Patent ID: 6737177
Filing Date: 2004-05-18
Classification: C09K,H01L,Y10S,Y10T

Abstract:
An organic light emitting device comprising(i) a first electrode; (ii) a region comprising a mixture of (1) a tertiary aromatic amine, (2) a metal oxinoid, and (3) a red emitting material represented by wherein X is a carbon C atom or a nitrogen N atom or optionally oxygen or sulfur; R1, R2 and R3 are each independently selected from the group consisting of hydrogen, alkyl, substituted alkyl, aryl, and substituted aryl; M is a divalent, trivalent or tetravalent metal;(iii) a second electrode; (iv) a protective element selected from the group consisting of silicon dioxide, silicon oxide, and mixtures thereof coated on at least one of the first and second electrodes, wherein one of said first and second electrodes is a hole injection anode, and one of said electrodes is an electron injection cathode; and at least one of (v) a hole transport region situated between the anode and the region (ii), and wherein the hole transport region comprises a layer comprised of a mixture of (i) from about 25 weight percent to about 99 weight percent of a porphyrin, and (ii) from about 75 weight percent to about 1 weight cement of an aromatic tertiary amine or an indolocarbazole and optionally includes a buffer layer; and (vi) an electron transport region situated between the cathode and the region (ii), and wherein said red emitting component is present in an amount of from 1 to about 40 weight percent based on total weights of components in region (II).