PMMA or PVDF films blended with β-diketonate tetrakis EuIII or TbIII complexes used as downshifting coatings of near-UV LEDs
Autor(a) principal: | |
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Data de Publicação: | 2023 |
Outros Autores: | , , , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UNESP |
Texto Completo: | http://dx.doi.org/10.1039/d3sm00239j http://hdl.handle.net/11449/247260 |
Resumo: | Luminescent LnIII complexes incorporated in polymeric films exhibit narrow emission bands and absorption within the near-UV/blue spectral range, and enhanced phostability, which qualify them to be explored for solid-state lighting. Herein, (C26H56N)[Eu(dbm)4] and Na[Tb(acac)4], (C26H56N+ = didodecyldimethylammonium, dbm− =1,3-diphenyl-1,3-propanedionate, acac− = acetylacetonate), were dispersed in PMMA or PVDF films to protect them from degradation, and the obtained blends were applied as downshifting coatings on near-UV emitter LEDs. Upon such excitation, both EuIII and TbIII complexes emit red or green light with absolute emission quantum yields of 6.4 and 99%, respectively. The complex amount within films influences the photophysical parameters due to multiphotonic deactivation, and formation of agglomerates. For the PMMA-based LED prototypes, the LnIII emission is well-observed while for the PVDF ones, only a poor LnIII emission is detected due to their opacity. Therefore, the PMMA-based systems are better candidates to be used as luminescent coatings of near-UV LEDs for solid-state lighting. |
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spelling |
PMMA or PVDF films blended with β-diketonate tetrakis EuIII or TbIII complexes used as downshifting coatings of near-UV LEDsLuminescent LnIII complexes incorporated in polymeric films exhibit narrow emission bands and absorption within the near-UV/blue spectral range, and enhanced phostability, which qualify them to be explored for solid-state lighting. Herein, (C26H56N)[Eu(dbm)4] and Na[Tb(acac)4], (C26H56N+ = didodecyldimethylammonium, dbm− =1,3-diphenyl-1,3-propanedionate, acac− = acetylacetonate), were dispersed in PMMA or PVDF films to protect them from degradation, and the obtained blends were applied as downshifting coatings on near-UV emitter LEDs. Upon such excitation, both EuIII and TbIII complexes emit red or green light with absolute emission quantum yields of 6.4 and 99%, respectively. The complex amount within films influences the photophysical parameters due to multiphotonic deactivation, and formation of agglomerates. For the PMMA-based LED prototypes, the LnIII emission is well-observed while for the PVDF ones, only a poor LnIII emission is detected due to their opacity. Therefore, the PMMA-based systems are better candidates to be used as luminescent coatings of near-UV LEDs for solid-state lighting.Sao Paulo State University (Unesp) Institute of Biosciences Humanities and Exact Sciences, SPSao Paulo State University (Unesp) School of Technology and Sciences, SPSao Paulo State University (Unesp) Institute of Chemistry, SPDepartment of inorganic chemistry Institute of Chemistry University of Campinas (Unicamp), SPState University of Londrina (UEL), PRSao Paulo State University (Unesp) Institute of Biosciences Humanities and Exact Sciences, SPSao Paulo State University (Unesp) School of Technology and Sciences, SPSao Paulo State University (Unesp) Institute of Chemistry, SPUniversidade Estadual Paulista (UNESP)Universidade Estadual de Campinas (UNICAMP)Universidade Estadual de Londrina (UEL)Beltrame, Ariane C. F. [UNESP]Bispo-Jr, Airton G.Canisares, Felipe S. M. [UNESP]Fernandes, Ricardo V.Laureto, EdsonLima, Sergio A. M. [UNESP]Pires, Ana M. [UNESP]2023-07-29T13:11:08Z2023-07-29T13:11:08Z2023-01-01info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articlehttp://dx.doi.org/10.1039/d3sm00239jSoft Matter.1744-68481744-683Xhttp://hdl.handle.net/11449/24726010.1039/d3sm00239j2-s2.0-85153971208Scopusreponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPengSoft Matterinfo:eu-repo/semantics/openAccess2023-07-29T13:11:08Zoai:repositorio.unesp.br:11449/247260Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462024-08-05T18:49:32.835187Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false |
