Color tunable emission in Ce3+ and Tb3+ co-doped Ba2Ln(BO3)2Cl (Ln = Gd and Y) phosphors for white light-emitting diodes

Niumiao Zhang, Chongfeng Guo*, Heng Jing, Jung Hyun Jeong

*Corresponding author for this work

Research output: Contribution to journalArticle

33 Citations (Scopus)

Abstract

(Graph Presented) Ce3+ and Tb3+ co-doped Ba 2Ln(BO3)2Cl (Ln = Y and Gd) green emitting phosphors were prepared by solid state reaction in reductive atmosphere. The emission and excitation spectra as well as luminescence decays were investigated, showing the occurrence of efficient energy transfer from Ce 3+ to Tb3+ in this system. The phosphors exhibit both a blue emission from Ce3+ and a green emission from Tb3+ under near ultraviolet light excitation with 325-375 nm wavelength. Emission colors of phosphors could be tuned from deep blue through cyan to green by adjusting the Tb3+ concentrations. The energy transfer efficiency and emission intensity of Ba2Y(BO3)2Cl:Ce 3+,Tb3+ precede those of Ba2Gd(BO 3)2Cl:Ce3+,Tb3+, and the sample Ba2Y(BO3)2Cl:0.03Ce3+, 0.10Tb 3+ is the best candidate for n-UV LEDs.

Original languageEnglish
Pages (from-to)556-561
Number of pages6
JournalSpectrochimica Acta - Part A: Molecular and Biomolecular Spectroscopy
Volume116
DOIs
Publication statusPublished - 2013

Keywords

  • Luminescence
  • Optical property
  • Phosphor

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