A compound having a formula Ir(L A)(L B)(L C), Ir(L A)(L B) 2, or Ir(L A) 2 (L B): wherein the ligand L A is the ligand L B is selected from the group consisting of: and the ligand L C is wherein L A is different from L B, and each plurality of L A and L B are also different; wherein rings A and B are each independently a 5 or 6-membered carbocyclic or heterocyclic ring; wherein R A and R B each independently represent mono substitution up to the maximum possible number of substitutions, or no substitution; wherein Z 1 and Z 2 are each independently selected from the group consisting of carbon or nitrogen; wherein each X 1 to X 8 are independently selected from the group consisting of carbon and nitrogen; wherein X is selected from the group consisting of BR', NR', PR', O, S, Se, C=O, S=O, SO 2, CR'R", SiR'R", and GeR'R"; wherein R' and R" are optionally fused or joined to form a ring; wherein each R a, R b, R c, and R d may represent from mono substitution up to the maximum possible number of substitutions, or no substitution; wherein R', R", R a, R b, R c, and R d are each 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; and wherein any two adjacent substituents of R a, R b, R c, and R d are optionally fused or joined to form a ring or form a multidentate ligand; wherein each of R A, R B, R X, R Y, and R Z are 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; and wherein any adjacent substituents are optionally joined or fused into a ring. wherein the ligand L A is the ligand L B is selected from the group consisting of: and the ligand L C is wherein L A is different from L B, and each plurality of L A and L B are also different; wherein rings A and B are each independently a 5 or 6-membered carbocyclic or heterocyclic ring; wherein R A and R B each independently represent mono substitution up to the maximum possible number of substitutions, or no substitution; wherein Z 1 and Z 2 are each independently selected from the group consisting of carbon or nitrogen; wherein each X 1 to X 8 are independently selected from the group consisting of carbon and nitrogen; wherein X is selected from the group consisting of BR', NR', PR', O, S, Se, C=O, S=O, SO 2, CR'R", SiR'R", and GeR'R"; wherein R' and R" are optionally fused or joined to form a ring; wherein each R a, R b, R c, and R d may represent from mono substitution up to the maximum possible number of substitutions, or no substitution; wherein R', R", R a, R b, R c, and R d are each 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; and wherein any two adjacent substituents of R a, R b, R c, and R d are optionally fused or joined to form a ring or form a multidentate ligand; wherein each of R A, R B, R X, R Y, and R Z are 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; and wherein any adjacent substituents are optionally joined or fused into a ring.