Investigação das propriedades ópticas de nanocristais de Perovskita – CsPbI3 crescidos em matriz vítrea, dopados com íons de Neodímio - Nd3+
Kaydedildi:
| Yazar: | |
|---|---|
| Yayın Tarihi: | 2023 |
| Materyal Türü: | Master thesis |
| Dil: | por |
| Kaynak: | Repositório Comum do Brasil - Deposita |
| Download full: | https://deposita.ibict.br/handle/deposita/728 |
Özet: | The main objective of this work is to synthesize and characterize the optical, structural and electronic properties of Perovskite - CsPbI3 nanocrystals grown in a glass matrix, doped with Nd3+ ions. The synthesis process of the material was based on the fusion of the reagents in an electric furnace, followed by sudden cooling, in order to control the nucleation and growth rate of the nanocrystals, in addition to being the mechanism for forming the amorphous phase of the matrix, the glass. The material was heat treated in an electric furnace for different times, keeping the temperature constant, in order to verify the influence of the size of the nanocrystals in relation to the quantum confinement of the system. The analysis of the optical properties of the nanocrystals was performed by UVVis-NIR Optical Absorption Spectroscopy, Photoluminescence Spectroscopy and Fluorescence Lifetime Spectroscopy as a function of temperature. The structural characterizations were performed by X-ray Diffraction, Transmission Electron Microscopy and Selected Area Electron Diffraction. As experimental results, the presence of energy transfer from CsPbI3 nanocrystals to Nd3+ ions embedded in glassy systems (SBNAPC: SiO2-B2O3–NaI–Al2O3–PbI2–Cs2CO3) was observed. The radiative and non-radiative energy transfer between the Perovskite nanocrystals and the levels of Nd3+ ions could be observed in the photoluminescence spectra, with the main characteristic being absorption in the ultraviolet region and emission in the visible region. The results obtained demonstrate the presence of nanocrystals with a predominant orthorhombic structure, with cubic structures being found in some regions. These nanocrystals have an average size of 7 nm, which indicates the presence of high quantum confinement of the system. It is believed that these results may inspire further investigation of similar systems to enable the development of possible devices or laser applications. In addition, the synthesis strategy in a glass matrix has proven to be effective in protecting nanocrystals from chemical attack in a hostile environment, ensuring long-term stability, when compared to the colloidal system, since these are easily oxidized or inactivated in the presence of oxygen, humidity or light irradiation. |
| _version_ | 1872168161834434560 |
|---|---|
| author | Ferreira, Davi Ladislau |
| author_browse | Ferreira, Davi Ladislau |
| author_facet | Ferreira, Davi Ladislau |
| author_role | author |
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| collection | Repositório Comum do Brasil - Deposita |
| contributor_str_mv | Silva, Ricardo Souza da Condeles, José Fernando Oliveira, João Batista de |
| dc.contributor.advisor1.fl_str_mv | Silva, Ricardo Souza da |
| dc.contributor.advisor1ID.fl_str_mv | https://orcid.org/0000-0002-0743-5352 |
| dc.contributor.advisor1Lattes.fl_str_mv | http://lattes.cnpq.br/7982979995135056 |
| dc.contributor.author.fl_str_mv | Ferreira, Davi Ladislau |
| dc.contributor.authorLattes.fl_str_mv | http://lattes.cnpq.br/9466433260828414 |
| dc.contributor.referee1.fl_str_mv | Condeles, José Fernando |
| dc.contributor.referee1Lattes.fl_str_mv | http://lattes.cnpq.br/3904831299794794 |
| dc.contributor.referee2.fl_str_mv | Oliveira, João Batista de |
| dc.contributor.referee2Lattes.fl_str_mv | http://lattes.cnpq.br/8351205882956552 |
| dc.date.accessioned.fl_str_mv | 2024-12-16T18:01:50Z |
| dc.date.issued.fl_str_mv | 2023 |
| dc.format.none.fl_str_mv | application/pdf application/pdf |
| dc.identifier.uri.fl_str_mv | https://deposita.ibict.br/handle/deposita/728 |
| dc.language.iso.fl_str_mv | por |
| dc.publisher.country.fl_str_mv | Brasil |
