Title:
WAVELENGTH CONVERSION MEMBER AND LIGHT-EMITTING DEVICE EMPLOYING SAME
Document Type and Number:
WIPO Patent Application WO/2014/061748
Kind Code:
A1
Abstract:
Provided is a method for manufacturing a wavelength conversion member comprising a polycrystalline ceramic, the method including the steps of: A) mixing a substance constituting a silicon source, a substance constituting an aluminum source, a substance constituting a calcium source, and a substance constituting a europium source; B) burning the obtained mixture to obtain an oxynitride phosphor powder; then C) sintering the oxynitride phosphor powder in an inert atmosphere to obtain the polycrystalline ceramic, characterized in that the sintered oxynitride phosphor powder has a composition (excluding oxygen) represented by the compositional formula: Cax1Eux2Si12-(y+z)Al(y+z)OzN16-z (in the formula, x1, x2, y, and z are values such that 0 < x1 ≤ 3.40, 0.05 ≤ x2 ≤ 0.20, 3.5 ≤ y ≤ 7.0, 0 ≤ z ≤ 1), and the oxygen content of the oxynitride phosphor powder exceeds the stoichiometric oxygen content of the oxynitride phosphor represented by compositional formula (1) below, the excess amount of oxygen being from 1.1 to 11.5 mass%, inclusive, where the stoichiometric mass of the oxynitride phosphor represented by compositional formula (1) is expressed as 100 mass%. Also provided is a wavelength conversion member that, upon excitation by light of 300 nm to 500 nm wavelengths, emits fluorescent light in a broad wavelength band having a peak wavelength of from 590 nm to 610 nm, doing so at high conversion efficiency. Also provided is a wavelength conversion member that is more durable and more highly efficient than the prior art. Also provided is a light-emitting device in which the wavelength conversion member and a semiconductor light-emitting element are combined.
Inventors:
IWASHITA KAZUKI (JP)
SAKAI TAKUMA (JP)
UEDA TAKAYUKI (JP)
FUJINAGA MASATAKA (JP)
JIDA SHINSUKE (JP)
YAMANAGA MASATAKA (JP)
NAGAO YUKI (JP)
KAWANO TAKAFUMI (JP)
SAKAI TAKUMA (JP)
UEDA TAKAYUKI (JP)
FUJINAGA MASATAKA (JP)
JIDA SHINSUKE (JP)
YAMANAGA MASATAKA (JP)
NAGAO YUKI (JP)
KAWANO TAKAFUMI (JP)
Application Number:
PCT/JP2013/078219
Publication Date:
April 24, 2014
Filing Date:
October 17, 2013
Export Citation:
Assignee:
UBE INDUSTRIES (JP)
International Classes:
C09K11/64; H01L33/50
Domestic Patent References:
| WO2012098932A1 | 2012-07-26 | |||
| WO2013054901A1 | 2013-04-18 |
Foreign References:
| JP2005307012A | 2005-11-04 | |||
| JP2004238505A | 2004-08-26 | |||
| JP2012224757A | 2012-11-15 | |||
| JP2003258308A | 2003-09-12 | |||
| JP2010027704A | 2010-02-04 | |||
| JP2009096883A | 2009-05-07 | |||
| JP2009510757A | 2009-03-12 | |||
| JP2010538102A | 2010-12-09 |
Other References:
J. PHYS. CHEM. B, vol. 108, 2004, pages 12027 - 12031, XP002584652
CHIN. PHYS. B, vol. 21, no. 7, 7 July 2012 (2012-07-07), pages 077802 - 1 - 077802-8, XP020226039
See also references of EP 2910620A4
CHIN. PHYS. B, vol. 21, no. 7, 7 July 2012 (2012-07-07), pages 077802 - 1 - 077802-8, XP020226039
See also references of EP 2910620A4
Attorney, Agent or Firm:
AOKI, Atsushi et al. (JP)
Aoki 篤 (JP)
Aoki 篤 (JP)
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