Co-doped Ce3+, Cr3+ and Pr3+ yttrium–aluminium–gallium garnet powders of various sizes were obtained by co-precipitation method. The microstructure and morphology were investigated by XRPD, TEM and gas porosimetry. The luminescence properties were studied by excitation and emission spectra, quantum yield and decay times. Thermoluminescence measurements were performed to evaluate the activation energy, traps redistribution and frequency factor. Limitation in the energy transfer between dopant ions in the small particles, traps depth and surface defects were considered and investigated as responsible for the quenching of persistent luminescence. The phosphors annealed at 1100 °C show the optimal persistent luminescence and nano-particle size.

Particle size-related limitations of persistent phosphors based on the doped Y3Al2Ga3O12 system

Mortalò, Cecilia;Armetta, Francesco;Saladino, Maria Luisa;
2021

Abstract

Co-doped Ce3+, Cr3+ and Pr3+ yttrium–aluminium–gallium garnet powders of various sizes were obtained by co-precipitation method. The microstructure and morphology were investigated by XRPD, TEM and gas porosimetry. The luminescence properties were studied by excitation and emission spectra, quantum yield and decay times. Thermoluminescence measurements were performed to evaluate the activation energy, traps redistribution and frequency factor. Limitation in the energy transfer between dopant ions in the small particles, traps depth and surface defects were considered and investigated as responsible for the quenching of persistent luminescence. The phosphors annealed at 1100 °C show the optimal persistent luminescence and nano-particle size.
2021
Istituto di Chimica della Materia Condensata e di Tecnologie per l'Energia - ICMATE
Istituto per i Processi Chimico-Fisici - IPCF
Nanophosphors
YAGG
Co-doping
Persistent luminescence (PersL)
Energy transfer (ET)
Microstructure
Morphology
File in questo prodotto:
File Dimensione Formato  
26_Scientific Reports 11 (2021) 141.pdf

accesso aperto

Descrizione: paper
Tipologia: Versione Editoriale (PDF)
Licenza: Creative commons
Dimensione 6.38 MB
Formato Adobe PDF
6.38 MB Adobe PDF Visualizza/Apri

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/20.500.14243/526204
Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 29
  • ???jsp.display-item.citation.isi??? 23
social impact