Organic electroluminescent materials and devices
AssigneeUniversal Display Corporation
InventorsGregg KOTTAS, James FIORDELISO, Bin MA, Chuanjun XIA, Scott BEERS, Jason BROOKS
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Abstract
Novel phosphorescent tetradentate platinum compounds of Formula I are provided. The complexes contain a dibenzo moiety, which allows for the creation of OLED devices with improved properties when compounds of Formula I are incorporated into such devices. Compounds of Formula I′ that comprise two ligands that contain a 5-membered carbocyclic or heterocyclic ring, one of which contains an imidazole ring with a twisted aryl group attached to N−1 and a second aromatic ring that is attached to the platinum via a carbon atom. These compounds may be advantageously used in OLEDs.
Claims20
A compound having the formula:
- wherein G has the structure:
- and wherein G is fused to any two adjacent carbon atoms on ring A;
- wherein ring B, ring C, and ring D are 5- or 6-membered carbocyclic or heterocyclic aromatic rings;
- wherein L1, L2, and L3 are independently selected from the group consisting of a single bond, BR, NR, PR, O, S, Se, C═O, S═O, SO2, CRR′, SiRR′, and GeRR′;
- wherein at least one of L1, L2, and L3 is not a single bond;
- wherein X is selected from the group consisting of BR, NR, PR, O, S, Se, C═O, S═O, SO2, CRR′, SiRR′, and GeRR′;
- wherein Z1, Z2, Z3, and Z4 are nitrogen or carbon atoms;
- wherein A1, A2, A3, A4, A5, A6, A7, and A8 comprise carbon or nitrogen;
- wherein R1, R2, R3, and R4 independently represent mono-, di-, tri-, or tetra-substitution;
- wherein R1 is optionally fused, R2 is optionally fused to ring B, R3 is optionally fused to ring C, and R4 is optionally fused to ring D;
- wherein R3 and R4 are optionally linked to form a ring;
- wherein if L2 is not a single bond, R3 and L2 or R4 and L2 are optionally linked to form a ring;
- and
- wherein R, R′, R1, R2, R3, and R4 are independently selected from the group consisting of hydrogen, deuterium, halide, alkyl, cycloalkyl, heteroalkyl, arylalkyl, alkoxy, aryloxy, amino, silyl, alkenyl, cycloalkenyl, heteroalkenyl, alkynyl, aryl, heteroaryl, acyl, carbonyl, carboxylic acids, ester, nitrile, isonitrile, sulfanyl, sulfinyl, sulfonyl, phosphino, and combinations thereof.
A first device comprising a first organic light emitting device, further comprising:
- an anode;
- a cathode;
- and
- an organic layer, disposed between the anode and the cathode, comprising a compound having the formula:
- wherein G has the structure:
- and wherein G is fused to any two adjacent carbon atoms on ring A;
- wherein ring B, ring C, and ring D are 5- or 6-membered carbocyclic or heterocyclic aromatic rings;
- wherein L1, L2, and L3 are independently selected from the group consisting of a single bond, BR, NR, PR, O, S, Se, C═O, S═O, SO2, CRR′, SiRR′, and GeRR′;
- wherein at least one of L1, L2, and L3 is not a single bond;
- wherein X is selected from the group consisting of BR, NR, PR, O, S, Se, C═O, S═O, SO2, CRR′, SiRR′, and GeRR′;
- wherein Z1, Z2, Z3, and Z4 are nitrogen or carbon atoms;
- wherein A1, A2, A3, A4, A5, A6, A7, and A8 comprise carbon or nitrogen;
- wherein R1, R2, R3, and R4 independently represent mono-, di-, tri-, or tetra-substitution;
- wherein R1 is optionally fused, R2 is optionally fused to ring B, R3 is optionally fused to ring C, and R4 is optionally fused to ring D;
- and
- wherein R, R′, R1, R2, R3, and R4 are independently selected from the group consisting of hydrogen, deuterium, halide, alkyl, cycloalkyl, heteroalkyl, arylalkyl, alkoxy, aryloxy, amino, silyl, alkenyl, cycloalkenyl, heteroalkenyl, alkynyl, aryl, heteroaryl, acyl, carbonyl, carboxylic acids, ester, nitrile, isonitrile, sulfanyl, sulfinyl, sulfonyl, phosphino, and combinations thereof.
Dependencies are inferred from the claim text.