Electroluminescent iridium compounds with fluorinated phenylpyridine ligands, and devices made with such compounds

An organic electronic device comprising at least one layer comprising a composition of Formula I

• wherein:
• R1=H, F, or CnF2n+1;
• R2=H, or CnF2n+1;
• R3=NO2, Me (methyl) or NR2;
• R=is the same or different at each occurrence and is alkyl, aryl, or adjacent R groups are alkylene or substituted alkylene and can join together to form a 5- or 6-membered ring;
• L′=a bidentate ligand and is not a phenylpyridine, phenylpyrimidine, or phenylquinoline;
• L″=a monodentate ligand, and is not a phenylpyridine, phenylpyrimidine, or phenylquinoline;
• m=1 or 2;
• y=1 or 2;
• z=0 or 2;
• and
• n is an integer from 1 through 20,
• with the proviso that the composition is charge neutral and the iridium is hexacoordinate;
• and wherein at least one L′ is a phosphino alkoxide ligand of Formula IV:
• where
• R7 can be the same or different at each occurrence and is selected from H and Cn(H+F)2n+1;
• R8 can be the same or different at each occurrence and is selected from the group of Cn(H+F)2n+1, C6(H+F)5, C6H5−n(R9)n, and (CH2)nC(Cn(H+F)2n+1)2OH;
• R9=CF3, C2F5, n-C3F7, i-C3F7, C4F9, or CF3SO2;
• and
• q is 2 or 3
• or
• L′ is selected from the group of ligands having structure according to Formula V:
• Ar[—(CH2)r—Y]p Formula V
• wherein
• Ar is phenyl;
• Y is P(Ar)2;
• r is 0 or an integer from 1 through 20;
• p is 1 or 2, wherein the carbon in one or more of the (CH2) can be replaced with a heteroatom and one or more of the hydrogens in one or more of the (CH2) can be replaced with D or F
• and wherein if m=2, then each occurrence of
• can be the same or different.