Patent ID: 7675228

Claim:
An electronic device comprising at least one layer comprising a compound having Formula I: wherein: R 1 , R 2 , R 3 and R 4 are independently selected from the group consisting of H, F, alkyl, aryl, fluoroalkyl, fluoroaryl, and E(R 9 ) 3 groups wherein E is Si, Ge, or Sn, wherein at least one of R 1 , R 2 , R 3 , R 4 , R 5 , R 6 , R 7 and R 8 is E(R 9 ) 3 ; any two adjacent members of R 1 , R 2 , R 3 , and R 4 may be taken together to form 5- or 6-membered rings; and R 9 is an alkyl or aryl group or E(alkyl) 3 , E(alkyl) 2 (aryl), E(alkyl)(aryl) 2 or E(aryl) 3 ; L′=a β-enolate ligand of Formula III wherein R 10 is the same or different at each occurrence and is selected from the group consisting of substituted or unsubstituted alkyl, substituted or unsubstituted aryl, substituted or unsubstituted alkylaryl and substituted or unsubstituted heterocyclic groups; and R 11 is selected from the group consisting of H, F, substituted or unsubstituted alkyl, substituted or unsubstituted aryl, substituted or unsubstituted alkylaryl, and substituted or unsubstituted heterocyclic groups; or adjacent R 10 and R 11 groups are joined to form five- or six-membered rings; L″=a monodentate ligand selected from the group consisting of hydride, CO, nitriles, isonitriles, olefins, acetylenes, phosphines, arsines, amines, and halides; m=1, 2 or 3; y=1 or 2, and z=0, 2 or 4, wherein the compound is charge-neutral and the iridium is hexacoordinate.