques such as Single Crystal X-Ray Diffraction (SCXRD), Differential Scanning Calorimetry (DSC) and Raman spectroscopy, it was possible to identify that this compound undergoes three structural phase transitions near the temperatures of 200 K, 100 K and 50 K. The first two transitions were found in our SCXRD measurements, with the first one being a displacive orthorhombic-monoclinic phase transition, while the second one was found to be an order-disorder monoclinic-triclinic phase transition. The last transition was only observed experimentaly through our Raman spectroscopy measurements and was confirmed as a triclinic-triclinic phase transition based on our theoretical Γ-point phonon calculation.
id UFC-7_c11d684bdb7d36e59f3e2cd0e3eff915
oai_identifier_str oai:repositorio.ufc.br:riufc/74878
network_acronym_str UFC-7
network_name_str Repositório Institucional da Universidade Federal do Ceará (UFC)
repository_id_str
spelling Furtado, Otávio PeixotoAyala, Alejandro Pedro2023-11-03T19:53:16Z2023-11-03T19:53:16Z2023FURTADO, O. P. Low-temperature structural phase transitions of the lead-free hybrid vacancy-ordered perovskite (DMA)2SnBr6. 2023. 59 f. Dissertação (Mestrado em Física) – Centro de Ciências, Universidade Federal do Ceará, Fortaleza, 2023.http://repositorio.ufc.br/handle/riufc/74878In this master’s thesis, a combination of experimental and theoretical techniques are employed to investigate the hybrid vacancy-ordered perovskite material [(CH3)2NH2]2SnBr6 (or in its abbreviated form: (DMA)2SnBr6) and its structural changes that happen at low temperatures. Through the use of experimental techniques such as Single Crystal X-Ray Diffraction (SCXRD), Differential Scanning Calorimetry (DSC) and Raman spectroscopy, it was possible to identify that this compound undergoes three structural phase transitions near the temperatures of 200 K, 100 K and 50 K. The first two transitions were found in our SCXRD measurements, with the first one being a displacive orthorhombic-monoclinic phase transition, while the second one was found to be an order-disorder monoclinic-triclinic phase transition. The last transition was only observed experimentaly through our Raman spectroscopy measurements and was confirmed as a triclinic-triclinic phase transition based on our theoretical Γ-point phonon calculation.Nesta dissertação de mestrado, uma combinação de técnicas experimentais e teóricas são utilizadas para investigar as propriedades da perovskita híbrida, livre de chumbo e ordenada por vacância [(CH3)2NH2]2SnBr6 (ou na forma abreviada: (DMA)2SnBr6) e suas mudanças estruturais que ocorrem em baixas temperaturas. A partir do uso de técnicas experimentais como Difração de Raios-x de Monocristal (SCXRD), Calorimetria de Varredura Diferencial (DSC) e espectroscopia Raman, foi possivel identificar as transições de fase proximas às temperaturas de 200 K, 100 K e 50 K. As duas primeiras transições foram identificadas em nossas medidas de SCXRD, onde a primeira foi identificada como uma transição do tipo displaciva ortorrômbico-monoclínico, enquanto a segunda foi descoberta como uma transição ordem-desordem monoclínico-triclínico. A última transição foi observada experimentalmente apenas através das nossas medidas de espectroscopia Raman e foi confimada como uma transição triclínica-triclínica a partir dos nossos cálculos teóricos de fônons no ponto Γ.Low-temperature structural phase transitions of the lead-free hybrid vacancy-ordered perovskite (DMA)2SnBr6info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/masterThesisPerovskitaTransformações de fase (Física Estatística)Difração de raios-xEspectroscopia RamanCNPQ::CIENCIAS EXATAS E DA TERRA::FISICA::FISICA DA MATERIA CONDENSADAinfo:eu-repo/semantics/openAccessengreponame:Repositório Institucional da Universidade Federal do Ceará (UFC)instname:Universidade Federal do Ceará (UFC)instacron:UFC2023ORIGINAL2023_dis_opfurtado.pdf2023_dis_opfurtado.pdfapplication/pdf3633552http://repositorio.ufc.br/bitstream/riufc/74878/5/2023_dis_opfurtado.pdf6eb9b60b3f3e574572f569d63021fe34MD55LICENSElicense.txtlicense.txttext/plain; charset=utf-81748http://repositorio.ufc.br/bitstream/riufc/74878/4/license.txt8a4605be74aa9ea9d79846c1fba20a33MD54riufc/748782023-11-03 16:55:58.379oai:repositorio.ufc.br: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Repositório InstitucionalPUBhttp://www.repositorio.ufc.br/ri-oai/requestbu@ufc.br || repositorio@ufc.bropendoar:2023-11-03T19:55:58Repositório Institucional da Universidade Federal do Ceará (UFC) - Universidade Federal do Ceará (UFC)false
dc.title.pt_BR.fl_str_mv Low-temperature structural phase transitions of the lead-free hybrid vacancy-ordered perovskite (DMA)2SnBr6
