Structure and method of fabricating organic devices

• US 7,285,432 B2
• Filed: 10/12/2005
• Issued: 10/23/2007
• Est. Priority Date: 11/15/2002
• Status: Expired due to Term

• Current Assignee: Universal Display Corporation
• Original Assignee: Universal Display Corporation
• Inventors: Kwong, Raymond, Lu, Min-Hao Michael
• Primary Examiner(s): Mulpuri; Savitri
• Application Number:
  US11/249,978
• Publication Number:
  US 20060029725A1
• Time in Patent Office: 741 Days
• Field of Search: 438 22- 35, 438/99, 427 66- 68
• US Class Current: 438/22
• CPC Class Codes: H10K 2101/10 Triplet emission
• CPC Class Codes: H10K 50/11 characterised by the electroluminescent [EL] layers
• CPC Class Codes: H10K 50/15 Hole transporting layers
• CPC Class Codes: H10K 71/00 Manufacture or treatment specially adapted for the organic devices covered by this subclass
• CPC Class Codes: H10K 71/13 using printing techniques, e.g. ink-jet printing or screen printing
• CPC Class Codes: H10K 71/30 Doping active layers, e.g. electron transporting layers
• CPC Class Codes: H10K 85/1135 Polyethylene dioxythiophene [PEDOT]; Derivatives thereof
• CPC Class Codes: H10K 85/311 Phthalocyanine
• CPC Class Codes: H10K 85/324 comprising aluminium, e.g. Alq3
• CPC Class Codes: H10K 85/342 comprising iridium
• CPC Class Codes: H10K 85/611 Charge transfer complexes
• CPC Class Codes: H10K 85/631 Amine compounds having at least two aryl rest on at least one amine-nitrogen atom, e.g. triphenylamine
• CPC Class Codes: H10K 85/649 Aromatic compounds comprising a hetero atom
• CPC Class Codes: H10K 85/6565 Oxadiazole compounds

Abstract

A method of fabricating an organic light emitting device is provided. A first organic layer is deposited over a first electrode. A second organic layer comprising a small molecule organic material is then deposited using solution processing over and in physical contact with the first organic layer, such that the first organic layer is insoluble in the solution used to deposit the second organic layer. A second electrode is then deposited over the second organic layer.

Claims

1. A method of fabricating an organic light emitting device, comprising:

(a) depositing a first organic layer over a first electrode;

(b) depositing a second organic layer over and in physical contact with the first organic layer, wherein

(1) the second organic layer comprises a small molecule emissive material,

(2) the second organic layer is a patterned layer deposited by solution processing, and

(3) the first organic layer is insoluble in the solution used to deposit the second organic layer; and

(c) depositing a second electrode over the second organic layer;

wherein the first organic layer comprises a cross linked material.

2. The method of claim 1, wherein the first organic layer is cross-linked thermally, photochemically, or a combination thereof.

3. The method of claim 1, wherein the first organic layer comprises at least one of NPD, an aromatic macrocyclic material, and a polyaromatic material.

4. The method of claim 1, wherein, prior to cross-linking, the cross-linked material comprises cross-likable groups selected from the group consisting of acrylate groups, vinyl groups, diacetylene groups, epoxide groups, oxetane groups, and a combination thereof.

5. The method of claim 3, wherein, prior to cross-linking, the cross-linked material comprises cross-likable groups selected from the group consisting of acrylate groups, vinyl groups, diacetylene groups, epoxide groups, oxetane groups, and a combination thereof.

6. The method of claim 4, wherein the cross-linkable groups comprise vinyl groups.

7. The method of claim 4, wherein the cross-linkable groups comprise acrylate groups.

8. The method of claim 4, wherein the cross-linkable groups comprise diacetylene groups.

9. The method of claim 4, wherein the cross-linkable groups comprise epoxide groups.

10. The method of claim 4, wherein the cross-linkable groups comprise oxetane groups.

11. The method of claim 5, wherein the first organic layer comprises NPD.

12. The method of claim 5, wherein the first organic layer comprises NPD, and the cross-linkable groups comprise vinyl groups.

13. The method of claim 5, wherein the first organic layer comprises NPD, and the cross-linkable groups comprise acrylate groups.

14. The method of claim 5, wherein the first organic layer comprises NPD, and the cross-linkable groups comprise diacetylene groups.

15. The method of claim 5, wherein the first organic layer comprises NPD, and the cross-linkable groups comprise epoxide groups.

16. The method of claim 5, wherein the first organic layer comprises NPD, and the cross-linkable groups comprise oxetane groups.

17. The method of claim 5, wherein the first organic layer comprises an aromatic macrocyclic material.

18. The method of claim 5, wherein the first organic layer comprises an aromatic macrocyclic material, and the cross-linkable groups comprise vinyl groups.

19. The method of claim 5, wherein the first organic layer comprises an aromatic macrocyclic material, and the cross-linkable groups comprise acrylate groups.

20. The method of claim 5, wherein the first organic layer comprises an aromatic macrocyclic material, and the cross-linkable groups comprise diacetylene groups.

21. The method of claim 5, wherein the first organic layer comprises an aromatic macrocyclic material, and the cross-linkable groups comprise epoxide groups.

22. The method of claim 5, wherein the first organic layer comprises an aromatic macrocyclic material, and the cross-linkable groups comprise oxetane groups.

23. The method of claim 5, wherein the first organic layer comprises a polyaromatic material.

24. The method of claim 5, wherein the first organic layer comprises a polyaromatic material, and the cross-linkable groups comprise vinyl groups.

25. The method of claim 5, wherein the first organic layer comprises a polyaromatic material, and the cross-linkable groups comprise acrylate groups.

26. The method of claim 5, wherein the first organic layer comprises a polyaromatic material, and the cross-linkable groups comprise diacetylene groups.

27. The method of claim 5, wherein the first organic layer comprises a polyaromatic material, and the cross-linkable groups comprise epoxide groups.