dc.title.none.fl_str_mv |
PMMA or PVDF films blended with β-diketonate tetrakis EuIII or TbIII complexes used as downshifting coatings of near-UV LEDs |
title |
PMMA or PVDF films blended with β-diketonate tetrakis EuIII or TbIII complexes used as downshifting coatings of near-UV LEDs |
spellingShingle |
PMMA or PVDF films blended with β-diketonate tetrakis EuIII or TbIII complexes used as downshifting coatings of near-UV LEDs Beltrame, Ariane C. F. [UNESP] |
title_short |
PMMA or PVDF films blended with β-diketonate tetrakis EuIII or TbIII complexes used as downshifting coatings of near-UV LEDs |
title_full |
PMMA or PVDF films blended with β-diketonate tetrakis EuIII or TbIII complexes used as downshifting coatings of near-UV LEDs |
title_fullStr |
PMMA or PVDF films blended with β-diketonate tetrakis EuIII or TbIII complexes used as downshifting coatings of near-UV LEDs |
title_full_unstemmed |
PMMA or PVDF films blended with β-diketonate tetrakis EuIII or TbIII complexes used as downshifting coatings of near-UV LEDs |
title_sort |
PMMA or PVDF films blended with β-diketonate tetrakis EuIII or TbIII complexes used as downshifting coatings of near-UV LEDs |
author |
Beltrame, Ariane C. F. [UNESP] |
author_facet |
Beltrame, Ariane C. F. [UNESP] Bispo-Jr, Airton G. Canisares, Felipe S. M. [UNESP] Fernandes, Ricardo V. Laureto, Edson Lima, Sergio A. M. [UNESP] Pires, Ana M. [UNESP] |
author_role |
author |
author2 |
Bispo-Jr, Airton G. Canisares, Felipe S. M. [UNESP] Fernandes, Ricardo V. Laureto, Edson Lima, Sergio A. M. [UNESP] Pires, Ana M. [UNESP] |
author2_role |
author author author author author author |
dc.contributor.none.fl_str_mv |
Universidade Estadual Paulista (UNESP) Universidade Estadual de Campinas (UNICAMP) Universidade Estadual de Londrina (UEL) |
dc.contributor.author.fl_str_mv |
Beltrame, Ariane C. F. [UNESP] Bispo-Jr, Airton G. Canisares, Felipe S. M. [UNESP] Fernandes, Ricardo V. Laureto, Edson Lima, Sergio A. M. [UNESP] Pires, Ana M. [UNESP] |
description |
Luminescent LnIII complexes incorporated in polymeric films exhibit narrow emission bands and absorption within the near-UV/blue spectral range, and enhanced phostability, which qualify them to be explored for solid-state lighting. Herein, (C26H56N)[Eu(dbm)4] and Na[Tb(acac)4], (C26H56N+ = didodecyldimethylammonium, dbm− =1,3-diphenyl-1,3-propanedionate, acac− = acetylacetonate), were dispersed in PMMA or PVDF films to protect them from degradation, and the obtained blends were applied as downshifting coatings on near-UV emitter LEDs. Upon such excitation, both EuIII and TbIII complexes emit red or green light with absolute emission quantum yields of 6.4 and 99%, respectively. The complex amount within films influences the photophysical parameters due to multiphotonic deactivation, and formation of agglomerates. For the PMMA-based LED prototypes, the LnIII emission is well-observed while for the PVDF ones, only a poor LnIII emission is detected due to their opacity. Therefore, the PMMA-based systems are better candidates to be used as luminescent coatings of near-UV LEDs for solid-state lighting. |
publishDate |
2023 |
dc.date.none.fl_str_mv |
2023-07-29T13:11:08Z 2023-07-29T13:11:08Z 2023-01-01 |
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/10.1039/d3sm00239j Soft Matter. 1744-6848 1744-683X http://hdl.handle.net/11449/247260 10.1039/d3sm00239j 2-s2.0-85153971208 |
url |
http://dx.doi.org/10.1039/d3sm00239j http://hdl.handle.net/11449/247260 |
identifier_str_mv |
Soft Matter. 1744-6848 1744-683X 10.1039/d3sm00239j 2-s2.0-85153971208 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
Soft Matter |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.source.none.fl_str_mv |
Scopus 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_ |
1808128985637322752 |