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    • 3. 发明申请
    • MULTICOLOR PHOSPHORESCENT ORGANIC ELECTROLUMINESCENT ELEMENT AND LIGHTING SYSTEM
    • 多晶硅有机电致发光元件和照明系统
    • US20100026175A1
    • 2010-02-04
    • US12519075
    • 2007-11-13
    • Tomoyuki NakayamaHiroshi KashiwagiYoriko NakayamaShigeru Kojima
    • Tomoyuki NakayamaHiroshi KashiwagiYoriko NakayamaShigeru Kojima
    • H01J1/63
    • C09K11/06C09K2211/1007C09K2211/1014C09K2211/1029C09K2211/1044C09K2211/1048C09K2211/1059C09K2211/185H01L51/0059H01L51/0071H01L51/0072H01L51/0073H01L51/0085H01L51/5036H05B33/14
    • This invention provides a multicolor phosphorescent organic electroluminescent element having an excellent electric power efficiency, a prolonged service life, an excellent storage stability, and an excellent stability of chromaticity against drive current, and a lighting system using the multicolor phosphorescent organic electroluminescent element. The multicolor phosphorescent organic electroluminescent element contains a plurality of phosphorescent dopants different from each other in luminescence wavelength and particularly exhibits white luminescence. Specifically, the multicolor phosphorescent organic electroluminescent element contains two or more phosphorescent dopants different from each other in luminescence wavelength and comprises two or more luminescent layers, the luminescent dopant being a phosphorescent dopant. The multicolor phosphorescent organic electroluminescent element is characterized in that at least one layer formed of luminescent layer A containing two or more phosphorescent dopants different from each other in luminescence wavelength in the same layer is provided, the content of the luminescent dopant having the highest concentration used in the luminescent layer A is not less than 4% by mass and not more than 20% by mass, and luminescent layer B having a maximum luminescence wavelength of not more than 480 nm is provided at a position near the cathode side as compared with the luminescent layer A.
    • 本发明提供一种多色磷光有机电致发光元件,其具有优异的电力效率,延长的使用寿命,优异的储存稳定性和优异的色温对驱动电流的稳定性,以及使用该多色磷光有机电致发光元件的照明系统。 多色磷光有机电致发光元件在发光波长中含有彼此不同的多个磷光掺杂剂,特别是显示白色发光。 具体地,多色磷光有机电致发光元件在发光波长中含有彼此不同的两种或更多种磷光掺杂剂,并且包含两个或更多个发光层,发光掺杂剂是磷光掺杂剂。 多色磷光有机电致发光元件的特征在于,在同一层中,由发光层A形成的至少一层由发光波长彼此不同的两种以上的磷光掺杂剂构成,使用浓度最高的发光掺杂剂的含量 在发光层A中,不少于4质量%且20质量%以下,与阴极侧相比,在阴极侧附近的位置设置有最大发光波长为480nm以下的发光层B 发光层A.