Manufacturing method of an organic electroluminescence device with light and dark blue emitting layers

• US 7,377,829 B2
• Filed: 04/19/2006
• Issued: 05/27/2008
• Est. Priority Date: 10/29/2003
• Status: Active Grant

• Current Assignee: AU Optronics Corporation
• Original Assignee: AU Optronics Corporation
• Inventors: Ko, Chung-Wen
• Primary Examiner(s): Ton; Toan
• Assistant Examiner(s): QUARTERMAN, KEVIN J
• Application Number:
  US11/308,657
• Publication Number:
  US 20060199460A1
• Time in Patent Office: 769 Days
• Field of Search: 313/498, 313/502, 313/503, 313/504, 313/506, 313/512, 445/24, 445/25, 427/66
• US Class Current: 445/24
• CPC Class Codes: H10K 50/125 specially adapted for multicolour light emission, e.g. for emitting white light

Abstract

An organic electroluminescent device is provided. The device includes a substrate, an anode, an emitting layer and a cathode. The anode is disposed on the substrate, the emitting layer is disposed on the anode, and the cathode is disposed on the emitting layer. The emitting layer is constructed by a dark-blue emitting layer/light-blue emitting layer/reddish orange emitting layer or a light-blue emitting layer/dark-blue emitting layer/reddish orange emitting layer. Since the dark-blue emitting layer has an excellent bright blue light color and high brightness, and the light-blue emitting layer has a long service life, and therefore, organic electroluminescent device of the present invention has an excellent blue light color, high brightness and long service life.

Claims

1. A manufacturing method of an organic electroluminescent device, comprising:

forming a anode on a substrate;

forming an emitting layer on the anode, wherein the emitting layer comprises a blue emitting layer and a reddish orange emitting layer, and wherein the blue emitting layer comprises a first blue emitting layer and a second blue emitting layer; and

forming a cathode on the emitting layer.

2. The manufacturing method of claim 1, wherein the method of forming the emitting layer comprises:

forming the blue emitting layer on the anode; and

forming the reddish orange emitting layer on the blue emitting layer.

3. The manufacturing method of claim 2, wherein the method of forming the blue emitting layer comprises:

forming the first blue emitting layer on the anode; and

forming the second blue emitting layer on the first blue emitting layer.

4. The manufacturing method of claim 2, wherein the method of forming the blue emitting layer comprises:

forming the second blue emitting layer on the anode; and

forming the first blue emitting layer on the second blue emitting layer.

5. The manufacturing method of claim 1, wherein the step of forming the emitting layer comprises:

forming the reddish orange emitting layer on the anode; and

forming the blue emitting layer on the reddish orange emitting layer.

6. The manufacturing method of claim 5, wherein the step of forming the blue emitting layer comprises:

forming the first blue emitting layer the reddish orange emitting layer; and

forming the second blue emitting layer on the first blue emitting layer.

7. The manufacturing method of claim 5, wherein the step of forming the blue emitting layer comprises:

forming the second blue emitting layer on the reddish orange emitting layer; and

forming the first blue emitting layer on the second blue emitting layer.