ORGANIC ELECTROLUMINESCENT ELEMENT AND NOVEL ALCOHOL-SOLUBLE PHOSPHORESCENT MATERIAL
申请人:Noto Mitsuharu
公开号:US20120261651A1
公开(公告)日:2012-10-18
Object of the present invention is to provide an organic electroluminescent element having an emissive layer that may be formed by wet process in the fabrication of the organic electroluminescence device with multi-layer structure and has excellent electron-injection property, electron-transfer property, durability and luminescent efficiency and a novel alcohol-soluble organic phosphorescent material that may be preferably applicable to the fabrication of the same. An organic electroluminescent element
1
has a plurality of laminated organic layers
4, 5, 6
sandwiched between anode
3
and cathode
7
. A hole transport layer
5
composed of organic compounds insoluble in alcohol solvent and an emissive layer
6
formed by a wet process so that it contacts with the hole transport layer
5
on the side facing with the cathode
7
contains host materials consisting of one or more phosphine oxide derivatives soluble in alcohol solvent and guest materials soluble in alcohol solvent which can be excited electrically to emit light.
本发明的目的是提供一种有发射层的有机电致发光元件,该发射层可以通过湿法工艺在具有多层结构的有机电致发光器件的制造中形成,并具有优异的电子注入性能、电子传输性能、耐久性和发光效率,以及一种新型的醇溶性有机磷光材料,可以优选地应用于相同的制造中。有机电致发光元件具有多层有机层,位于阳极和阴极之间。由不溶于醇溶剂的有机化合物组成的空穴传输层和通过湿法工艺形成的发射层,使其与空穴传输层接触,朝向阴极的一侧含有由一种或多种可溶于醇溶剂的膦氧化物衍生物组成的主体材料和可溶于醇溶剂的客体材料,这些客体材料可以在电激发下发光。