Depositing premixed materials

• US 9,040,962 B2
• Filed: 04/28/2010
• Issued: 05/26/2015
• Est. Priority Date: 04/28/2010
• Status: Active Grant

• Current Assignee: Nippon Steel & Sumikin Chemical Co., Ltd. (Nippon Steel Corporation), Universal Display Corporation
• Original Assignee: Nippon Steel & Sumikin Chemical Co., Ltd. (Nippon Steel Corporation), Universal Display Corporation
• Inventors: Adamovich, Vadim, Weaver, Michael, Kwong, Raymond, Xia, Chuanjun, Alleyne, Bert, Kai, Takahiro, Komori, Masaki, Yamamoto, Toshihiro
• Primary Examiner(s): Ho, Anthony
• Application Number:
  US13/640,000
• Publication Number:
  US 20130112952A1
• Time in Patent Office: 1,854 Days
• Field of Search: 257/40, 257/E51.001
• US Class Current: 257/40
• CPC Class Codes: C09B 57/00 Other synthetic dyes of known constitution
• CPC Class Codes: H10K 2101/90 Multiple hosts in the emissive layer
• CPC Class Codes: H10K 2102/103 comprising indium oxides, e.g. ITO
• CPC Class Codes: H10K 50/11 characterised by the electroluminescent [EL] layers
• CPC Class Codes: H10K 71/30 Doping active layers, e.g. electron transporting layers
• CPC Class Codes: H10K 85/324 comprising aluminium, e.g. Alq3
• CPC Class Codes: H10K 85/342 comprising iridium
• CPC Class Codes: H10K 85/622 containing four rings, e.g. pyrene
• 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

A combination of host materials suitable for co-evaporation or premix evaporation, and devices containing the combination of host materials are provided. The combination of host materials provides improved lifetime and efficiency. A method for fabricating devices containing the host material combination is also provided.

Claims

1. A first device comprising an organic light emitting device, further comprising:

a first electrode;

a second electrode; and

a first organic layer, disposed between the first electrode and the second electrode, wherein the first organic layer comprises an organic composition;

wherein the organic composition comprises

a first compound having the formula;

2. The first device of claim 1, wherein the first compound has the formula:

3. The first device of claim 2, wherein the set of non-hydrogen substituents selected for R₁, R₂, R₃, R₄, and R₅, and the set of non-hydrogen substituents selected for R₆, R₇, and R₈ are the same.

4. The first device of claim 1, wherein the first compound has the formula:

5. The first device of claim 4, wherein the first compound is selected from the group consisting of:

6. The first device of claim 5 wherein the second compound is selected from the group consisting of:

7. The first device of claim 1, wherein the first compound has the formula:

8. The first device of claim 7, wherein the set of non-hydrogen substituents selected for R₁, R₂, R₃, R₄, and R₅, and the set of non-hydrogen substituents selected for R₆, R₇, and R₈ are the same.

9. The first device of claim 1, wherein the first compound has the formula:

10. The first device of claim 1, wherein the first compound is selected from the group consisting of:

11. The first device of claim 10 wherein the second compound is selected from the group consisting of:

12. The first device of claim 1, wherein the first organic layer is an emissive layer and the first compound and the second compound are hosts, and wherein the emissive layer further comprises an emissive phosphorescent dopant.

13. The first device of claim 1, wherein the emissive phosphorescent dopant is selected from the group consisting of:

14. The first device of claim 1, wherein the first electrode is an anode and the first organic layer is deposited over the anode.

15. The first device of claim 1, wherein the device further comprises a second organic layer different from the first organic layer, and the first organic layer is a non-emissive layer.

16. The first device of claim 15, wherein the first organic layer is a blocking layer.

17. The first device of claim 1, wherein the first compound has an evaporation temperature and the second compound has an evaporation temperature, wherein the evaporation temperature of the first compound is within 30°

C. of the evaporation temperature of the second compound.

18. A method of fabricating an organic light emitting device comprising a first electrode, a second electrode, and a first organic layer disposed between the first electrode and the second electrode, wherein the first organic layer comprises an organic composition further comprising a first compound and a second compound, the method comprising:

providing a substrate having the first electrode disposed thereon;

depositing the organic composition over the first electrode; and

depositing the second electrode over the first organic layer,

wherein the first compound has the formula;

19. A host composition comprising a mixture of a first compound and a second compound, wherein the first compound has the formula:

20. A host composition comprising a mixture of a first compound and a second compound, wherein the first compound has the formula: