Patent ID: 11882759
Assignee: UNIVERSAL DISPLAY CORPORATION
Field: Organic fine chemistry (Chemistry)
Classification: CPC H  C | IPC C  H

Claim 12:
13. An organic light emitting device (OLED) comprising:
an anode; a cathode; and an organic layer, disposed between the anode and the cathode, the organic layer including a compound comprising a ligand LA of Formulae I, II, or III:, wherein the ligand LA is coordinated to a transition metal M as represented by the dashed lines, and optionally, the metal M is coordinated to a ligand LB;
A is N, B, or CR7 in Formulae I and II and A is B or CR7 in Formula III;
Y is absent, or selected from the group consisting of C(O), C(Rya)(Ryb), C═C(Rya)(Ryb), and Si(Rya)(RYb), where if Y of Ring A is absent then ring carbon of R2 is bonded to N; wherein Rya and Ryb are independently hydrogen or a substituent selected from the group consisting of deuterium, halogen, alkyl, cycloalkyl, heteroalkyl, alkoxy, aryloxy, amino, aryl, heteroaryl, and any combination thereof; or Rya and Ryb can join to form a carbocyclic ring or a heterocyclic ring, each of which is optionally substituted;
R1, R2, R3, R4, R5, R6, and R7 are independently hydrogen or a substituent selected from the group consisting of deuterium, halogen, alkyl, cycloalkyl, heteroalkyl, alkoxy, aryloxy, amino, silyl, alkenyl, cycloalkenyl, heteroalkenyl, alkynyl, aryl, heteroaryl, acyl, carboxylic acid, ether, ester, nitrile, isonitrile, phosphino, sulfanyl, sulfinyl, sulfonyl, and any combination thereof; wherein any two adjacent R4, R5, and R6, may optionally join to form a carbocyclic ring or a heterocyclic ring, each of which is optionally substituted;
RN is selected from the group consisting of hydrogen, deuterium, alkyl, cycloalkyl, heteroalkyl, alkoxy, aryloxy, aryl, heteroaryl, nitrile, and any combination thereof;
wherein for the compounds of formula III at least one of R2, R3, and R4 is selected from N(Ar1)RN′ or aryloxy; wherein Ar1 is selected from aryl or heteroaryl, each of which is optionally substituted; and RN′ is selected from the group consisting of alkyl, cycloalkyl, heteroalkyl, alkoxy, aryloxy, and heteroaryl, each of which is optionally substituted; wherein the adjacent R1, R2, R3, or R4 may optionally join to form a carbocyclic ring or a heterocyclic ring, each of which is optionally substituted, and when A is CR7, A does not form an aromatic ring with R5;
wherein for the compounds of formula I, the adjacent R2, R3, and R4, or R1 and RN, can join to form a carbocyclic ring or a heterocyclic ring, each of which is optionally substituted;
wherein for the compounds of formula II, the adjacent R1, R2 and R3, and/or R4 and RN can join to form a carbocyclic ring or a heterocyclic ring, each of which is optionally substituted; and
provided that when Y is not present and A is N, then R6 is not tert-butyl;
provided that at least one of the following conditions is satisfied:
(i) the ligand LA is represented by Formula I, Formula II, or Formula III and A is B;
(ii) the ligand LA is represented by Formula I, Formula II, or Formula III; R4 is alkenyl; and R4 and R5 join to form a carbocyclic ring;
(iii) the ligand LA is represented by Formula I or Formula II and Y is selected from the group consisting of C(O), C(Rya)(Ryb), C═C(Rya)(Ryb), and Si(Rya)(Ryb);
(iv) the ligand LA is represented by Formula III and at least one of R2, R3, and R4 is N(Ar1)RN′.