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    • 5. 发明专利
    • Inorganic electroluminescent device
    • 无机电致发光器件
    • JP2010040217A
    • 2010-02-18
    • JP2008198957
    • 2008-07-31
    • Fujifilm Corp富士フイルム株式会社
    • SHIRATA MASAFUMI
    • H05B33/14C09K11/00C09K11/56C09K11/88
    • H05B33/18C09K11/584C09K11/876
    • PROBLEM TO BE SOLVED: To provide an inorganic EL device having high emission efficiency and durability.
      SOLUTION: The inorganic EL device includes a multilayer structure containing at least one pair of electrodes, and a light-emitting layer provided between the electrodes. The light-emitting layer contains at least a matrix material, at least an element forming a luminescent center, and Cu, wherein the matrix material is selected from the group consisting of II Gourp-XVI Group compound, XII Group-XVI Group compounds, and mixed crystals thereof. The light-emitting layer constitutes an inorganic phosphor layer having a composition gradient that Cu concentration in the host material varies by a factor of at least 10 in a thickness direction of the light-emitting layer.
      COPYRIGHT: (C)2010,JPO&INPIT
    • 要解决的问题:提供一种具有高发光效率和耐久性的无机EL器件。 解决方案:无机EL器件包括含有至少一对电极的多层结构和设置在电极之间的发光层。 发光层至少含有基质材料,至少形成发光中心的元素和Cu,其中基质材料选自II Gourp-XVI族化合物,XII族-VI族化合物和 其混晶。 发光层构成无机荧光体层,其组成梯度使主体材料中的Cu浓度在发光层的厚度方向上变化10倍以上。 版权所有(C)2010,JPO&INPIT
    • 9. 发明专利
    • Method for producing a zinc sulfide-based phosphor
    • JP5337158B2
    • 2013-11-06
    • JP2010523836
    • 2009-07-30
    • 株式会社クラレ
    • 嘉久 辻一真 井上淳 高井秀治 岩崎
    • C09K11/08C09K11/56
    • C09K11/625C09K11/876H05B33/14
    • The present invention provides a method for producing a zinc sulfide based phosphor by firing a zinc sulfide based phosphor precursor, comprising at least: a first firing step of firing a mixture containing a zinc sulfide based phosphor precursor, sulfur, and a chlorine-containing flux; and a second firing step of further firing the fired product obtained from the first firing step, wherein the first firing step comprises: heating the mixture in an atmosphere wherein an air stream is introduced so that a temperature of the mixture is increased from normal temperature to a transformation temperature at which a crystal system of the phosphor precursor is transformed; when a temperature of the mixture is increased above the transformation temperature, switching the atmosphere to a nitrogen atmosphere and continuing the heating of the mixture; and when the temperature of the mixture reaches a temperature in a range of 1000°C to 1200°C, inclusive, maintaining the temperature of the mixture at a constant level and thereafter rapidly quenching the mixture and washing the mixture to obtain a fired product; and wherein the second firing step comprises heating in the nitrogen atmosphere the fired product obtained from the first firing step so that the temperature of the fired product is increased from normal temperature to a temperature in a range of 650°C to 1000°C, inclusive; and when a temperature of the fired product reaches the temperature in the range of 650°C to 1000°C, inclusive, introducing oxygen while maintaining the temperature of the fired product and thereafter rapidly quenching the fired product and washing the fired product to obtain a zinc sulfide based phosphor. Use of the method of the present invention makes it possible to provide a zinc sulfide based phosphor material suitable for use in the production of an EL device that shows high brightness.