Structure and method of fabricating organic devices

• US 6,891,326 B2
• Filed: 11/15/2002
• Issued: 05/10/2005
• Est. Priority Date: 11/15/2002
• Status: Expired due to Term

• Current Assignee: Universal Display Corporation
• Original Assignee: Universal Display Corporation
• Inventors: Lu, Min-Hao Michael
• Primary Examiner(s): Patel, Nimeshkumar D.
• Assistant Examiner(s): Santiago, Mariceli
• Application Number:
  US10/295,322
• Publication Number:
  US 20040095064A1
• Time in Patent Office: 907 Days
• Field of Search: 313/503, 313/504, 313/506, 313/509, 428/690, 428/917, 427/66, 445/24
• US Class Current: 313/504
• CPC Class Codes: H10K 59/35 comprising red-green-blue [RGB] subpixels
• 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 85/631 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: Y10S 428/917 Electroluminescent

Abstract

An organic light emitting device that may have mixed organic layers is provided. A method of fabricating such an organic light emitting device is provided. A first organic material is solution deposited to form a patterned organic layer over a first electrode. A second organic material is deposited, by means other than solution processing, on and in physical contact with the first organic layer to form a second organic layer. The second organic layer forms a blanket layer over the first organic layer. A second electrode is then deposited over the second organic layer.

Claims

1. An organic light emitting device, comprising:

a bottom electrode;

a patterned first organic layer disposed over the bottom electrode, comprising a first region capable of emitting a first spectrum of light;

a second organic layer disposed over and in physical contact with the first organic layer, the second organic layer being disposed over the bottom electrode, the second organic layer including a phosphorescent organic material capable of emitting a second spectrum of light, wherein the second spectrum of light is blue; and

a top electrode disposed over the second organic layer.

2. The device of claim 1, wherein the patterned first organic layer further comprises a second regions, wherein the second region is capable of emitting a third spectrum of light.

3. The device of claim 2, wherein each of said first, second and third spectra of light are different.

4. The device of claim 2, wherein the first spectrum of light is red.

5. The device of claim 2, wherein the third spectrum of light is green.

6. The device of claim 1, wherein the first organic layer is deposited by solution processing.

7. The device of claim 6, wherein the solution processing is by ink jet.

8. The device of claim 1, wherein the second organic layer is deposited by thermal vapor phase deposition.

9. The device of claim 1, wherein the top electrode includes indium tin oxide.

10. The device of claim 1, wherein the top and bottom electrodes are electrically connected to the organic layers.

11. The device of claim 1, wherein the first organic layer is a hole transport layer and the second organic layer is an emissive layer.

12. The device of claim 1, wherein the second organic layer is an emissive layer comprising a neat layer of emissive material.

13. The device of claim 1, further comprising a third organic layer disposed between the bottom electrode and the first organic layer.

14. The device of claim 13, wherein the third organic layer is a hole transport layer, and the first organic layer is an emissive layer.

15. The device of claim 13, wherein the third organic layer is a hole injection layer, and the first organic layer is an emissive layer.

16. The device of claim 13, wherein the third organic layer is an electron blocking layer, and the first organic layer is an emissive layer.

17. The device of claim 13, further comprising a fourth organic layer disposed between the bottom electrode and the third organic layer.

18. The device of claim 17, wherein the fourth organic layer is a hole transport layer, and the third organic layer is an electron blocking layer.

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

depositing a bottom electrode over a substrate;

depositing by solution deposition a patterned first organic layer over the bottom electrode, wherein the first organic layer comprises a first region capable of emitting a first spectrum of light;

depositing by a non-solution based technique a second organic layer over and in physical contact with the first organic layer, the second organic layer being disposed over the bottom electrode, the second organic layer including a phosphorescent organic material capable of emitting a second spectrum of light, wherein the second spectrum of light is blue; and

depositing a top electrode over the second organic layer.

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

depositing a bottom electrode over a substrate;

depositing by solution deposition a patterned first organic layer over the bottom electrode, wherein the first organic layer comprises two regions, a first region capable of emitting a first spectrum of light, and a second region capable of emitting a third spectrum of light;

depositing by a non-solution based technique a second organic layer over the first organic layer and the bottom electrode, and in physical contact with the first organic layer, wherein the second organic layer includes a phosphorescent organic material capable of emitting a second spectrum of light, wherein the second spectrum of light is blue; and

depositing a top electrode over the second organic layer.

21. The method of claim 20, wherein the first spectrum of light is red, the second spectrum of light is blue, and the third spectrum of light is green.