Patent ID: 6322908
Filing Date: 2001-11-27
Classification: C07D,H01L,Y10S

Abstract:
An organic electroluminescent device comprising an anode, a cathode and, between said anode and cathode, one or more organic thin-film layers including a light emitting layer, wherein at least one of said organic thin-film layers contains a material represented by the formula (I): ##STR46##wherein R.sup.1 to R .sup.4 each independently represents a hydrogen atom, a halogen atom, an amino group, a hydroxyl group, a cyano group, a nitro group, a substituted or unsubstituted alkyl group, a substituted or unsubstituted cycloalkyl group, a substituted or unsubstituted alkoxy group, a substituted or unsubstituted aromatic hydrocarbon group, a substituted or unsubstituted aromatic heterocyclic group, a substituted or unsubstituted aralkyl group, or a substituted or unsubstituted aryloxy group; or R.sup.1 to R .sup.4 may be coupled together to form a ring,wherein said organic thin-film layers further comprise at least one hole transport layer and said hole transport layer contains the compound of the formula (I) either singly or as a mixture.