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US 2023/0147780 A1Published application
Chemical stability of blue emitting tadf materials
AssigneeArizona Board Od Regents On Behalf of Arizona State University
InventorJian Li
Life of this patent
Estimating the term…
Abstract
t-DABNA has demonstrated good operational stability as a blue emitter in organic electroluminescent devices. The operational stability of t-DABNA can be increased by rigidifying the molecular structure, such as in compounds of Formula I. Devices incorporating compounds of Formula I may exhibit beneficial device performance characteristics.
Claims15
A compound of Formula I:
- wherein
- X1 and X2 each independently represents N, CR, or SiR;
- Y, Y1a, Y4a, Y5a, Y9a, Y10a, Y1b, Y2b, Y3b, Y4b, Y5b, Y6b, Y7b, Y8b, Y9b, and Y10b each independently represents C, N, or Si;
- each L1, L2, L3 and L4 independently represents no bond, a single bond, a linking atom, or a divalent linking group;
- wherein the linking atom or divalent linking group, if valency permits, is optionally substituted with one or more substituents R;
- Ar1 and Ar3 independently represent phenyl, carbazole, dibenzothiophene, or dibenzofuran;
- wherein Ar1 is optionally substituted at any position with one or more substituents R1, and wherein Ar3 is optionally substituted at any position with one or more substituents R3;
- each occurrence of R, R1, R2, R3, R4, and R5 independently represents hydrogen, deuterium, halogen, hydroxyl, thiol, nitro, cyano, nitrile, isonitrile, sulfinyl, mercapto, sulfo, carboxyl, hydrazino;
- substituted or unsubstituted:
- aryl, perfluoroaryl, perdeuteroaryl, cycloalkyl, cycloalkenyl, heterocyclyl, heteroaryl, alkyl, perdeuterated alkyl, alkenyl, alkynyl, amino, monoalkylamino, dialkylamino, monoarylamino, diarylamino, alkoxy, aryloxy, haloalkyl, aralkyl, ester, alkoxycarbonyl, acylamino, alkoxycarbonylamino, aryloxycarbonylamino, sulfonylamino, sulfamoyl, carbamoyl, alkylthio, ureido, phosphoramide, silyl, polymeric;
- or any conjugate or combination thereof;
- any two adjacent R, R1, R2, R3, R4, and R5 may together form a fused ring;
- and
- each n is independently an integer, valency permitting.
11 more elements
An organic electroluminescent device comprising:
- an anode;
- a cathode;
- and
- at least one organic layer, disposed between the anode and the cathode, comprising at least one compound of Formula I:
- wherein
- X1 and X2 each independently represents N, CR, or SiR;
- Y, Y1a, Y4a, Y5a, Y9a, Y10a, Y1b, Y2b, Y3b, Y4b, Y5b, Y6b, Y7b, Y8b, Y9b, and Y10b each independently represents C, N, or Si;
- each L1, L2, L3 and L4 independently represents no bond, a single bond, a linking atom, or a divalent linking group;
- wherein the linking atom or divalent linking group, if valency permits, is optionally substituted with one or more substituents R;
- Ar1 and Ar3 independently represent phenyl, carbazole, dibenzothiophene, or dibenzofuran;
- wherein Ar1 is optionally substituted at any position with one or more substituents R1, and wherein Ar3 is optionally substituted at any position with one or more substituents R3;
- each occurrence of R, R1, R2, R3, R4, and R5 independently represents hydrogen, deuterium, halogen, hydroxyl, thiol, nitro, cyano, nitrile, isonitrile, sulfinyl, mercapto, sulfo, carboxyl, hydrazino;
- substituted or unsubstituted:
- aryl, perfluoroaryl, perdeuteroaryl, cycloalkyl, cycloalkenyl, heterocyclyl, heteroaryl, alkyl, perdeuterated alkyl, alkenyl, alkynyl, amino, monoalkylamino, dialkylamino, monoarylamino, diarylamino, alkoxy, aryloxy, haloalkyl, aralkyl, ester, alkoxycarbonyl, acylamino, alkoxycarbonylamino, aryloxycarbonylamino, sulfonylamino, sulfamoyl, carbamoyl, alkylthio, ureido, phosphoramide, silyl, polymeric;
- or any conjugate or combination thereof;
- any two adjacent R, R1, R2, R3, R4, and R5 may together form a fused ring;
- and
- each n is independently an integer, valency permitting.
15 more elements
Dependencies are inferred from the claim text.