Patent ID: 6524728
Filing Date: 2003-02-25
Classification: C09B,H01L,Y10S,Y10T

Abstract:
An organic electroluminescent device of the type which comprises a multilaminated structure made of an organic compound including an emission region made of an organic compound, wherein a portion contacting the emission region contains a bathophenanthroline derivative of the formula:Formula: wherein X and Y may be the same or different and independently represent a hydrogen atom except the case where a hydrogen atom is at the 2 and 9 position, a substituted or unsubstituted alkyl group except the case where a methyl group is at the 2 and 9 position, a substituted or unsubstituted cycloalkyl group, a substituted or unsubstituted aryl group, a substituted or unsubstituted amino group, a halogen atom, a nitro group, a cyano group or a hydroxyl group provided that at least one of these groups is contained at a preselected position;wherein emission is obtained through re-combination of electrons and holes in a hole transport organic material and wherein in order to cause the re-combination in a hole transport layer consisting of at least one organic hole transporting luminescent layer, there is provided a hole-blocking layer containing the bathophenanthroline derivative; and wherein the hole-blocking layer is provided between the hole transport layer and an electron transport layer in the multilaminated structure.