Organic electroluminescent materials and devices

A first device comprising an organic light emitting device, further comprising:

• an anode;
• a cathode;
• and
• an organic layer, disposed between the anode and the cathode, wherein the organic layer further comprises a compound comprising a tetradentate ligand L having the formula:
• wherein A is a 5-membered or 6-membered carbocyclic or heterocyclic ring;
• wherein R2 and RA may represent mono, di, tri or tetra substitutions;
• wherein each of R1, R2 and RA is independently selected from the group consisting of hydrogen, deuterium, halide, alkyl, cycloalkyl, heteroalkyl, arylalkyl, alkoxy, aryloxy, amino, silyl, alkenyl, cycloalkenyl, heteroalkenyl, alkynyl, aryl, heteroaryl, acyl, carbonyl, carboxylic acids, ester, nitrile, isonitrile, sulfanyl, sulfinyl, sulfonyl, phosphino, and combinations thereof;
• wherein two adjacent substituents of R2 and RA are optionally joined to form a fused ring;
• wherein each of X1, X2, X3 and X4 are independently selected from the group consisting of C and N;
• wherein at least two of X1, X2, X3 and X4 are N;
• wherein the ligand L is coordinated to a Pt atom;
• and
• wherein the dashed lines represent bonds with the Pt atom.

A consumer product comprising an organic light emitting device, comprising:

• an anode;
• a cathode;
• and
• an organic layer, disposed between the anode and the cathode, wherein the organic layer further comprises a compound comprising a tetradentate ligand L having the formula:
• wherein A is a 5-membered or 6-membered carbocyclic or heterocyclic ring;
• wherein R2 and RA may represent mono, di, tri or tetra substitutions;
• wherein each of R1, R2 and RA is independently selected from the group consisting of hydrogen, deuterium, halide, alkyl, cycloalkyl, heteroalkyl, arylalkyl, alkoxy, aryloxy, amino, silyl, alkenyl, cycloalkenyl, heteroalkenyl, alkynyl, aryl, heteroaryl, acyl, carbonyl, carboxylic acids, ester, nitrile, isonitrile, sulfanyl, sulfinyl, sulfonyl, phosphino, and combinations thereof;
• wherein two adjacent substituents of R2 and RA are optionally joined to form a fused ring;
• wherein each of X1, X2, X3 and X4 are independently selected from the group consisting of C and N;
• wherein at least two of X1, X2, X3 and X4 are N;
• wherein the ligand L is coordinated to a Pt atom;
• and
• wherein the dashed lines represent bonds with the Pt atom.