Journal
JOURNAL OF RARE EARTHS
Volume 38, Issue 5, Pages 514-522Publisher
ELSEVIER
DOI: 10.1016/j.jre.2020.01.001
Keywords
Garnet; Scintillation; Band gap engineering; Energy transfer; Rare earths
Categories
Funding
- National Natural Science Foundation of China [21671201, U1632101, 61905289, 11904425]
- Postdoctoral Science Foundation of China [2017M622846, 2019M663202]
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Tuning of phosphor luminescence properties, including the emission energy/intensity and thermal stability, is an important way to develop superior luminescent materials for diverse applications. In this work, we discuss the effect of band gap engineering and energy transfer on the luminescence properties of Ce3+ or Pr3+ doped (Y,Gd)AGG systems, and analyze the underlying reasons for their different phenomena. By using VUV-UV excitation spectra and constructing VRBE schemes, the changes of host band structure, 5d excited level energies and emission thermal stability of Ce3+ and Pr3+ with the incorporation of Gd3+ ions were studied. In addition, the energy transfer dynamics was also investigated in terms of the luminescence decay curves. This work demonstrates a way to tune phosphor luminescence properties by combining band gap engineering and energy transfer tailoring and provides an inspiring discussion on the different results of Gd3+ doping on the Ce3+ and Pr3+ emissions. (C) 2020 Chinese Society of Rare Earths. Published by Elsevier B.V. All rights reserved.
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