申请人:FUJIFILM Corporation
公开号:EP2461390A1
公开(公告)日:2012-06-06
Provided is an organic electroluminescence device that can be driven at a low voltage, and has a high efficiency, excellent durability and a small change in chromaticity when driving at a high temperature. The organic electroluminescence device has a pair of electrodes disposed on a substrate and at least one organic layer including a light emitting layer disposed between the electrodes. The organic electroluminescence device contains a compound represented by the following Formula (1) in any one layer of the organic layers and a phosphorescence emitting material represented by the following Formula (C-1) in the light emitting layer.
(Cz)p-L-(A)q (1)
In Formula (1), Cz is a substituted or unsubstituted arylcarbazolyl group or a carbazolylaryl group, L is a single bond or a substituted or unsubstituted arylene group, a substituted or unsubstituted cycloalkylene group, or a substituted or unsubstituted aromatic heterocyclic ring, A is a substituted or unsubstituted nitrogen-containing six-membered aromatic heterocyclic ring, and each of p and q is independently an integer of 1 to 6.
In Formula (C-1), each of Q1, Q2, Q3 and Q4 independently represents a ligand which is coordinated to Pt. Each of L1, L2 and L3 independently represents a single bond or a divalent linking group.
本发明提供了一种有机电致发光器件,它可以在低电压下驱动,并且效率高、耐用性好,在高温下驱动时色度变化小。该有机电致发光器件具有一对设置在基板上的电极和至少一个设置在电极之间的包括发光层在内的有机层。有机电致发光器件在有机层的任意一层中含有下式(1)代表的化合物,在发光层中含有下式(C-1)代表的磷光发光材料。
(Cz)p-L-(A)q (1)
在式 (1) 中,Cz 是取代或未取代的芳基咔唑基团或咔唑芳基,L 是单键或取代或未取代的芳烯基团、取代或未取代的环亚烷基或取代或未取代的芳香杂环,A 是取代或未取代的含氮六元芳香杂环,p 和 q 中的每一个独立地为 1 至 6 的整数。
在式(C-1)中,Q1、Q2、Q3 和 Q4 各自独立地代表与铂配位的配体,L1、L2 和 L3 各自独立地代表单键或二价连接基团。