PHOSPHOR, LIGHT EMITTING ELEMENT, AND LIGHT EMITTING DEVICE

WIPO Patent Application WO/2015/129742

A1

The present invention pertains to the following: a phosphor in which humidity resistance is improved by modifying the particle surface of an Mn4+ activated complex fluoride phosphor which can achieve high luminance red-color light emission; and a light emitting element and a light emitting device which excel in color rendering properties and in stability as a result of using such phosphor. This phosphor is represented by general formula A2MF6:Mn4+. Element A is an alkali metal element containing at least K. Element M is at least one type of metal element selected from among Si, Ge, Sn, Ti, Zr, and Hf. F is fluorine and Mn is manganese. The phosphor is characterized in that the particle surface thereof is modified so that the content of fluorine in a supernatant liquid is no more than 2 wt%, the supernatant liquid being obtained after dispersing fluorine in a methanol water mixture (with a water content of 10 mass%) of 100 parts by mass ratio and leaving the same to stand for 10 minutes.

ICHIKAWA MASAYOSHI (JP)
EMOTO HIDEYUKI (JP)
YANAGI SHINICHI (JP)
ITO KAZUHIRO (JP)

PCT/JP2015/055383

September 03, 2015

February 25, 2015

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DENKI KAGAKU KOGYO KK (JP)

C09K11/61; C09K11/08; H01L33/50

WO2012128837A1	2012-09-27
WO2014103932A1	2014-07-03

JP2013533363A	2013-08-22
JP2015044951A	2015-03-12
JP2015028148A	2015-02-12

UCHIDA, NAOTO (JP)
Naoto Uchida (JP)

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