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Luminescence properties of novel Sr-Y-Si-Oxynitride yellow phosphor for LED applications

  • Journal of the Korean Crystal Growth and Crystal Technology
  • Abbr : J. Korean Cryst. Growth Cryst. Technol.
  • 2013, 23(4), pp.195~200
  • DOI : 10.6111/JKCGCT.2013.23.4.195
  • Publisher : The Korea Association Of Crystal Growth, Inc.
  • Research Area : Engineering > Materials Science and Engineering

정옥근 1,  Park, Jong cheon ORD ID 1,  Jeong Ho Ryu 2,  Hyun Cho 1

1부산대학교
2한국교통대학교

Accredited

ABSTRACT

Novel Sr-Y-Si-Oxynitride yellow phosphors were synthesized and the effect of calcination temperature, reduction temperature and Eu2+ concentration on their luminescence properties were studied. Optimal temperature conditions were found to be 1400oC and 1300oC for solid-state reaction and reduction, respectively. The synthesized Ba9Y2 + ySi6O24 − 3yN3y : Eu2+phosphors showed a single intense broadband emission in the range of 571~587 nm for 450 nm excitation light source. The highest luminescence intensity was obtained with Eu concentration of 3 mol% and concentration quenching was observed beyond 5 mol%. FE-SEM and PSA showed that the synthesized phosphors consists of particles with an average size of ~8.2 μm.

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