Effects of flux additives on characteristics of Y2.95Al5O12:0.05Ce3+ Phosphor: Thermal stability and application to WLEDs

Chung Hao Chiang, Te Hsing Liu, Han Yu Lin, Hung Yi Kuo, Sheng Yuan Chu

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9 Citations (Scopus)


Y2.95 Al5O12:0.05Ce3+ phosphors were synthesized via the solid-state reaction method using fluxes of H3BO3 and BaF2. The thermal stability and luminescence of Y2.95Al5O12:0.05Ce 3+ prepared with 6 wt% BaF2 flux additive (Sample II) were compared with those of Y2.95Al5O12:0.05Ce3+ prepared with 7 wt% H3 BO3 flux additive (Sample I). The crystallinity of Sample I was found to be better than that of Sample II. This difference in crystallinity, which led to a difference in thermal stability, is well explained by the presence of defects. Moreover, Sample I, Sample II, and commercial Y3 Al5 O12:{\hbox{Ce}} 3+ phosphors were coated onto 450-nm chips for the fabrication of white light-emitting diodes (WLEDs). The luminous efficacy (@ 350 mA) of Sample-I-based (68.98 lm/W) and commercial-Y3Al5O12: Ce 3+ -based (70.87 lm/W) WLEDs was lower than that (77.2 lm/W) of the Sample-II-based WLED due to the powder morphology of the phosphors.

Original languageEnglish
Article number7065206
Pages (from-to)466-470
Number of pages5
JournalJournal of Display Technology
Issue number5
Publication statusPublished - 2015 May 1

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Electrical and Electronic Engineering

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