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, wherein the organic layer comprises a compound having a structure of Formula I:
• wherein
• rings A, B, C, D, E, and F are each independently a single or fused ring system, consisting of one or more 5-membered or 6-membered carbocyclic or heterocyclic rings;
• L1, L2, L3, L4, L5, and L6 are each independently optionally present or is selected from the group consisting of O, S, Se, BR, BRR′, NR, C═R, CRR′, SiRR′, P (O)R, and GeRR′;
• a, b, c, d, e and f are each 0 for not present or 1 for present;
• a+b+c and d+e+fare each greater than or equal to 2;
• with the proviso that the following two conditions are true:
• 1) when a and d are both 0, then rings A and D are not both benzene rings linked through a C—C bond para to the two boron centers, and
• 2) when rings A, B, C, D, E, and F are all benzene rings and a and d are both 0, then L2, L3, L5 and L6 are not all NR;
• R1, R2, R3, R4, R5, and Re are each independently represent zero, mono, or up to a maximum allowed substitution to its associated ring;
• each of R, R′, R1, R2, R3, R4, R5, and R6 is independently a hydrogen or a substituent selected from the group consisting of deuterium, halogen, alkyl, cycloalkyl, heteroalkyl, heterocycloalkyl, arylalkyl, alkoxy, aryloxy, amino, silyl, germyl, alkenyl, cycloalkenyl, heteroalkenyl, alkynyl, aryl, heteroaryl, acyl, carboxylic acid, ether, ester, nitrile, isonitrile, sulfanyl, sulfinyl, sulfonyl, phosphino, selenyl, and combinations thereof;
• and
• any two of adjacent R, R′, R1, R2, R3, R4, R5, and R6 can be joined or fused to form a ring.

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,
• wherein the organic layer comprises a compound having a structure of Formula I:
• wherein
• rings A, B, C, D, E, and F are each independently a single or fused ring system, consisting of one or more 5-membered or 6-membered carbocyclic or heterocyclic rings;
• L1, L2, L3, L4, L5, and L6 are each independently optionally present or is selected from the group consisting of O, S, Se, BR, BRR′, NR, C═R, CRR′, SIRR′, P (O)R, and GeRR′;
• a, b, c, d, e and f are each 0 for not present or 1 for present;
• a+b+c and d+e+fare each greater than or equal to 2;
• with the proviso that the following two conditions are true:
• 1) when a and d are both 0, then rings A and D are not both benzene rings linked through a C—C bond para to the two boron centers, and
• 2) when rings A, B, C, D, E, and F are all benzene rings and a and d are both 0, then L2, L3, L5 and L6 are not all NR;
• R1, R2, R3, R4, R5, and R6 are each independently represent zero, mono, or up to a maximum allowed substitution to its associated ring;
• each of R, R′, R1, R2, R3, R4, R5, and R6 is independently a hydrogen or a substituent selected from the group consisting of deuterium, halogen, alkyl, cycloalkyl, heteroalkyl, heterocycloalkyl, arylalkyl, alkoxy, aryloxy, amino, silyl, germyl, alkenyl, cycloalkenyl, heteroalkenyl, alkynyl, aryl, heteroaryl, acyl, carboxylic acid, ether, ester, nitrile, isonitrile, sulfanyl, sulfinyl, sulfonyl, phosphino, selenyl, and combinations thereof;
• and
• any two of adjacent R, R′, R1, R2, R3, R4, R5, and R6 can be joined or fused to form a ring.