申请人:Konica Minolta Holdings, Inc.
公开号:EP2460866A2
公开(公告)日:2012-06-06
Provided is an organic electroluminescent element comprising a substrate having thereon an anode, a cathode, and a plurality of organic layers sandwiched between the anode and the cathode,
wherein the plurality of organic layers comprise:
a light emitting layer containing a phosphorescence emitting compound; and
an electron transport layer containing a compound represented by Formula (1),
Formula (1) (Ar1)n1-Y1
wherein n1 is an integer of 1 or more; Y1 is a substituent when n1 is 1, and Y1 is a single bond or a linking group of n1 valences when n1 is two or more; Ar1 is a group represented by Formula (A), a plurality of Ar1 may be the same or different with each other when n1 is two or more; and the compound represented by Formula (1) contains at least two condensed aromatic heterocyclic rings each comprising 3 or more rings condensed with each other:
本发明提供了一种有机电致发光元件,该元件包括基底,基底上有阳极、阴极以及夹在阳极和阴极之间的多个有机层、
其中多个有机层包括
发光层,包含磷光发光化合物;以及
电子传输层,含有一种由式(1)表示的化合物、
式 (1) (Ar1)n1-Y1
其中,n1 是 1 或 1 以上的整数;当 n1 为 1 时,Y1 是取代基,当 n1 为 2 或 2 以上时,Y1 是单键或 n1 价的连接基团;Ar1 是由式(A)表示的基团,当 n1 为 2 或 2 以上时,多个 Ar1 可以彼此相同或不同;式(1)表示的化合物包含至少两个缩合芳香杂环,每个芳香杂环由 3 个或 3 个以上彼此缩合的环组成: