Vacuum deposited, non-polymeric flexible organic light emitting devices

• US 7,247,073 B2
• Filed: 10/15/2004
• Issued: 07/24/2007
• Est. Priority Date: 08/12/1996
• Status: Expired due to Fees

• Current Assignee: The Trustees of Princeton University (Princeton University)
• Original Assignee: The Trustees of Princeton University (Princeton University)
• Inventors: Forrest, Stephen R., Burrows, Paul, Gu, Gong
• Primary Examiner(s): Patel; Nimeshkumar D.
• Assistant Examiner(s): PERRY, ANTHONY T
• Application Number:
  US10/966,417
• Publication Number:
  US 20050079279A1
• Time in Patent Office: 1,012 Days
• Field of Search: 313/503, 313/504, 313/506, 313/511, 445/24, 445/49, 427/66, 427/69, 427/70
• US Class Current: 445/24
• CPC Class Codes: H05B 33/10 Apparatus or processes specially adapted to the manufacture of electroluminescent light sources
• CPC Class Codes: H05B 33/12 Light sources with substantially two-dimensional radiating surfaces
• CPC Class Codes: H10K 2102/311 Flexible OLED
• CPC Class Codes: H10K 50/11 characterised by the electroluminescent [EL] layers
• CPC Class Codes: H10K 77/111 Flexible substrates
• CPC Class Codes: H10K 85/324 comprising aluminium, e.g. Alq3
• CPC Class Codes: H10K 85/631 Amine compounds having at least two aryl rest on at least one amine-nitrogen atom, e.g. triphenylamine

Abstract

An organic light emitting device (OLED) is disclosed for which the hole transporting layer, the electron transporting layer and/or the emissive layer, if separately present, is comprised of a non-polymeric material. A method for preparing such OLED'"'"'s using vacuum deposition techniques is further disclosed.

Claims

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

spooling a substrate having a first electrode disposed thereon from a first roll to a second roll;

depositing a first organic layer over the first electrode while the substrate is spooling, the first organic layer comprising a non-polymeric organic material;

depositing a second electrode over the first organic layer;

wherein the first electrode comprises indium tin oxide, and wherein the indium tin oxide has a surface roughness that does not exceed about 3.6 mm.

2. The method of claim 1, wherein the first organic layer is deposited by organic vapor phase deposition.

3. The method of claim 1, wherein the organic device is an organic light emitting device.

4. The method of claim 3, wherein the first organic layer further comprises:

a) a hole transporting layer comprised of a non-polymeric material, and

b) an electron transporting layer comprised of a non-polymeric material.

5. The method of claim 4, wherein said organic light emitting device further includes a separate emissive layer comprised of a non-polymeric material.

6. The method of claim 4, wherein said substrate is transparent.

7. The method of claim 4, wherein said substrate is polymeric.

8. The method of claim 4, wherein said substrate comprises a polyester.

9. The method of claim 4, wherein said organic light emitting device further includes an anode layer comprised of indium tin oxide.

10. The method of claim 4, wherein said hole transporting layer comprises N,N′

-diphenyl-N,N′

-bis(3-methylphenyl)1-1′

biphenyl-4,4′

diamine.

11. The method of claim 4, wherein said electron transporting layer comprises tris-(8-hydroxyquinoline)aluminum.