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Title:
FLUORESCENT BODY, FLUORESCENT BODY MANUFACTURING METHOD, LIGHT-EMITTING ELEMENT, LIGHT-EMITTING DEVICE, AND IMAGE DISPLAY DEVICE
Document Type and Number:
WIPO Patent Application WO/2020/262200
Kind Code:
A1
Abstract:
A fluorescent body according to the present invention has a composition represented by general formula Mα(L,A)βXγ:Euδ, wherein at least some of elements M, each of which is of a fluorescent body host crystal represented by Mα(L,A)βXγ, are substituted with Eu as an activation material. The fluorescent body is configured such that: M represents one or more elements (including at least Sr) selected from Mg, Ca, Sr, Ba, and Zn; L represents one or more elements selected from Li, Na, and K; A represents one or more elements selected from Al, Ga, B, In, Sc, Y, La, and Si; X represents one or more elements (excluding the case where X is only N) selected from O, N, F, and Cl; α, β, γ, and δ satisfy 8.70≤α+β+γ+δ≤9.30, and 0.00<α≤1.30, 3.70≤β≤4.30, 3.70≤γ≤4.30, and 0.00<δ≤1.30 are satisfied; and, in a fluorescence spectrum generated by irradiation with light having a wavelength of 260 nm, in a case where I0 represents a fluorescence intensity at a wavelength of 569 nm and I1 represents a fluorescence intensity at a wavelength of 617 nm, a fluorescence intensity ratio I1/I0 is 0.01-0.4.

Inventors:
TOYOSHIMA HIROAKI (JP)
KAWAGOE MITSURU (JP)
Application Number:
JP2020/024014
Publication Date:
December 30, 2020
Filing Date:
June 18, 2020
Export Citation:
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Assignee:
DENKA COMPANY LTD (JP)
International Classes:
C09K11/08; C09K11/59; C09K11/61; C09K11/62; C09K11/63; C09K11/64; C09K11/77; C09K11/78; C09K11/79; C09K11/80; C09K11/85; C09K11/86; H01J1/63; H01J11/42; H01J29/20; H01L33/50
Domestic Patent References:
WO2008004640A12008-01-10
WO2019188319A12019-10-03
Foreign References:
JP2015526532A2015-09-10
CN105400513A2016-03-16
Attorney, Agent or Firm:
HAYAMI Shinji (JP)
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