Fluorescent substance and production method thereof
AssigneeDexerials Corporation
InventorsKazuhiro Yagihashi, Tsuneo Kusunoki, Masahide Daimon, Yu Nomura, Shuji Ohashi
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Abstract
A fluorescent substance, represented by the following general formula (1): Ca1-x(SeyS1-y):Eux (1) where y is a value in the range of 0.5 to 1, wherein an absolute value of a difference between an optimal value (nm) of an emission peak wavelength corresponding to the value of y, and a measured value (nm) of the emission peak wavelength is 5 nm or less, and wherein an absolute value of a difference between an optimal value (nm) of a full width at half maximum of emission corresponding to the value of y, and a measured value (nm) of the full width at half maximum of emission is 6 nm or less.
Claims16
A fluorescent substance, represented by the following general formula (1):
- Ca1-x(SeyS1-y):Eux (1)
- where y is a value in the range of 0.5 to 1 and x=0.0001 to 0.1,
- wherein an absolute value of a difference between an optimal value (nm) of an emission peak wavelength corresponding to the value of y, and a measured value (nm) of the emission peak wavelength is 5 nm or less, and
- wherein an absolute value of a difference between an optimal value (nm) of a full width at half maximum of emission corresponding to the value of y, and a measured value (nm) of the full width at half maximum of emission is 6 nm or less.
A fluorescent substance, comprising:
- europium-containing calcium selenide sulfide, represented by the following general formula (2):
- Ca1-x(SeyS1-y):Eux (2)
- where y is a value in the range of 0.5 or greater but less than 1 and x=0.0001 to 0.1,
- wherein the fluorescent substance is produced by mixing calcium selenide, calcium sulfite•europium, and ammonium chloride, and firing a mixture thereof.
A fluorescent substance, comprising:
- europium-containing calcium selenide, represented by the following general formula (3):
- Ca1-xSe:Eux (3)
- wherein x=0.0001 to 0.1 and the fluorescent substance is produced by mixing calcium selenide, europium oxide, and ammonium chloride, and firing a mixture thereof.
A production method of a fluorescent substance, comprising:
- mixing calcium selenide, calcium sulfite•europium, and ammonium chloride, and firing a mixture thereof, to thereby produce a fluorescent substance composed of europium-containing calcium selenide sulfide represented by the following general formula (2):
- Ca1-x(SeyS1-y):Eux (2)
- where y is a value in the range of 0.5 or greater but less than 1 and x=0.0001 to 0.1.
A production method of a fluorescent substance, comprising:
- mixing calcium selenide, europium oxide, and ammonium chloride, and firing a mixture thereof, to thereby produce a fluorescent substance composed of europium-containing calcium selenide represented by the following general formula (3):
- Ca1-xSe:Eux (3)
- where x=0.0001 to 0.1.
A production method of a surface-coated fluorescent substance, comprising:
- coating a surface of the following fluorescent substance (I) or (II) with a fluororesin in a non-aqueous atmosphere:
- (I) a fluorescent substance composed of europium-containing calcium selenide sulfide represented by the following general formula (2), which is produced by a method containing mixing calcium selenide, calcium sulfite•europium, and ammonium chloride, and firing a mixture thereof,
- Ca1-x(SeyS1-y):Eux (2)
- where y is a value in the range of 0.5 or greater but less than 1 and x=0.0001 to 0.1;
- and
- (II) a fluorescent substance composed of europium-containing calcium selenide represented by the following general formula (3), which is produced by a method containing mixing calcium selenide, europium oxide, and ammonium chloride, and firing a mixture thereof
- Ca1-xSe:Eux (3)
- where x=0.0001 to 0.1.
Dependencies are inferred from the claim text.