[0004] 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;
[0005] (iii) a second electrode;
[0006] (iv) an optional protective element 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
[0007] (v) a hole transport region situated between the anode and the region (ii), and wherein the hole transport region optionally includes a buffer layer; and
[0008] (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).
[0009] Illustrated in copending application U.S. Serial No. (not yet assigned—D/A1581), filed concurrently herewith, the disclosure of which is totally incorporated herein by reference, is an organic light emitting device comprising
[0010] (i) a first electrode;
[0012] wherein X is selected from the group consisting of an oxygen atom, a sulfur atom, an alkyl imino group and aryl imino group; Rx and R2 are individually selected from the group consisting of alkyl, aryl, and carbocyclic; R3 and R4 are individually selected from the group consisting of a hydrogen atom, alkyl, and optionally a branched or unbranched 5 or 6 member substituent ring connecting with Rt and R2, respectively; and R5, R6, R7, and R8 are individually selected from the group consisting of a hydrogen atom, an alkoxy group and an alkyl group;
[0013] (iii) a second electrode;
[0014] (iv) an optional thermal protective element coated on one of the first and second electrodes; wherein one of the first and second electrodes is a hole injecting anode, and one of the first and second electrodes is an electron injecting cathode, and wherein the organic light emitting device further comprises at least one of
[0015] (v) a hole transport region interposed or situated between the anode and the mixed region, wherein the hole transport region optionally includes a buffer layer; and
[0016] (vi) an electron transport region interposed between the cathode and the mixed region, and wherein said green emitting dye is present in an amount of from about 0.01 to about 10 weight percent based on the total of said mixed layer components (ii).
[0017] Illustrated in copending application U.S. Serial No. (not yet assigned—D/A1406), filed concurrently herewith, the disclosure of which is totally incorporated herein by reference, is an organic light emitting device comprising
[0018] (i) an anode;
[0019] (ii) a hole transport layer comprising a mixture of a porphyrin and a hole transport material;
[0020] (iii) a mixed region comprising a mixture of (1) a hole transport material, and (2) an electron transport material, and which mixed region optionally contains an organic luminescent material;
[0021] (iv) a cathode; and wherein the organic light emitting device optionally further comprises at least one of
[0022] (v) an electron transport region interposed between the mixed region and the cathode; and
[0023] (vi) an optional thermal protective element coated on one of the anode and cathode.