| dc.publisher.department.fl_str_mv | Universidade Federal do Triângulo Mineiro |
| dc.publisher.none.fl_str_mv | Universidade Federal do Triângulo Mineiro |
| dc.publisher.program.fl_str_mv | Programa de Pós-graduação em Ciências e Tecnologia dos Materiais |
| dc.rights.driver.fl_str_mv | info:eu-repo/semantics/openAccess |
| dc.source.none.fl_str_mv | reponame:Repositório Comum do Brasil - Deposita instname:Instituto Brasileiro de Informação em Ciência e Tecnologia (Ibict) instacron:IBICT |
| dc.subject.cnpq.fl_str_mv | Engenharias |
| dc.subject.por.fl_str_mv | Nanotecnologia Nanopartículas Perovskita Terras-raras Sistemas Vítreos |
| dc.title.por.fl_str_mv | Investigação das propriedades ópticas de nanocristais de Perovskita – CsPbI3 crescidos em matriz vítrea, dopados com íons de Neodímio - Nd3+ |
| dc.type.driver.fl_str_mv | info:eu-repo/semantics/masterThesis |
| dc.type.status.fl_str_mv | info:eu-repo/semantics/publishedVersion |
| description | The main objective of this work is to synthesize and characterize the optical, structural and electronic properties of Perovskite - CsPbI3 nanocrystals grown in a glass matrix, doped with Nd3+ ions. The synthesis process of the material was based on the fusion of the reagents in an electric furnace, followed by sudden cooling, in order to control the nucleation and growth rate of the nanocrystals, in addition to being the mechanism for forming the amorphous phase of the matrix, the glass. The material was heat treated in an electric furnace for different times, keeping the temperature constant, in order to verify the influence of the size of the nanocrystals in relation to the quantum confinement of the system. The analysis of the optical properties of the nanocrystals was performed by UVVis-NIR Optical Absorption Spectroscopy, Photoluminescence Spectroscopy and Fluorescence Lifetime Spectroscopy as a function of temperature. The structural characterizations were performed by X-ray Diffraction, Transmission Electron Microscopy and Selected Area Electron Diffraction. As experimental results, the presence of energy transfer from CsPbI3 nanocrystals to Nd3+ ions embedded in glassy systems (SBNAPC: SiO2-B2O3–NaI–Al2O3–PbI2–Cs2CO3) was observed. The radiative and non-radiative energy transfer between the Perovskite nanocrystals and the levels of Nd3+ ions could be observed in the photoluminescence spectra, with the main characteristic being absorption in the ultraviolet region and emission in the visible region. The results obtained demonstrate the presence of nanocrystals with a predominant orthorhombic structure, with cubic structures being found in some regions. These nanocrystals have an average size of 7 nm, which indicates the presence of high quantum confinement of the system. It is believed that these results may inspire further investigation of similar systems to enable the development of possible devices or laser applications. In addition, the synthesis strategy in a glass matrix has proven to be effective in protecting nanocrystals from chemical attack in a hostile environment, ensuring long-term stability, when compared to the colloidal system, since these are easily oxidized or inactivated in the presence of oxygen, humidity or light irradiation. |
| eu_rights_str_mv | openAccess |
| format | masterThesis |
| id | IBICT-1_58ffcb7d517ddc8351a55f14533fb8ad |
| instacron_str | IBICT |
| institution | IBICT |
| instname_str | Instituto Brasileiro de Informação em Ciência e Tecnologia (Ibict) |
| language | por |
| network_acronym_str | IBICT-1 |
| network_name_str | Repositório Comum do Brasil - Deposita |
| oai_identifier_str | oai:deposita.ibict.br:deposita/728 |
| publishDate | 2023 |
| publishDateSort | 2023 |
| publisher.none.fl_str_mv | Universidade Federal do Triângulo Mineiro |
| reponame_str | Repositório Comum do Brasil - Deposita |
| repository.mail.fl_str_mv | deposita@ibict.br |
| repository.name.fl_str_mv | Repositório Comum do Brasil - Deposita - Instituto Brasileiro de Informação em Ciência e Tecnologia (Ibict) |
| repository_id_str | 4658 |
