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    RARE-EARTH DOPED ALKALINE-EARTH SILICON NITRIDE PHOSPHOR, METHOD FOR PRODUCING AND RADIATION CONVERTING DEVICE COMPRISING SUCH A PHOSPHOR
    1.
    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.

    ERDALKALIMETALLSILIKAT-LEUCHTSTOFFE UND VERFAHREN ZUR VERBESSERUNG IHRER LANGZEITSTABILITÄT
    6.
    发明公开
    ERDALKALIMETALLSILIKAT-LEUCHTSTOFFE UND VERFAHREN ZUR VERBESSERUNG IHRER LANGZEITSTABILITÄT 有权
    碱土金属-LIGHT物质和一种用于改善您的长期稳定性

    公开(公告)号：EP2396385A1

    公开(公告)日：2011-12-21

    申请号：EP10773598.7

    申请日：2010-10-14

    申请人： Leuchtstoffwerk Breitungen GmbH

    发明人： KEMPFERT, Wolfgang ,  RÖSLER, Sylke ,  RÖSLER, Sven ,  DUAN, Cheng-Jun ,  DENNSTEDT, Rudolf

    IPC分类号： C09K11/02 ,  C09K11/77

    CPC分类号： C09K11/02 ,  C09K11/025 ,  C09K11/0838 ,  C09K11/576 ,  C09K11/7734 ,  Y10T428/2991 ,  Y10T428/2993

    摘要： The present invention relates to alkaline earth metal silicate luminophores having improved long-term stability and to a corresponding method for improving the long-term stability of alkaline earth metal silicate luminophores. The luminophore according to the invention is a luminophore comprising a base lattice according to the general chemical formula EA
    x Si
    y O
    z , where x, y, z > 0. The component EA is formed by one or more alkaline earth metals. An activator, for example Eu
    2+ or Mn
    2+ , is doped into the base lattice. The luminophore has the fundamental property to absorb radiation in a first wavelength range and emit radiation in a second wavelength range that is different from the first wavelength range. The luminophore is designed in the form of crystals. According to the invention, the surfaces of the crystals of the luminophore are chemically modified such that at least portions of the surfaces thereof are formed by a chemical compound of the general formula Ea
    u Z
    2 . The component Z is formed by anions, which can be chemically combined with the EA cations of the luminophore. The variable u is equal to an ion charge of the anions Z. The chemical modification is therefore not a coating.