Visible emission and energy transfer in Tb3+/Dy3+ co-doped phosphate glasses

Yan Sun, Fei Yu, Meisong Liao, Juping Ma, Xin Wang, Dongbing He, Weiqing Gao, Jonathan Knight, Lili Hu

Research output: Contribution to journalArticle

Abstract

In this work, we systematically study the spectroscopic properties of Tb3+/Dy3+ co-doped phosphate glasses in the visible spectral region and explore the sensitization role of Dy3+ in the enhancement of visible fluorescence of Tb3+ ions. Judd-Ofelt parameters Ω2 and Ω46 of the phosphate glass as host for Tb3+ are calculated as 21.60 × 10-20 cm2 and 0.73, respectively, based on the measured spectral absorption. Multiple energy transfer (ET) routes from Dy3+ to Tb3+ and their efficiencies are characterized, and the enhanced fluorescence properties of Tb3+ are investigated, including the emission spectral strength and the spontaneous emission lifetime as functions of Dy3+ doping concentration. The efficient nonradiative ET processes between Dy3+ and Tb3+ allow a moderate concentration level of Tb3+ to achieve favorably stronger spectral absorption at blue and ultraviolet wavelengths. Tb3+/Dy3+ co-doped phosphate glass shows promising potential for phosphors and lasing operation at visible wavelengths.

Original languageEnglish
JournalJournal of the American Ceramic Society
Early online date2 Aug 2020
DOIs
Publication statusE-pub ahead of print - 2 Aug 2020

Keywords

  • Dy/Tb
  • energy transfer process
  • luminescence
  • phosphate glass

ASJC Scopus subject areas

  • Ceramics and Composites
  • Materials Chemistry

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