Provided is an organic electroluminescent device which is suitable for use in full-color and multicolor panels and shows higher luminous efficiency and better driving stability than organic electroluminescent devices utilizing luminescence from the singlet state. The organic electroluminescent device comprises a substrate 1 and an anode 2, organic layers, and a cathode 8 piled one upon another on the substrate, at least one of the organic layers comprises a light-emitting layer 5 containing a host material and a dopant material, and a compound having 2 to 4 pyrazole structures represented by the following formula I (wherein Ar4 to Ar6 are independently hydrogen or substituted or unsubstituted aromatic hydrocarbon groups or aromatic heterocyclic groups) is used as said host material.
提供的是一种有机电致发光器件,适用于全彩和多彩面板,并且显示比利用单态发光的有机电致发光器件更高的发光效率和更好的驱动稳定性。该有机电致发光器件包括基板1和阳极2,有机层和堆叠在基板上的阴极8,其中至少一个有机层包括一个发光层5,该发光层包含一个主体材料和一个掺杂材料,并且使用具有2到4个
吡唑结构的化合物作为所述主体材料,所述化合物由以下式I表示(其中Ar4到Ar6独立地表示
氢或取代或未取代的
芳香烃基或芳香杂环基)。