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US 8,709,615 B2Granted
Heteroleptic iridium complexes as dopants
AssigneeUniversal Display Corporation
InventorsGregg Kottas, Nasrin Ansari, Zeinab Elshenawy, Alan DeAngelis, Chuanjun Xia
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Abstract
Novel phosphorescent heteroleptic iridium complexes with phenylpyridine and dibenzo-containing ligands are provided. Alkyl substitution at specific positions on the ligands gives rise to compounds with improved OLED properties, including saturated green emission.
Claims17
A compound having the formula:
- wherein the number of carbon atoms in R1 is at least 2;
- wherein R1 is alkyl and R2 is hydrogen;
- wherein R3, R4, R5, R6 are optionally linked;
- wherein Ra and Rb represent mono-, di-, tri- or tetra-substitution;
- wherein X is selected from the group consisting of PR, C═O, S═O, SO2, CRR′, SiRR′ and GeRR′;
- wherein Ra, Rb, R, R′, R3, R4, R5, and R6 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;
- and wherein n is 1 or 2.
4 more elements
A first device comprising a first organic light emitting device, comprising:
- an anode;
- a cathode;
- and
- an organic layer, disposed between the anode and the cathode, comprising a compound having the formula:
- wherein the number of carbon atoms in R1 is at least 2;
- wherein R1 is alkyl and R2 is hydrogen;
- wherein R3, R4, R5, R6 are optionally linked;
- wherein Ra and Rb represent mono-, di-, tri- or tetra-substitution;
- wherein X is selected from the group consisting of PR, C═O, S═O, SO2, CRR′, SiRR′ and GeRR′;
- wherein Ra, Rb, R, R′, R3, R4, R5, and R6 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;
- and wherein n is 1 or 2.
8 more elements
Dependencies are inferred from the claim text.