发明名称 |
Method of manufacturing a rare-earth doped alkaline-earth silicon nitride phosphor, rare-earth doped alkaline-earth silicon nitride phosphor obtainable by such a method and radiation-emitting device comprising such a rare-earth doped alkaline-earth silicon nitride phosphor |
摘要 |
The invention relates to a method of manufacturing a rare-earth (RE) doped alkaline-earth silicon nitride phosphor (AE 2 Si 5 N 8 ) of a stoichiometric composition, said method comprising the step of selecting one or more compounds each comprising at least one element of the group comprising the rare-earth elements (RE), the alkaline-earth elements (AE), silicon (Si) and nitrogen (N) and together comprising the necessary elements to form the rare-earth doped alkaline-earth silicon nitride phosphor (AE 2 Si 5 N 8 :IRE) bringing the compounds at an elevated temperature in reaction for forming the rare-earth doped alkaline-earth silicon nitride phosphor (AE 2 Si 5 N 8 :RE), a small amount of oxygen, whether intentionally or not-intentionally added, being incorporated in the rare-earth doped alkaline-earth silicon nitride phosphor (AE 2 Si 5 N 8 :RE) thus formed.
According to the invention the creation of defects by formation of a non stoichiometric oxygen containing phosphor is at least partly prevented by partly substituting for the ions (AE, Si, N) of the alkaline-earth silicon nitride phosphor (AE 2 Si 5 N 8 ) suitable further elements of the periodic system by which vacancies are created, filled or annihilated resulting in the formation of a modified alkaline-earth silicon nitride phosphor (AE 2 Si 5 N 8 ) having a stoichiometric composition. In this way a modified phosphor is obtained having excellent and stable optical properties. The invention further comprises a modified phosphor obtainable by a method according to the invention and a radiation-emitting device comprising such a phosphor. |
申请公布号 |
EP2058382(A1) |
申请公布日期 |
2009.05.13 |
申请号 |
EP20070118436 |
申请日期 |
2007.10.15 |
申请人 |
LEUCHTSTOFFWERK BREITUNGEN GMBH;LEDON LIGHTING JENNERSDORF GMBH |
发明人 |
HINTZEN, HUBERTUS THERESIA JOZEF MARIA;DUAN, CHENG-JUN;DELSING, ANNE CHARLOTTE ANOINETTE;STARICK, DETLEF;ROESLER, SYLKE;ROESLER, SVEN |
分类号 |
C09K11/59;C09K11/64;C09K11/65 |
主分类号 |
C09K11/59 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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