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    • 8. 发明公开
    • PHOSPHORESCENT MATERIAL, PROCESS FOR PRODUCING THE SAME, AND PHOSPHORESCENT DISPLAY ELEMENT
    • 磷光体材料,紫色ZE SEINER HERSTELLUNG UND PHOSPHORESZIERENDES显示元件
    • EP1901262A1
    • 2008-03-19
    • EP06756535.8
    • 2006-05-24
    • Japan Science and Technology Agency
    • YAMANAKA, AkioOKA, KenjiYOSHIDA, NorifumiHORIUCHI, Hiroshi
    • G09F13/20
    • G09F13/20C09K11/7744C09K11/7769C09K11/7787C30B13/24C30B29/16
    • A novel phosphorescent material is provided which has a narrow afterglow spectrum width, a choosable afterglow wavelength, a high moisture resistance, a high thermal resistance, and no optical anisotropy.
      It comprises a single crystal made of scandium oxide and a rare earth element substituting scandium of said single crystal, and generates the afterglow having a wavelength and spectrum width based on 4f-4f transition of the rare earth ion by irradiating ultraviolet light of the energy corresponding to the energy gap between 5d orbital of the rare earth ion and 2p orbital of oxygen of scandium oxide, or the energy gap between 4f excited orbital of the rare earth ion and 2p orbital of oxygen of scandium oxide. By choosing a rare earth element, the afterglow wavelength can be chosen. Since the host crystal is scandium oxide, it has the thermal resistance of 1000°C or higher. Since the crystal structure of scandium oxide is cubic, there is no double refraction.
    • 提供了具有窄的余辉光谱宽度,可选择的余辉波长,高耐湿性,高耐热性和无光学各向异性的新型磷光材料。 它包括由氧化钪制成的单晶和用所述单晶的钪取代的稀土元素,并且通过照射相应的能量的紫外光产生具有基于稀土离子的4f-4f跃迁的波长和光谱宽度的余辉 到稀土离子的5d轨道和氧化钪的2p轨道之间的能隙,或稀土离子的4f激发轨道和氧化钪氧2p轨道之间的能隙。 通过选择稀土元素,可以选择余辉波长。 由于主晶体是氧化钪,所以其热阻为1000℃以上。 由于氧化钪的晶体结构为立方体,因此不存在双重折射。