title Low-temperature structural phase transitions of the lead-free hybrid vacancy-ordered perovskite (DMA)2SnBr6
spellingShingle Low-temperature structural phase transitions of the lead-free hybrid vacancy-ordered perovskite (DMA)2SnBr6
Furtado, Otávio Peixoto
CNPQ::CIENCIAS EXATAS E DA TERRA::FISICA::FISICA DA MATERIA CONDENSADA
Perovskita
Transformações de fase (Física Estatística)
Difração de raios-x
Espectroscopia Raman
title_short Low-temperature structural phase transitions of the lead-free hybrid vacancy-ordered perovskite (DMA)2SnBr6
title_full Low-temperature structural phase transitions of the lead-free hybrid vacancy-ordered perovskite (DMA)2SnBr6
title_fullStr Low-temperature structural phase transitions of the lead-free hybrid vacancy-ordered perovskite (DMA)2SnBr6
title_full_unstemmed Low-temperature structural phase transitions of the lead-free hybrid vacancy-ordered perovskite (DMA)2SnBr6
title_sort Low-temperature structural phase transitions of the lead-free hybrid vacancy-ordered perovskite (DMA)2SnBr6
author Furtado, Otávio Peixoto
author_facet Furtado, Otávio Peixoto
author_role author
dc.contributor.author.fl_str_mv Furtado, Otávio Peixoto
dc.contributor.advisor1.fl_str_mv Ayala, Alejandro Pedro
contributor_str_mv Ayala, Alejandro Pedro
dc.subject.cnpq.fl_str_mv CNPQ::CIENCIAS EXATAS E DA TERRA::FISICA::FISICA DA MATERIA CONDENSADA
topic CNPQ::CIENCIAS EXATAS E DA TERRA::FISICA::FISICA DA MATERIA CONDENSADA
Perovskita
Transformações de fase (Física Estatística)
Difração de raios-x
Espectroscopia Raman
dc.subject.ptbr.pt_BR.fl_str_mv Perovskita
Transformações de fase (Física Estatística)
Difração de raios-x
Espectroscopia Raman
description In this master’s thesis, a combination of experimental and theoretical techniques are employed to investigate the hybrid vacancy-ordered perovskite material [(CH3)2NH2]2SnBr6 (or in its abbreviated form: (DMA)2SnBr6) and its structural changes that happen at low temperatures. Through the use of experimental techniques such as Single Crystal X-Ray Diffraction (SCXRD), Differential Scanning Calorimetry (DSC) and Raman spectroscopy, it was possible to identify that this compound undergoes three structural phase transitions near the temperatures of 200 K, 100 K and 50 K. The first two transitions were found in our SCXRD measurements, with the first one being a displacive orthorhombic-monoclinic phase transition, while the second one was found to be an order-disorder monoclinic-triclinic phase transition. The last transition was only observed experimentaly through our Raman spectroscopy measurements and was confirmed as a triclinic-triclinic phase transition based on our theoretical Γ-point phonon calculation.
publishDate 2023
dc.date.accessioned.fl_str_mv 2023-11-03T19:53:16Z
dc.date.available.fl_str_mv 2023-11-03T19:53:16Z
dc.date.issued.fl_str_mv 2023
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
dc.type.driver.fl_str_mv info:eu-repo/semantics/masterThesis
format masterThesis
status_str publishedVersion
dc.identifier.citation.fl_str_mv FURTADO, O. P. Low-temperature structural phase transitions of the lead-free hybrid vacancy-ordered perovskite (DMA)2SnBr6. 2023. 59 f. Dissertação (Mestrado em Física) – Centro de Ciências, Universidade Federal do Ceará, Fortaleza, 2023.
dc.identifier.uri.fl_str_mv http://repositorio.ufc.br/handle/riufc/74878
identifier_str_mv FURTADO, O. P. Low-temperature structural phase transitions of the lead-free hybrid vacancy-ordered perovskite (DMA)2SnBr6. 2023. 59 f. Dissertação (Mestrado em Física) – Centro de Ciências, Universidade Federal do Ceará, Fortaleza, 2023.
url http://repositorio.ufc.br/handle/riufc/74878
dc.language.iso.fl_str_mv eng
language eng
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.source.none.fl_str_mv reponame:Repositório Institucional da Universidade Federal do Ceará (UFC)
instname:Universidade Federal do Ceará (UFC)
instacron:UFC
instname_str Universidade Federal do Ceará (UFC)
instacron_str UFC
institution UFC
reponame_str Repositório Institucional da Universidade Federal do Ceará (UFC)
collection Repositório Institucional da Universidade Federal do Ceará (UFC)
bitstream.url.fl_str_mv http://repositorio.ufc.br/bitstream/riufc/74878/5/2023_dis_opfurtado.pdf
http://repositorio.ufc.br/bitstream/riufc/74878/4/license.txt
bitstream.checksum.fl_str_mv 6eb9b60b3f3e574572f569d63021fe34
8a4605be74aa9ea9d79846c1fba20a33
bitstream.checksumAlgorithm.fl_str_mv MD5
MD5
repository.name.fl_str_mv Repositório Institucional da Universidade Federal do Ceará (UFC) - Universidade Federal do Ceará (UFC)
repository.mail.fl_str_mv bu@ufc.br || repositorio@ufc.br
_version_ 1847793025848180736

Registros relacionados