申请人:Yoshitake Osamu
公开号:US20080093984A1
公开(公告)日:2008-04-24
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 Ar
4
to Ar
6
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,并且显示比利用单重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在基板1和阳极2上堆叠的有机层和阴极8,至少其中一个有机层包括包含主体材料和掺杂材料的发光层5,以及使用具有2至4个吡唑结构的化合物作为所述主体材料的化合物,所述化合物由以下公式I表示(其中Ar4至Ar6分别为氢或取代或未取代的芳香烃基或芳香杂环基)。