Organic electroluminescent materials and devices

An organic light emitting device (OLED) comprising:

• an anode;
• a cathode;
• and
• an organic layer disposed between the anode and the cathode, wherein the organic layer comprises a compound comprising a first bidentate ligand LA;
• wherein LA comprises a structure of Formula I,
• LA is coordinated to a metal M;
• LA may be joined with other ligands to comprise a tridentate, tetradentate, pentadentate, and hexadentate ligand;
• wherein the metal M is selected from the group consisting of Os, Ir, Pd, Pt, Cu, Ag, and Au;
• wherein ring 1 is not directly coordinated to the M;
• R3 represents mono, up to maximum allowed substitutions, or no substitutions;
• each of X1, X2, X3, and X4 is independently C or N;
• wherein two R1, R2, and R3 can be joined or fused to form a ring;
• and
• wherein each R1, R2, and R3 is independently a group containing the metal M, a hydrogen, or a substituent selected from the group consisting of deuterium, halogen, alkyl, cycloalkyl, heteroalkyl, heterocycloalkyl, boryl, germyl, arylalkyl, alkoxy, aryloxy, amino, silyl, alkenyl, cycloalkenyl, heteroalkenyl, alkynyl, aryl, heteroaryl, acyl, carboxylic acid, ether, ester, nitrile, isonitrile, sulfanyl, sulfinyl, sulfonyl, phosphino, selenyl, and combinations thereof,
• with the provisos that:
• when R3 at X1 and X2 are fused together to form a ring, and when R3 at X3 and X4 are fused together to form a ring, said rings are not both joined to the metal M forming a 5-membered chelate ring.

A consumer product comprising an organic light-emitting device (OLED) comprising:

• an anode;
• a cathode;
• and
• an organic layer disposed between the anode and the cathode, wherein the organic layer comprises a compound comprising a first bidentate ligand LA;
• wherein LA comprises a structure of Formula I,
• LA is coordinated to a metal M;
• LA may be joined with other ligands to comprise a tridentate, tetradentate, pentadentate, and hexadentate ligand;
• wherein the metal M is selected from the group consisting of Os, Ir, Pd, Pt, Cu, Ag, and Au;
• wherein ring 1 is not directly coordinated to the M;
• R3 represents mono, up to maximum allowed substitutions, or no substitutions;
• each of X1, X2, X3, and X4 is independently C or N;
• wherein two R1, R2, and R3 can be joined or fused to form a ring;
• and
• wherein each R1, R2, and R3 is independently a group containing the metal M, a hydrogen, or a substituent selected from the group consisting of deuterium, halogen, alkyl, cycloalkyl, heteroalkyl, heterocycloalkyl, boryl, germyl, arylalkyl, alkoxy, aryloxy, amino, silyl, alkenyl, cycloalkenyl, heteroalkenyl, alkynyl, aryl, heteroaryl, acyl, carboxylic acid, ether, ester, nitrile, isonitrile, sulfanyl, sulfinyl, sulfonyl, phosphino, selenyl, and combinations thereof,
• with the provisos that:
• when R3 at X1 and X2 are fused together to form a ring, and when R3 at X3 and X4 are fused together to form a ring, said rings are not both joined to the metal M forming a 5-membered chelate ring.