Oxynitride phosphor and a light emitting device

Details Oxynitride phosphor and a light emitting device Oxynitride phosphor and a light emitting device

2005-08-29

2009-10-06

Koslow, C. Melissa (Department: 1793)

Compositions

Inorganic luminescent compositions

Compositions containing halogen; e.g., halides and oxyhalides

C313S503000, C257S098000

Reexamination Certificate

active

07597821

ABSTRACT:
One preferred embodiment according to the present invention, there is provided an oxynitride phosphor and a light emitting device using the same that is able to reduce production costs and chromaticity shifts. The phosphor is represented by a general formula of (Ca1-zYz)x(Si, Al)12(O, N)16:Eu2+y, and has a main phase of substantially an alpha SiAlON crystal structure, wherein the value z is larger than 0 and smaller than 0.15.

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J. W. H. van Krevel, et al.: “Luminescence Properties of Terbium-, Cerium-, or Europium-Doped α-Sialon Materials”; Journal of Solid State Chemistry, 165, 2002, p. 19-24.
Rong-Jin Xie, et al., “Eu2+-doped, Ca-α-SiAION: A yellow phosphor for white light-emitting diodes”, Applied Physics Letters, vol. 84, No. 26, Jun. 28, 2004, pp. 5404-5406.

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