Organic electroluminescent materials and devices

An organic light emitting device, comprising:

• an anode;
• a cathode;
• and
• an organic layer, disposed between the anode and the cathode, the organic layer further comprising a compound having
• wherein:
• ring B and ring C are each phenyl;
• A-B represents a bonded pair of carbocyclic or heterocyclic rings coordinated to a metal M via a nitrogen atom in ring A and an sp2 hybridized atom in ring B;
• A-C represents a bonded pair of carbocyclic or heterocyclic rings;
• Rb and Rc each represents mono, di, tri, or tetra substitutions;
• Rb and Rc are independently selected from the group consisting of hydrogen, alkyl, alkoxy, amino, alkenyl, alkynyl, arylkyl, aryl, and heteroaryl;
• X1, X2, X3, X4, X5, X6, X7, X8, and X9 are carbon;
• R1 and R2 are independently selected from the group consisting of hydrogen, alkyl, alkoxy, amino, alkenyl, alkynyl, arylkyl, aryl, and heteroaryl;
• at least one of R1, R2, R3, and R4 are not hydrogen;
• R3, R4, and R5 are selected from the group consisting of hydrogen, alkyl, alkoxy, amino, alkenyl, alkynyl, arylkyl, aryl, and heteroaryl;
• M is Ir;
• L′ is a monoanionic bidentate ligand;
• m is 3;
• and
• n is at least 1.

A consumer product comprising a device, the device further comprising:

• an anode;
• a cathode;
• and
• an organic layer, disposed between the anode and the cathode, the organic layer further comprising a compound having
• wherein:
• ring B and ring C are each phenyl;
• A-B represents a bonded pair of carbocyclic or heterocyclic rings coordinated to a metal M via a nitrogen atom in ring A and an sp2 hybridized atom in ring B;
• A-C represents a bonded pair of carbocyclic or heterocyclic rings;
• Rb and Rc each represents mono, di, tri, or tetra substitutions;
• Rb and Rc are independently selected from the group consisting of hydrogen, alkyl, alkoxy, amino, alkenyl, alkynyl, arylkyl, aryl, and heteroaryl;
• X1, X2, X3, X4, X5, X6, X7, X8, and X9 are carbon;
• R1 and R2 are independently selected from the group consisting of hydrogen, alkyl, alkoxy, amino, alkenyl, alkynyl, arylkyl, aryl, and heteroaryl;
• at least one of R1, R2, R3, and R4 are not hydrogen;
• R3, R4, and R5 are selected from the group consisting of hydrogen, alkyl, alkoxy, amino, alkenyl, alkynyl, arylkyl, aryl, and heteroaryl;
• M is Ir;
• L′ is a monoanionic bidentate ligand;
• m is 3;
• and
• n is at least 1.