DONOR-ACCEPTOR COMPOUNDS WITH NITROGEN CONTAINING HETEROPOLYAROMATICS AS THE ELECTRON ACCEPTOR

• US 20150021555A1
• Filed: 07/16/2013
• Published: 01/22/2015
• Est. Priority Date: 07/16/2013
• Status: Active Grant

• Current Assignee: Universal Display Corporation
• Original Assignee: Universal Display Corporation
• Inventors: Kwong, Raymond, Xia, Chuanjun, Joseph, Scott, Lam, Siu Tung, Lee, Chi Hang
• Granted Patent: US 9,324,949 B2
• Time in Patent Office: Days
• US Class Current: 257/40
• CPC Class Codes: C09K 11/06 containing organic luminescent materials
• CPC Class Codes: H10K 2101/10 Triplet emission
• CPC Class Codes: H10K 50/11 characterised by the electroluminescent [EL] layers
• CPC Class Codes: H10K 85/636 comprising heteroaromatic hydrocarbons as substituents on the nitrogen atom
• CPC Class Codes: H10K 85/657 Polycyclic condensed heteroaromatic hydrocarbons
• CPC Class Codes: H10K 85/6572 comprising only nitrogen in the heteroaromatic polycondensed ring system, e.g. phenanthroline or carbazole
• CPC Class Codes: H10K 85/6574 comprising only oxygen in the heteroaromatic polycondensed ring system, e.g. cumarine dyes
• CPC Class Codes: H10K 85/6576 comprising only sulfur in the heteroaromatic polycondensed ring system, e.g. benzothiophene

Abstract

Luminescent materials including donor-acceptor compounds with a high triplet energy heteropolyaromatic system, namely, dibenzofuran, dibenzothiophene and dibenzoselenophene with one or multiple nitrogens in the ring as the electron acceptor for use as emitters in organic light emitting diodes is disclosed.

Claims

1. A compound having the formula:

2. The compound of claim 1, wherein the compound is selected from the group consisting of

3. The compound of claim 1, wherein the compound is selected from the group consisting of:

4. The compound of claim 3, wherein S₁ to S₆ are H.

5. A first device comprising a first organic light emitting device, the first organic light emitting device comprising:

an anode;

a cathode; and

an emissive layer, disposed between the anode and the cathode;

wherein the emissive layer comprises a first emitting compound having the formula;

6. The first device of claim 5, wherein at least two of Y¹ to Y⁸ are N.

7. The first device of claim 5, wherein the first emitting compound is selected from the group consisting of

8. The first device of claim 7, wherein the linker L is selected from the group consisting of

9. The first device of claim 7, wherein the Donor is selected from the group consisting of:

10. The first device of claim 5, wherein the first emitting compound is selected from the group consisting of:

11. The first device of claim 10, wherein S₁ to S₆ are H.

12. The first device of claim 5, wherein the first device emits a luminescent radiation at room temperature when a voltage is applied across the organic light emitting device;

wherein the luminescent radiation comprises a delayed fluorescence process.

13. The first device of claim 5, wherein the emissive layer further comprises a first phosphorescent emitting material.

14. The first device of claim 13, wherein the emissive layer further comprises a second phosphorescent emitting material.

15. The first device of claim 5, wherein the emissive layer further comprises a host material.

16. The first device of claim 13, wherein the first device emits a white light at room temperature when a voltage is applied across the organic light emitting device.

17. The first device of claim 16, wherein the first emitting compound emits a blue light with a peak wavelength of about 400 nm to about 500 nm.

18. The first device of claim 16, wherein the first emitting compound emits a yellow light with a peak wavelength of about 530 nm to about 580 nm.

19. The first device of claim 5, wherein the first device comprises a second organic light emitting device;

wherein the second organic light emitting device is stacked on the first organic light emitting device.

20. The first device of claim 5, wherein the first device is a consumer product.

21. The first device of claim 5, wherein the first device is an organic light-emitting device.

22. The first device of claim 5, wherein the first device is a lighting panel.

23. The first device of claim 5, wherein at least one of the R comprises a donor group with at least two electron-donating nitrogens.