| spelling | Silva, Ricardo Souza dahttps://orcid.org/0000-0002-0743-5352http://lattes.cnpq.br/7982979995135056Condeles, José Fernandohttp://lattes.cnpq.br/3904831299794794Oliveira, João Batista dehttp://lattes.cnpq.br/8351205882956552http://lattes.cnpq.br/9466433260828414Ferreira, Davi Ladislau2024-12-16T18:01:50Z2023https://deposita.ibict.br/handle/deposita/728The main objective of this work is to synthesize and characterize the optical, structural and electronic properties of Perovskite - CsPbI3 nanocrystals grown in a glass matrix, doped with Nd3+ ions. The synthesis process of the material was based on the fusion of the reagents in an electric furnace, followed by sudden cooling, in order to control the nucleation and growth rate of the nanocrystals, in addition to being the mechanism for forming the amorphous phase of the matrix, the glass. The material was heat treated in an electric furnace for different times, keeping the temperature constant, in order to verify the influence of the size of the nanocrystals in relation to the quantum confinement of the system. The analysis of the optical properties of the nanocrystals was performed by UVVis-NIR Optical Absorption Spectroscopy, Photoluminescence Spectroscopy and Fluorescence Lifetime Spectroscopy as a function of temperature. The structural characterizations were performed by X-ray Diffraction, Transmission Electron Microscopy and Selected Area Electron Diffraction. As experimental results, the presence of energy transfer from CsPbI3 nanocrystals to Nd3+ ions embedded in glassy systems (SBNAPC: SiO2-B2O3–NaI–Al2O3–PbI2–Cs2CO3) was observed. The radiative and non-radiative energy transfer between the Perovskite nanocrystals and the levels of Nd3+ ions could be observed in the photoluminescence spectra, with the main characteristic being absorption in the ultraviolet region and emission in the visible region. The results obtained demonstrate the presence of nanocrystals with a predominant orthorhombic structure, with cubic structures being found in some regions. These nanocrystals have an average size of 7 nm, which indicates the presence of high quantum confinement of the system. It is believed that these results may inspire further investigation of similar systems to enable the development of possible devices or laser applications. In addition, the synthesis strategy in a glass matrix has proven to be effective in protecting nanocrystals from chemical attack in a hostile environment, ensuring long-term stability, when compared to the colloidal system, since these are easily oxidized or inactivated in the presence of oxygen, humidity or light irradiation.O presente trabalho tem como principal objetivo sintetizar e caracterizar as propriedades ópticas, estruturais e eletrônicas dos nanocristais de Perovskita - CsPbI3 crescidos em matriz vítrea, dopados com íons de Nd3+ . O processo de síntese do material se deu com base na fusão dos reagentes em um forno elétrico, seguido de um resfriamento brusco, de modo a controlar a taxa de nucleação e crescimento dos nanocristais, além de ser o mecanismo formador da fase amorfa da matriz, o vidro. O material foi tratado termicamente em um forno elétrico em diferentes tempos, mantendo constante a temperatura, de modo a verificar a influência do tamanho dos nanocristais em relação ao confinamento quântico do sistema. A análise das propriedades ópticas dos nanocristais foi realizada por Espectroscopia de Absorção Óptica UVVis-NIR, Espectroscopia de Fotoluminescência e Espectroscopia de tempo de vida de Fluorescência em função da temperatura. Já as caracterizações estruturais foram realizadas por Difração de raios X, Microscopia Eletrônica de Transmissão e Difração de Elétrons de Área Selecionada. Como resultados, evidências experimentais foi observado a presença de transferência de energia a partir de nanocristais de CsPbI3 para íons de Nd3+ embebidos em sistemas vítreos (SBNAPC: SiO2-B2O3–NaI–Al2O3–PbI2–Cs2CO3). A transferência de energia radiativa e não radiativa entre os nanocristais de