Crystal structures and luminescence properties of ALN-deficient Eu2+-activated Ca-α-SiAlON Phosphor

Sung Soon Park, Bo Yun Jang, Joo Seok Park, Sahn Nahm

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

Eu2+-doped Ca-α-SiAlON phosphor was synthesized by normal pressure sintering with conventional tube furnace, and its crystal structures and luminescence properties were investigated. Eu2+-doped Ca-α-SiAlON phosphor exhibited an orange light peaking at 583 nm. During the annealing, some of the raw materials evaporated, which resulted in unreacted AlN in the final product. In order to obtain a final product with a single α-phase, we prepared samples with various AlN-deficient compositions, and we studied the effects on crystal structures and luminescence properties. For the sample with 15 mol% AlN-deficient composition, 18% enhancement of the intensity was obtained with the disappearance of excess AlN. In addition, the internal quantum efficiency (IQE) was measured using a specially designed integrating sphere, and 56.82% IQE was gained from Eu2+-doped Ca-α-SiAlON phosphor.

Original languageEnglish
Pages (from-to)990-993
Number of pages4
JournalJournal of the Korean Physical Society
Volume57
Issue number41
DOIs
Publication statusPublished - 2010 Oct 15

Keywords

  • Crystal structure
  • Europium
  • Luminescence
  • Phosphor
  • α-SiAlON

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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