PHOSPHOR AND LIGHT EMITTING DEVICE - DENKI KAGAKU KOGYO KK

Title:

PHOSPHOR AND LIGHT EMITTING DEVICE

Document Type and Number:

WIPO Patent Application WO/2015/002139

Kind Code:

A1

Abstract:

The present invention relates to: an (Sr, Ca)AlSiN3-based nitride phosphor which is capable of emitting red light with high luminance; and a light emitting device which has achieved excellent color rendering properties and luminous efficiency by using this phosphor. A phosphor according to the present invention is characterized by being represented by general formula M1aM2bM3cM4dNeOf, wherein: M1 represents one or more elements selected from among Eu and Ce; M2 represents two or more elements selected from among Mg, Ca, Sr, Ba and Zn, while essentially including Ca and Sr; M3 represents one or more elements selected from among Al, Ga, In and Sc; M4 represents one or more elements selected from among Si, Ge, Sn, Ti, Zr and Hf, while essentially including Si; N represents nitrogen; O represents oxygen; and a-f satisfy 0.00001 ≤ a ≤ 0.15, a + b = 1, 0.5 ≤ c ≤ 1.5, 0.5 ≤ d ≤ 1.5, c + d = 2, 2.5 ≤ e ≤ 3.0 and 0 ≤ f ≤ 0.5. This phosphor is also characterized in that the half-value width of the emission spectrum thereof when excited by light having a wavelength of 455 nm is from 72 nm to 86 nm (inclusive).

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Inventors:

TAKEDA YUSUKE (JP)
INABA RYOJI (JP)
KOBAYASHI MANABU (JP)
OKADA TAKUYA (JP)

Application Number:

PCT/JP2014/067369

Publication Date:

January 08, 2015

Filing Date:

June 30, 2014

Export Citation:

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Assignee:

DENKI KAGAKU KOGYO KK (JP)

International Classes:

C09K11/64; H01L33/50

Domestic Patent References:

WO2011132526A1

2011-10-27

Foreign References:

JP2012077288A	2012-04-19
JP2012512307A	2012-05-31
JP2011208139A	2011-10-20
JP2008127509A	2008-06-05
JP2009249395A	2009-10-29
JP2005336253A	2005-12-08
JP2013519226A	2013-05-23
US20140167601A1	2014-06-19

Other References:

HIROMU WATANABE: "Crystal structure and luminescence properties of SrxCa1-xAlSiN3:EU2+ mixed nitride phosphors, entire text, fig. 7.", JOURNAL OF ALLOYS AND COMPOUNDS, vol. 475, no. 1-2, 2009, pages 434 - 439

Attorney, Agent or Firm:

UCHIDA, NAOTO (JP)
Naoto Uchida (JP)

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