Patent ID: 8492006

Claim:
A compound having the formula M(L) x (L 1 ) y (L 2 ) z : wherein the ligand L is wherein the ligand L 1 is wherein the ligand L 2 is an ancillary ligand; wherein each L, L 1 and L 2 can be the same or different; wherein M is a metal having an atomic number greater than 40; wherein x is 1, 2, or 3; wherein y is 0, 1, or 2; wherein z is 0, 1, or 2; wherein x+y+z is the oxidation state of the metal M; wherein R is a fused carbocyclic or heterocyclic ring further substituted with a substituent containing Ge; wherein A, B, and C are each independently a 5 or 6-membered carbocyclic or heterocyclic ring; wherein R A , R B , and R C may represent mono, di, tri, or tetra substitutions; wherein each of R A , R B , and R C 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; wherein adjacent substitutents of R A , R B , and R C are optionally joined to form a fused ring; and wherein the ligand L is bidentately coordinated to the metal M.