BaMgAl10O17:Eu blue phosphors with MgO coating and microwave irradiation

Kuan Ting Kuo, Shu Ping Lee, San-Yuan Chen*, Bing Ming Cheng, Hsiao Chi Lu, Dean-Mo Liu, Chu Chi Ting

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

12 Scopus citations

Abstract

Europium-activated barium magnesium aluminate (BaMgAl10O17:Eu (BAM)) phosphor particles were modified by surface coating with MgO using a polyol method. The photoluminescence (PL) properties of the MgO-coated BAM phosphors showed slightly improved blue-emission intensity compared to the unmodified ones, and reached a stronger peak intensity with 5.25% MgO coating, under vacuum ultraviolet (VUV) 147 nm excitation. Upon microwave irradiation on the MgO-coated BAM phosphors, the PL properties of the MgO-coated phosphors exhibited a much enhanced relative PL ratio, and a maximum relative PL ratio can be achieved when as high as 10.5% MgO was deposited on the phosphor surface. However, for mechanically ground phosphor powder, it was found that although the intensity of the MgO-coated BAM turned stronger with increasing MgO concentration under microwave irradiation, the purity of the resulting luminescence was slightly disrupted by the presence of a new peak near 470 nm, corresponding to BaMg3Al14O25 compound.

Original languageEnglish
Pages (from-to)446-450
Number of pages5
JournalJournal of Physics and Chemistry of Solids
Volume69
Issue number2-3
DOIs
StatePublished - 1 Feb 2008

Keywords

  • A. Ceramics
  • A. Optical materials
  • D. Luminescence

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