Host materials for electroluminescent devices

An organic light emitting device (OLED) that includes an anode, a cathode, and

• an organic layer disposed between the anode and the cathode, the organic layer comprising a compound of Formula I
• wherein at least one of R1 or R2 includes a polycyclic group selected from the group consisting of Formula A, Formula B, and Formula C:
• wherein
• X1, X2, X3, and X4 are independently CRA or N;
• X5, X6, X7, and X8 are independently CRB or N;
• X9, X10, X11, and X12 are independently CRC or N;
• X13, X14, X15, and X16 are independently CRD or N;
• X17, X18, X19, and X20 are independently CRE or N;
• X21, X22, X23, and X24 are independently CRF or N;
• X25, X26, X27, and X28 are independently CRG or N;
• X29, X30, X31, and X32 are independently CRH or N;
• Y is selected from the group consisting of O, S, NR, and CRR′;
• the maximum number of N atoms that can connect to each other within each ring is two;
• each RA and RB are independently selected from the group consisting of hydrogen, deuterium, halogen, alkyl, cycloalkyl, heteroalkyl, heterocycloalkyl, arylalkyl, alkoxy, aryloxy, amino, silyl, alkenyl, cycloalkenyl, heteroalkenyl, alkynyl, aryl, heteroaryl, acyl, carboxylic acid, ether, ester, nitrile, isonitrile, sulfanyl, sulfinyl, sulfonyl, phosphino, and combinations thereof, and any two adjacent substituents RA or RB are optionally joined to form a fused ring;
• RN is selected from the group consisting of a direct bond, an organic linker, hydrogen, deuterium, alkyl, cycloalkyl, heteroalkyl, heterocycloalkyl, arylalkyl, alkenyl, cycloalkenyl, aryl, heteroaryl, acyl, and combinations thereof;
• or optionally, RN can join with a carbon of X9 to from a ring in Formula A, or RN can join with a carbon of X25 to from a ring in Formula C;
• R1 and R2 are each independently a hydrogen or a substituent selected from the group consisting of deuterium, halogen, alkyl, cycloalkyl, heteroalkyl, heterocycloalkyl, arylalkyl, alkoxy, aryloxy, amino, silyl, alkenyl, cycloalkenyl, heteroalkenyl, alkynyl, aryl, heteroaryl, acyl, carboxylic acid, ether, ester, nitrile, isonitrile, sulfanyl, sulfinyl, sulfonyl, phosphino, and combinations thereof;
• R and R′ are each independently an aryl group;
• each RC, RD, RE, RF, RG, and RH is independently a direct bond, an organic linker, a hydrogen, deuterium, halogen, alkyl, cycloalkyl, heteroalkyl, heterocycloalkyl, arylalkyl, alkoxy, aryloxy, amino, silyl, alkenyl, cycloalkenyl, heteroalkenyl, alkynyl, aryl, heteroaryl, acyl, carboxylic acid, ether, ester, nitrile, isonitrile, sulfanyl, sulfinyl, sulfonyl, phosphino, and combinations thereof, and any two substituents RC, RD, RE, RF, RG, and RH can optionally join to form a ring;
• and
• with the proviso that R1 does not connect to ring B, and R2 does not connect to ring A, and wherein at least one of RC and RD of Formula A is a direct bond or an organic linker, one of RE and RF of Formula B is a direct bond or an organic linker, or one of RG, RH, and RN of Formula C is a direct bond or an organic linker.

A consumer product comprising an organic light-emitting device (OLED) that includes an anode, a cathode, and an organic layer disposed between the anode and the cathode, the organic layer comprising a compound of Formula I

• wherein at least one of R1 or R2 includes a polycyclic group selected from the group consisting of Formula A, Formula B, and Formula C:
• wherein
• X1, X2, X3, and X4 are independently CRA or N;
• X5, X6, X7, and X8 are independently CRB or N;
• X9, X10, X11, and X12 are independently CRC or N;
• X13, X14, X15, and X16 are independently CRD or N;
• X17, X18, X19, and X20 are independently CRE or N;
• X21, X22, X23, and X24 are independently CRF or N;
• X25, X26, X27, and X28 are independently CRG or N;
• X29, X30, X31, and X32 are independently CRH or N;
• Y is selected from the group consisting of O, S, NR, and CRR′;
• the maximum number of N atoms that can connect to each other within each ring is two;
• each RA and RB are independently selected from the group consisting of hydrogen, deuterium, halogen, alkyl, cycloalkyl, heteroalkyl, heterocycloalkyl, arylalkyl, alkoxy, aryloxy, amino, silyl, alkenyl, cycloalkenyl, heteroalkenyl, alkynyl, aryl, heteroaryl, acyl, carboxylic acid, ether, ester, nitrile, isonitrile, sulfanyl, sulfinyl, sulfonyl, phosphino, and combinations thereof, and any two adjacent substituents RA or RB are optionally joined to form a fused ring;
• RN is selected from the group consisting of a direct bond, an organic linker, hydrogen, deuterium, alkyl, cycloalkyl, heteroalkyl, heterocycloalkyl, arylalkyl, alkenyl, cycloalkenyl, aryl, heteroaryl, acyl, and combinations thereof;
• or optionally, RN can join with a carbon of X9 to from a ring in Formula A, or RN can join with a carbon of X25 to from a ring in Formula C;
• R1 and R2 are each independently a hydrogen or a substituent selected from the group consisting of deuterium, halogen, alkyl, cycloalkyl, heteroalkyl, heterocycloalkyl, arylalkyl, alkoxy, aryloxy, amino, silyl, alkenyl, cycloalkenyl, heteroalkenyl, alkynyl, aryl, heteroaryl, acyl, carboxylic acid, ether, ester, nitrile, isonitrile, sulfanyl, sulfinyl, sulfonyl, phosphino, and combinations thereof;
• R and R′ are each independently an aryl group;
• each RC, RD, RE, RF, RG, and RH is independently a direct bond, an organic linker, a hydrogen, deuterium, halogen, alkyl, cycloalkyl, heteroalkyl, heterocycloalkyl, arylalkyl, alkoxy, aryloxy, amino, silyl, alkenyl, cycloalkenyl, heteroalkenyl, alkynyl, aryl, heteroaryl, acyl, carboxylic acid, ether, ester, nitrile, isonitrile, sulfanyl, sulfinyl, sulfonyl, phosphino, and combinations thereof, and any two substituents RC, RD, RE, RF, RG, and RH can optionally join to form a ring;
• and
• with the proviso that R1 does not connect to ring B, and R2 does not connect to ring A, and wherein at least one of RC and RD of Formula A is a direct bond or an organic linker, one of RE and RF of Formula B is a direct bond or an organic linker, or one of RG, RH, and RN of Formula C is a direct bond or an organic linker.