Phosphorescent compound with fused rng substitution

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

• an anode:
• a cathode:
• and
• an organic layer, disposed between the anode and the cathode, comprising a compound comprising a ligand L having the structure:
• wherein B is a 5 or 6-membered carbocyclic or heterocyclic ring;
• wherein C is a condensed aromatic ring system having at least two carbocyclic or heterocyclic rings;
• wherein 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 X6 in ring B;
• wherein A-C represents a bonded pair of carbocyclic or heterocyclic rings;
• wherein RA may represent mono, di, or tri substitutions, or no substitution;
• wherein RB may represent any number of substitution from mono to up to the maximum possible number of substitution on ring B, or no substitution;
• wherein RC may represent any number of substitution from mono to up to the maximum possible number of substitution on ring C, or no substitution;
• wherein RA, RB, and RC are independently selected from the group consisting of hydrogen, deuterium, halide, alkyl, cycloalkyl, heteroalkyl, aralkyl, 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 X1, X2, X3, X4, X5, and X6 are independently selected from carbon and nitrogen;
• wherein X7 is carbon;
• wherein at least one of RA and RC substituents adjacent to the bond between A and C is not hydrogen;
• and
• wherein the ligand L is coordinated to the metal M having an atomic number greater than 40.