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Pub. No.:    WO/2010/119891    International Application No.:    PCT/JP2010/056672
Publication Date: Fri Oct 22 01:59:59 CEST 2010 International Filing Date: Thu Apr 15 01:59:59 CEST 2010
IPC: H01L 51/50
C08G 61/12
H05B 33/10
Applicants: Konica Minolta Holdings, Inc.
MUROTA Kazutoshi
室田 和敏
IWASAKI Toshihiko
岩崎 利彦
Inventors: MUROTA Kazutoshi
室田 和敏
IWASAKI Toshihiko
岩崎 利彦
Disclosed is an organic electroluminescent element which can be produced by a wet process, has improved laminated structure, and also has improved external quantum efficiency and an improved service life. The organic electroluminescent element comprises at least an anode, a cathode and a laminated structure intercalated between the anode and the cathode, all of which are arranged on a substrate, wherein the laminated structure has at least four layers formed by a wet process, and wherein the layers produced by the wet process include at least a hole injection layer, a hole transport layer and a light-emitting layer. The organic electroluminescent element is characterized in that the hole injection layer comprises an electrically conductive polymer, the hole transport layer comprises a polymeric compound having a repeating unit represented by general formula (1), and the polymeric compound has a weight average molecular weight of 50,000 to 200,000 in terms of polystyrene content.