FLUORIDE PHOSPHOR AND METHOD OF PRODUCING THE SAME, WAVELENGTH CONVERSION MEMBER, AND LIGHT EMITTING DEVICE
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United States of America Patent
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Issued Date -
Dec 22, 2022
app pub date -
Jun 20, 2022
filing date -
Jun 20, 2022
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Abstract
A fluoride phosphor, comprising fluoride particles having an average particle size of 0.1 μm to 7 μm and a maximum particle size of 1 μm to 18 μm, wherein a ratio of the maximum particle size with respect to the average particle size is higher than 1. The fluoride particles have a composition containing an element M containing at least one selected from the group consisting of Group 4 elements, Group 13 elements, and Group 14 elements; an alkali metal; Mn; and F. In the composition, when the number of moles of the alkali metal is 2, the number of moles of Mn is more than 0 but less than 0.2, the number of moles of the element M is more than 0.8 but less than 1, and the number of moles of F is more than 5 but less than 7.
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