Binaphthol based chromophores for the fabrication of blue organic light emitting diodes
AssigneeThe Regents of the University of California
InventorsGuillermo C. Bazan, Hadjar Benmansour, Yoshiharu Sato, Takeshi Shioya
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Abstract
A blue electroluminescent material based on a binaphtyl compound of the general formula (I). Particular embodiments having the general formula have good solubilities in common organic solvents, resist crystallization and can be sublimed in a device fabrication process. These properties enable the fabrication of organic electroluminescent devices.
Claims4
An organic light emitting device comprising an anode and a cathode, and an emissive layer between the anode and cathode, the device including a hole-blocking layer between the emissive layer and the cathode comprising a binaphthyl compound of the formula:
- wherein each Ar1 and Ar2 is independently a substituted or non-substituted polycyclic aromatic hydrocarbon or a substituted or non-substituted aromatic heterocycle, each X1 and X2 is independently a substituted or non-substituted aromatic hydrocarbon, each n1 and n2 is independently 0 or 1, each R1 and R2 is independently a hydroxyl group, a substituted or non-substituted alkyl group, or a substituted or non-substituted alkoxy group, wherein R1 and R2 can be bound to each other to form a ring structure wherein the ring structure can have substituent groups, and wherein the compound's binaphthyl framework can be independently substituted by a halogen, a hydroxyl group, or a substituted or non-substituted alkyl, alkenyl, alkoxy or alkoxycarbonyl group at any position except those occupied by (X1)n1Ar1, (X2)n2Ar2, R1 and R2;
- in which the hole-blocking layer between the emissive layer and the cathode comprises a compound of the formula:
A binaphthyl compound of the formula
A binaphthyl compound of the formula
An organic light emitting device comprising an anode and a cathode, and an emissive layer between the anode and cathode, the device including a hole-blocking layer between the emissive layer and the cathode comprising a binaphthyl compound of the formula:
- wherein each Ar1 and Ar2 is independently a substituted or non-substituted polycyclic aromatic hydrocarbon or a substituted or non-substituted aromatic heterocycle, each X1 and X2 is independently a substituted or non-substituted aromatic hydrocarbon, each n1 and n2 is independently 0 or 1, each R1 and R2 is independently a hydroxyl group, a substituted or non-substituted alkyl group, or a substituted or non-substituted alkoxy group, wherein R1 and R2 can be bound to each other to form a ring structure wherein the ring structure can have substituent groups, and wherein the compound's binaphthyl framework can be independently substituted by a halogen, a hydroxyl group, or a substituted or non-substituted alkyl, alkenyl, alkoxy or alkoxycarbonyl group at any position except those occupied by (X1)n1Ar1, (X2)n2Ar2, R1 and R2,
- in which the hole-blocking layer between the emissive layer and the cathode comprises a compound of the formula:
Dependencies are inferred from the claim text.