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.