Patent ID: 6821643
Filing Date: 2004-11-23
Classification: C09K,H01L,H05B,Y10S

Abstract:
An electroluminescent device comprised of an anode and a cathode, a buffer layer adjacent said anode and including phthalocyanine or derivatives thereof, a tertiary aromatic amine, a polyaniline, or a polythiophene, and situated therebetween said anode and said cathode at least one electron transport layer comprised of a triazine of the formula wherein A is a monovalent or a multivalent aromatic group which contains at least two conjugate-linked or at least two fused aromatic rings; Ar1 and Ar2 are each independently aryl or aliphatic; and m represents the number of repeating segments and further containing a light emitting layer situated between a hole transport layer and the electron transport layer wherein the light emitting layer contains a fluorescent dye selected from the group consisting of coumarins, quinacridones, and aromatic hydrocarbon fluorescent dyes and wherein said fluorescent dye is present in an amount of from about 10âˆ’3 to about 10 mole percent based on the moles of the light emitting material of said light emitting layer.