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PMMA or PVDF films blended with ß-diketonate tetrakis EuIII or TbIII complexes used as downshifting coatings of near-UV LEDs.
Beltrame, Ariane C F; Bispo-Jr, Airton G; Canisares, Felipe S M; Fernandes, Ricardo V; Laureto, Edson; Lima, Sergio A M; Pires, Ana M.
Afiliação
  • Beltrame ACF; Sao Paulo State University (Unesp), Institute of Biosciences, Humanities and Exact Sciences, Sao Jose do Rio Preto-SP, Brazil. ana.maria@unesp.br.
  • Bispo-Jr AG; Sao Paulo State University (Unesp), School of Technology and Sciences, Presidente Prudente-SP, Brazil.
  • Canisares FSM; Department of inorganic chemistry, Institute of Chemistry, University of Campinas (Unicamp), Campinas-SP, Brazil.
  • Fernandes RV; Sao Paulo State University (Unesp), Institute of Chemistry, Araraquara-SP, Brazil.
  • Laureto E; State University of Londrina (UEL), Londrina-PR, Brazil.
  • Lima SAM; State University of Londrina (UEL), Londrina-PR, Brazil.
  • Pires AM; Sao Paulo State University (Unesp), Institute of Biosciences, Humanities and Exact Sciences, Sao Jose do Rio Preto-SP, Brazil. ana.maria@unesp.br.
Soft Matter ; 19(22): 3992-4000, 2023 Jun 07.
Article em En | MEDLINE | ID: mdl-37096365
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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Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Idioma: En Revista: Soft Matter Ano de publicação: 2023 Tipo de documento: Article País de afiliação: Brasil País de publicação: Reino Unido
Texto completo
Adicionar na Minha BVS
Imprimir
XML
PubMed Links
Buscar no Google

Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Idioma: En Revista: Soft Matter Ano de publicação: 2023 Tipo de documento: Article País de afiliação: Brasil País de publicação: Reino Unido