Green phosphorescence of CaAl2O4:Tb3+,Ce3+ through persistence energy transfer
- 4 March 2002
- journal article
- research article
- Published by AIP Publishing in Applied Physics Letters
- Vol. 80 (9), 1535-1537
- https://doi.org/10.1063/1.1456955
Abstract
Single-crystal CaAl2O4 fibers doped with Ce3+ or Tb3+ or double doped with Tb3+ and Ce3+ were prepared by the laser-heated pedestal-growth method. Ce3+-doped CaAl2O4 was found to have persistent phosphorescence in the blue violet lasting more than 10 h, while Tb3+-doped CaAl2O4 showed only a weak afterglow. However, long persistent green phosphorescence from Tb3+ was observed in the doubly doped fiber, CaAl2O4:Tb3+,Ce3+. It was found that the enhanced green phosphorescence from Tb3+ is due to persistence energy transfer from the thermally released electrons to Ce3+ followed by energy transfer to Tb3+. The finding suggests a promising approach for controlling the color of persistent phosphors.This publication has 11 references indexed in Scilit:
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