Jump to main content
Jump to site search

Issue 17, 2015
Previous Article Next Article

A novel tunable blue-green-emitting CaGdGaAl2O7:Ce3+,Tb3+ phosphor via energy transfer for UV-excited white LEDs

Author affiliations

Abstract

CaGdGaAl2O7 and CaGdGaAl2O7:Ce3+,Tb3+ have been synthesized by a traditional solid state reaction for the first time. The Rietveld refinement confirmed that CaGdGaAl2O7 has a tetragonal crystal system with the space group P[4 with combining macron]21m. The photoluminescence properties show that the obtained phosphors can be efficiently excited in the range from 330 to 400 nm, which matches perfectly with commercial UV LED chips. A tunable blue-green emitting CaGdGaAl2O7:Ce3+,Tb3+ phosphor has been obtained, by codoping Ce3+ and Tb3+ ions into the host and varying their relative ratios, and may be a good candidate for blue-green components in UV white LEDs. The luminescence properties and lifetimes reveal an efficient energy transfer from the Ce3+ to Tb3+ ions. The energy transfer is demonstrated to be a dipole–quadrupole mechanism, and the critical distance for Ce3+ to Tb3+ calculated by the concentration quenching is 12.25 Å.

Graphical abstract: A novel tunable blue-green-emitting CaGdGaAl2O7:Ce3+,Tb3+ phosphor via energy transfer for UV-excited white LEDs

Back to tab navigation

Supplementary files

Publication details

The article was received on 25 Dec 2014, accepted on 13 Mar 2015 and first published on 18 Mar 2015


Article type: Paper
DOI: 10.1039/C4DT03999H
Citation: Dalton Trans., 2015,44, 8100-8106

  •   Request permissions

    A novel tunable blue-green-emitting CaGdGaAl2O7:Ce3+,Tb3+ phosphor via energy transfer for UV-excited white LEDs

    C. Liang, H. You, Y. Fu, X. Teng, K. Liu and J. He, Dalton Trans., 2015, 44, 8100
    DOI: 10.1039/C4DT03999H

Search articles by author

Spotlight

Advertisements