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    RARE-EARTH DOPED ALKALINE-EARTH SILICON NITRIDE PHOSPHOR, METHOD FOR PRODUCING AND RADIATION CONVERTING DEVICE COMPRISING SUCH A PHOSPHOR
    5.
    发明公开
    RARE-EARTH DOPED ALKALINE-EARTH SILICON NITRIDE PHOSPHOR, METHOD FOR PRODUCING AND RADIATION CONVERTING DEVICE COMPRISING SUCH A PHOSPHOR 有权
    SE-掺杂ERDALKALISILICIUMNITRIDLEUCHTSTOFF，及其制造方法这种荧光综合辐射转换装置

    公开(公告)号：EP2212400A2

    公开(公告)日：2010-08-04

    申请号：EP08838709.7

    申请日：2008-10-14

    申请人： Leuchtstoffwerk Breitungen GmbH ,  Ledon Lighting Jennersdorf GmbH

    发明人： DUAN, Cheng-Jun ,  HINTZEN, Hubertus Theresia ,  RÖSLER, Sylke ,  STARICK, Detlef ,  RÖSLER, Sven ,  DELSING, Anne Charlotte Anoinette

    IPC分类号： C09K11/08 ,  C09K11/79 ,  C09K11/80

    CPC分类号： C09K11/0883 ,  C09K11/773 ,  C09K11/7734

    摘要： The invention relates to a method of manufacturing a rare-earth doped alkaline-earth silicon nitride phosphor 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 (AE2Si5N8:RE). The method further comprises the step of bringing the compounds at an elevated temperature in reaction for forming the rare-earth doped alkaline-earth silicon nitride phosphor (AE2Si5N8:RE). In such a method normally a small amount of oxygen, whether intentionally or not-intentionally added, will be incorporated in the rare-earth doped alkaline-earth silicon nitride phosphor (AE2Si5N8:RE). 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 (AE2Si5N8:RE) 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 (AE2Si5N8:RE) having a stoichiometric composition. In this way a modified phosphor is obtained having excellent and stable optical properties. The invention further relates to a modified phosphor obtainable by the above-mentioned method and a radiation converting device comprising such a phosphor.