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US 2018/0002601 A1Published application
Beta-sialon phosphor and method for producing the same, and light-emitting member and light emitting device
AssigneeDenka Company Limited
InventorsHideyuki EMOTO, Toshiaki NAGUMO
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Abstract
Provided is a β-sialon phosphor having a β-sialon as a host crystal and containing Eu as a luminescent center, wherein when chemical states of Eu are classified into three states: Eu2+, Eu3+ and an intermediate state thereof (hereinafter, referred to as Eum), a ratio of them present in the β-sialon phosphor satisfies the relationships: 0.1<Eum/(Eu2++Eu3++Eum)<0.4 and Eu2+/(Eu2++Eu3+)>0.7.
Claims6
A β-sialon phosphor having a β-sialon as a host crystal and containing Eu as a luminescent center, wherein when chemical states of Eu are classified into three states:
- Eu2+, Eu3+ and an intermediate state thereof (hereinafter, referred to as Eum), a ratio of the chemical states of Eu present in the β-sialon phosphor satisfies the relationships:
- 0.1<Eum/(Eu2++Eu3++Eum)<0.4 and Eu2+/(Eu2++Eu3+)>0.7.
Dependencies are inferred from the claim text.