Organic electroluminescent materials and devices

An organic light emitting device (OLED) comprising:

• an anode;
• a cathode;
• and
• an organic layer, disposed between the anode and the cathode, comprising a compound of (LA)3-nIr(LB)n of Formula I
• wherein n=0, 1, or 2;
• wherein Z1 to Z16 are each independently C or N;
• wherein any of Z13 to Z16 is C when it forms a bond with Ir, or when it forms a bond with the ring having R1;
• wherein any chelate ring comprising Ir is a 5-membered ring;
• wherein R1 to R6 each independently represents mono to the maximum allowable substitution, or no substitution;
• wherein each R1 to R6 is independently hydrogen or a substituent selected from the group consisting of deuterium, fluorine, alkyl, cycloalkyl, heteroalkyl, alkoxy, aryloxy, amino, alkenyl, cycloalkenyl, heteroalkenyl, aryl, heteroaryl, nitrile, isonitrile, sulfanyl, and combinations thereof;
• wherein any two substituents may be joined or fused together to form a ring;
• and
• wherein at least one of R1 and R2 is an alkyl or cycloalkyl group comprising five or more C atoms;
• wherein at least one of the following is true:
• i) at least one R1 or R2 is fully or partially deuterated;
• or
• ii) n=2;
• and
• wherein one of the following is true:
• A) the ring having R1 bonds to Z14 and one of the following is true:
• I) Z7 is N;
• or
• II) Z5 and Z8 are N;
• B) the ring having R1 bonds to Z15 and one of the following is true:
• 1) Z10 is N;
• or
• 2) Z9 and Z12 are N;
• or
• C) Z5 to Z16 are each C and if at least one of R1 and R2 is cycloalkyl comprising five or more C atoms, said cycloalkyl is not adamantyl and at least one of the following is true for said cycloalkyl:
• a) said cycloalkyl is partially deuterated;
• or
• b) said cycloalkyl has the structure selected from the group of
• or
• D) Z5 to Z16 are each C and at least one R1 or R2 comprises an alkyl group that is fully or partially deuterated and said alkyl group comprises a cycloalkyl substituent group that is nondeuterated.

A consumer product comprising an organic light-emitting device (OLED) comprising:

• an anode;
• a cathode;
• and
• an organic layer, disposed between the anode and the cathode, comprising a compound of (LA)3-nIr(LB)n of Formula I
• wherein n=0, 1, or 2;
• wherein Z1 to Z16 are each independently C or N;
• wherein any of Z13 to Z16 is C when it forms a bond with Ir, or when it forms a bond with the ring having R1;
• wherein any chelate ring comprising Ir is a 5-membered ring;
• wherein R1 to R6 each independently represents mono to the maximum allowable substitution, or no substitution;
• wherein each R1 to R6 is independently hydrogen or a substituent selected from the group consisting of deuterium, fluorine, alkyl, cycloalkyl, heteroalkyl, alkoxy, aryloxy, amino, alkenyl, cycloalkenyl, heteroalkenyl, aryl, heteroaryl, nitrile, isonitrile, sulfanyl, and combinations thereof;
• wherein any two substituents may be joined or fused together to form a ring;
• and
• wherein at least one of R1 and R2 is an alkyl or cycloalkyl group comprising five or more C atoms;
• wherein at least one of the following is true:
• i) at least one R1 or R2 is fully or partially deuterated;
• or
• ii) n=2;
• and
• wherein one of the following is true:
• A) the ring having R1 bonds to Z14 and one of the following is true:
• I Z7 is N;
• or
• II) Z5 and Z8 are N;
• B) the ring having R1 bonds to Z15 and one of the following is true:
• 1) Z10 is N;
• or
• 2) Z9 and Z12 are N;
• or
• C) Z5 to Z16 are each C and if at least one of R1 and R2 is cycloalkyl comprising five or more C atoms, said cycloalkyl is not adamantyl and at least one of the following is true for said cycloalkyl:
• a) said cycloalkyl is partially deuterated;
• or
• b) said cycloalkyl has the structure selected from the group of
• or
• D) Z5 to Z16 are each C and at least one R1 or R2 comprises an alkyl group that is fully or partially deuterated and said alkyl group comprises a cycloalkyl substituent group that is nondeuterated.