FLUORIDE PHOSPHOR, METHOD FOR MANUFACTURING SAME, AND LIGHT-EMITTING DEVICE
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United States of America Patent
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Jul 18, 2024
app pub date -
May 26, 2022
filing date -
May 31, 2021
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Abstract
Provided is a fluoride phosphor that can improve reliability in a light-emitting device. The fluoride phosphor includes fluoride particles and an oxide covering at least a portion of the surface of the fluoride particles. The oxide contains at least one element selected from the group consisting of Si, Al, Ti, Zr, Sn, and Zn, and a content percentage of the oxide is in a range from 2 mass % to 30 mass %. The fluoride particles have a composition containing an element M including at least one element selected from the group consisting of Group 4 elements, Group 13 elements, and Group 14 elements, an alkali metal, Mn, and F, and when the number of moles of the alkali metal is 2, the number of moles of Mn is in a range greater than 0 and less than 0.2, the number of moles of the element M is a range greater than 0.8 and less than 1, and the number of moles of F is in a range greater than 5 and less than 7.
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