Perovskitas e os níveis dos íons Nd3+, puderam ser observados nos espectros de fotoluminescência, sendo que a principal característica presente foi uma absorção na região do ultravioleta e emissão na região do visível. Os resultados obtidos demonstram uma presença de nanocristais com estrutura predominante do tipo ortorrômbica, podendo ser encontrado em algumas regiões estruturas do tipo cúbica. Sendo esses nanocristais com tamanho médio de 7 nm, o que indica a presença de um elevado confinamento quântico do sistema. Acredita-se que estes resultados possam inspirar uma investigação mais aprofundada de sistemas similares para assim permitir alcançar possíveis dispositivos ou aplicações de lasers. Além disso, a estratégia de síntese em matriz vítrea demonstra-se eficaz para a proteção dos nanocristais ao ataque químico em ambiente hostil garantindo estabilidade a longo prazo, quando comparado ao sistema coloidal, uma vez que estes são facilmente oxidados ou inativados na presença de oxigênio, umidade ou irradiação de luz.CAPESSudeste-1application/pdfapplication/pdfporUniversidade Federal do Triângulo MineiroPrograma de Pós-graduação em Ciências e Tecnologia dos MateriaisBrasilUniversidade Federal do Triângulo MineiroNanotecnologiaNanopartículasPerovskitaTerras-rarasSistemas VítreosEngenhariasInvestigação das propriedades ópticas de nanocristais de Perovskita – CsPbI3 crescidos em matriz vítrea, dopados com íons de Neodímio - Nd3+info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/masterThesisinfo:eu-repo/semantics/openAccessreponame:Repositório Comum do Brasil - Depositainstname:Instituto Brasileiro de Informação em Ciência e Tecnologia (Ibict)instacron:IBICTTEXTInvestigação das propriedades ópticas de nanocristais de Perovskita – CsPbI3 crescidos em matriz vítrea, dopados com íons de Neodímio - Nd3+.pdf.txtWritten by FormatFilter org.dspace.app.mediafilter.TikaTextExtractionFilter on 2025-06-06T20:17:40Z (GMT).Extracted texttext/plain102734https://deposita.ibict.br/bitstreams/1ddde775-1ca6-4d8c-9a80-486f4a63b500/download7ce7b21b43023801c9a31a11ae0e06cbMD53falseAnonymousREADTHUMBNAILInvestigação das propriedades ópticas de nanocristais de Perovskita – CsPbI3 crescidos em matriz vítrea, dopados com íons de Neodímio - Nd3+.pdf.jpgWritten by FormatFilter org.dspace.app.mediafilter.PDFBoxThumbnail on 2025-06-06T20:17:40Z (GMT).Generated Thumbnailimage/jpeg2693https://deposita.ibict.br/bitstreams/f684a9ee-5aef-4f47-ab31-2d9e8670b98f/downloadc297e8bb3781d1b95c61bb623782103fMD54falseAnonymousREADLICENSElicense.txtWritten by org.dspace.content.LicenseUtilstext/plain; 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| spellingShingle | Investigação das propriedades ópticas de nanocristais de Perovskita – CsPbI3 crescidos em matriz vítrea, dopados com íons de Neodímio - Nd3+ Ferreira, Davi Ladislau Nanotecnologia Nanopartículas Perovskita Terras-raras Sistemas Vítreos Engenharias |
| status_str | publishedVersion |
| title | Investigação das propriedades ópticas de nanocristais de Perovskita – CsPbI3 crescidos em matriz vítrea, dopados com íons de Neodímio - Nd3+ |
| title_full | Investigação das propriedades ópticas de nanocristais de Perovskita – CsPbI3 crescidos em matriz vítrea, dopados com íons de Neodímio - Nd3+ |
| title_fullStr | Investigação das propriedades ópticas de nanocristais de Perovskita – CsPbI3 crescidos em matriz vítrea, dopados com íons de Neodímio - Nd3+ |
| title_full_unstemmed | Investigação das propriedades ópticas de nanocristais de Perovskita – CsPbI3 crescidos em matriz vítrea, dopados com íons de Neodímio - Nd3+ |
| title_short | Investigação das propriedades ópticas de nanocristais de Perovskita – CsPbI3 crescidos em matriz vítrea, dopados com íons de Neodímio - Nd3+ |
| title_sort | Investigação das propriedades ópticas de nanocristais de Perovskita – CsPbI3 crescidos em matriz vítrea, dopados com íons de Neodímio - Nd3+ |
| topic | Nanotecnologia Nanopartículas Perovskita Terras-raras Sistemas Vítreos Engenharias |
| url | https://deposita.ibict.br/handle/deposita/728 |