Disclosed is an organic electroluminescent device having excellent power efficiency wherein white balance can be easily controlled. Also disclosed are a liquid crystal display and an illuminating device respectively using such an organic electroluminescent device. Specifically disclosed is an organic electroluminescent device having three or more light-emitting layers of different emission wavelengths, while containing a phosphorescent dopant having an emission maximum wavelength of 440-490 nm in a solid state in at least one of the light-emitting layers. This organic electroluminescent device is characterized in that the ionization potential energy of the phosphorescent dopant is lower than 5.1 eV and than the ionization potential energy of at least one other light-emitting dopant.
本发明公开了一种有机电致发光器件,该器件具有极佳的能效,且白平衡易于控制。还公开了分别使用这种有机电致发光器件的液晶显示器和照明设备。具体而言,本发明公开了一种有机电致发光器件,该器件具有三个或三个以上不同发射波长的发光层,同时在至少一个发光层中含有固态
磷光掺杂剂,其最大发射波长为 440-490 纳米。这种有机电致发光器件的特点是,
磷光掺杂剂的电离势能低于 5.1 eV,也低于至少另一种发光掺杂剂的电离势能。