Patent ID: 8580394

Claim:
A phosphorescent complex comprising a carbene ligand coordinate a three coordinate copper atom, wherein the phosphorescent complex has the formula: wherein *C is a divalent carbon atom coordinated to monovalent copper atom Cu: wherein X 1 and X 2 are substituents independently selected from alkyl, amine, phosphine, heteroalkyl, aryl and heteroaryl; wherein X 1 and X 2 may be further substituted; wherein X 1 and X 2 are optionally linked to form a cycle; wherein Y 1 and Y 2 are substituents that are independently selected from the group consisting of alkyl, heteroalky, aryl and heteroaryl; wherein Y 1 and Y 2 may be further substituted; wherein each of Y 1 and Y 2 form a bond with Cu; wherein Y 1 -Y 2 represent a bidentate ligand or two mondentate ligands (Y 1 and Y 2 ); wherein a first bond is formed between Cu and an atom Y′ 1 in substituent Y 1 and a second bond is formed between Cu and an atom Y′ 2 in substituent Y 2 ; wherein (i) Y′ 1 is N and Y′ 2 is selected from the group consisting of N, C, P, O, S and Se, (ii) Y′ 1 is C and Y′ 2 is selected from the group consisting of C, P, and O, or (iii) Y′ 1 and Y′ 2 are P; and wherein the carbene ligand is monodentate.