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A review on inorganic phosphor materials for white LEDs

  • Journal of the Korean Crystal Growth and Crystal Technology
  • Abbr : J. Korean Cryst. Growth Cryst. Technol.
  • 2012, 22(5), pp.233~240
  • DOI : 10.6111/JKCGCT.2012.22.5.233
  • Publisher : The Korea Association Of Crystal Growth, Inc.
  • Research Area : Engineering > Materials Science and Engineering

Jeong Ho Ryu 1,  황석민 1,  이재빈 1,  김세현 1

1한국교통대학교

Accredited

ABSTRACT

White LEDs (light-emitting diodes) are promising new-generation light sources which can replace conventional lamps due to their high reliability, low energy consumption and eco-friendly effects. This paper briefly reviews recent progress of oxy/nitride host phosphor and quantum dot materials with broad excitation band characteristics for phosphorconverted white LEDs. Among oxy/nitride host materials, M2Si5N8 : Eu2+, MAlSiN3 : Eu2+ M-SiON (M = Ca, Sr, Ba), α/β-SiAlON : Eu2+ are excellent phosphors for white LED using blue-emitting chip. They have very broad excitation bands in the range of 440~460 nm and exhibit emission from green to red. In this paper, In this review we focus on recent developments in the crystal structure, luminescence and applications of the oxy/nitride phosphors for white LEDs. In addition, the application prospects and current trends of research and development of quantum dot phosphors are also discussed.

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