Color organic OLED device

• US 7,528,545 B2
• Filed: 04/10/2006
• Issued: 05/05/2009
• Est. Priority Date: 02/06/2004
• Status: Active Grant

• Current Assignee: Global OLED Technology LLC (LG Display Co., Ltd.)
• Original Assignee: Eastman Kodak Company
• Inventors: Klubek, Kevin P., Liao, Liang-Sheng, Tang, Ching W.
• Primary Examiner(s): Roy; Sikha
• Assistant Examiner(s): Green; Tracie Y
• Application Number:
  US11/401,069
• Publication Number:
  US 20060181202A1
• Time in Patent Office: 1,121 Days
• Field of Search: 313/504, 313/506, 313507-512
• US Class Current: 313/506
• CPC Class Codes: H10K 50/155 comprising dopants
• CPC Class Codes: H10K 50/165 comprising dopants
• CPC Class Codes: H10K 50/19 Tandem OLEDs
• CPC Class Codes: H10K 59/35 comprising red-green-blue [RGB] subpixels

Abstract

An OLED device comprising an anode and a cathode spaced from the anode, two EL units disposed between the anode and cathode, such EL units being in contact with each other and each having at least one light emitting layer; and each EL unit further includes a p-type doped organic hole transporting layer disposed between the light emitting layer and the anode, and an n-type doped organic electron transporting layer disposed between the light emitting layer and the cathode.

Claims

1. An OLED device comprising:

a) an anode and a cathode spaced from the anode;

b) two EL units disposed between the anode and cathode, such EL units being in contact with each other and each having at least one light emitting layer; and

c) each EL unit further includes a p-type doped organic hole transporting layer disposed between The light emitting layer of that EL unit and the anode, and an n-type doped organic electron transporting layer disposed between the light emitting layer of that EL unit and the cathode;

wherein the n-type doped organic electron transporting layer of The EL unit that is closest to the anode is in direct contact with the p-type doped organic hole transporting layer of the other EL unit.

2. The OLED device of claim 1 wherein at least one p-type doped organic hole transporting layer includes an aromatic tertiary amine.

3. The OLED device of claim 1 wherein at least one n-type doped organic electron transporting layer includes a phenanthroline derivative.

4. The OLED device of claim 2 wherein at least one n-type doped organic electron transporting layer includes a phenanthroline derivative.

5. The OLED device of claim 1 wherein at least one light emitting layer includes an anthracene derivative.

6. The OLED device of claim 4 wherein at least one light emitting layer includes an anthracene derivative.

7. The OLED device of claim 1 wherein each p-type doped organic hole transporting layer is formed of the same material.

8. The OLED device of claim 7 wherein each n-type doped organic electron transporting layer is formed of the same material.