Near-infrared rechargeable glass-based composites for green persistent luminescence

N. Garcia Arango, S. Vuori, H. Byron, D. Van der Heggen, P. F. Smet, M. Lastusaari, L. Petit

Research output: Contribution to journalArticleScientificpeer-review

1 Citation (Scopus)
10 Downloads (Pure)

Abstract

The fabrication of Yb3+, Tm3+ co-doped oxyfluorophosphate glass-based composites, with green persistent luminescence after being charged with near-infrared light, is demonstrated. The mechanism responsible for the green afterglow after near-infrared illumination is unveiled. The composite is prepared using a modified melting process to limit the evaporation of fluorine during melting. Intense (blue and ultraviolet) up-conversion emission is obtained by optimizing the Yb2O3 and Tm2O3 concentrations. A heat treatment promotes volume precipitation of Yb3+, Tm3+ co-doped CaF2 crystals. Although the intensity of the blue up-conversion emission from the Tm3+ 1G4 level is lower in the highly Yb3+-concentrated glass-ceramic due to reverse energy transfer from Tm3+ to Yb3+, the heat treatment leads to an increase of the intensity of the emissions around 346 nm, 361 nm nm and 450 nm coming from the Tm3+ 1I6 and 1D2 levels. By combining the Yb3+ and Tm3+ ions with SrAl2O4:Eu2+,Dy3+crystals, green afterglow can be obtained after charging with near-infrared light.

Original languageEnglish
Article number167048
Number of pages12
JournalJournal of Alloys and Compounds
Volume927
Early online date5 Sept 2022
DOIs
Publication statusPublished - 2022
Publication typeA1 Journal article-refereed

Keywords

  • Glass
  • Glass-ceramic
  • Luminescence
  • Persistent luminescence
  • Tm and Yb codoping
  • Up-conversion

Publication forum classification

  • Publication forum level 1

ASJC Scopus subject areas

  • Mechanics of Materials
  • Mechanical Engineering
  • Metals and Alloys
  • Materials Chemistry

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