PHOSPHOR, METHOD FOR PRODUCING SAME AND LIGHT EMITTING ELEMENT

Title:

PHOSPHOR, METHOD FOR PRODUCING SAME AND LIGHT EMITTING ELEMENT

Document Type and Number:

WIPO Patent Application WO/2020/203234

Kind Code:

A1

Abstract:

The present invention provides a phosphor which emits near-infrared light upon irradiation of visible light or ultraviolet light. A phosphor according to one embodiment of the present invention contains an inorganic substance which contains at least elemental Eu, elemental M(3) (M(3) is at least one element that is selected from the group consisting of Al, Y, La and Gd), elemental Si and elemental nitrogen, and also contains, if necessary, at least one element that is selected from the group consisting of elemental M(1) (M(1) is elemental Li), elemental M(2) (M(2) is at least one element that is selected from the group consisting of Mg, Ca, Ba and Sr) and elemental oxygen, while having the maximum value of an emission peak at a wavelength within the range of from 760 nm to 850 nm (inclusive) upon irradiation of an excitation source.

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Inventors:

HIROSAKI NAOTO (JP)

Application Number:

PCT/JP2020/011567

Publication Date:

October 08, 2020

Filing Date:

March 16, 2020

Export Citation:

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Assignee:

NAT INST MATERIALS SCIENCE (JP)

International Classes:

C09K11/08; C09K11/64; C09K11/79; C09K11/80; H01L33/50; H01S5/02

Domestic Patent References:

WO2014068907A1	2014-05-08
WO2005019376A1	2005-03-03

Foreign References:

CN109370587A	2019-02-22
CN108467733A	2018-08-31
CN108630794A	2018-10-09
CN109135747A	2019-01-04
JP3837551B2	2006-10-25
JP3837588B2	2006-10-25
JP3921545B2	2007-05-30
EP1104799A1	2001-06-06

Other References:

KREVEL, VAN, J. W. H.: "Ph.D. thesis", 2000, TECHNISCHE UNIVERSITEIT EINDHOVEN, article "On new rare-earth doped M-Si-Al-O-N materials : luminescence properties and oxidation resistance"
Y. Q. LIG. DE WITHH. T. HINTZEN: "Journal of Luminescence", vol. 116, 2006, ELSEVIER, article "Luminescence properties of Ce3+-activated alkaline earth silicon nitride M Si N (M=Ca, Sr, Ba) materials", pages: 107 - 116
See also references of EP 3950884A4

Attorney, Agent or Firm:

AIKAWA, Toshihiko (JP)

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