ORGANIC EL DEVICE HAVING A HOLE INJECTING ELECTRODE INCLUDING A TRANSPARENT ELECTRODE AND A METAL ELECTRODE

• US 20010026126A1
• Filed: 07/08/1998
• Published: 10/04/2001
• Est. Priority Date: 07/09/1997
• Status: Active Grant

• Current Assignee: Futaba Corporation
• Original Assignee: TDK Corporation
• Inventors: NAKAYA, KENJI, CODAMA, MITSUFUMI
• Granted Patent: US 6,320,311 B2
• Time in Patent Office: Days
• US Class Current: 313/506
• CPC Class Codes: H05B 33/26 characterised by the composition or arrangement of the conductive material used as an electrode
• CPC Class Codes: H05B 33/28 of translucent electrodes
• CPC Class Codes: H10K 50/814 combined with auxiliary electrodes, e.g. ITO layer combined with metal lines
• CPC Class Codes: H10K 59/10 OLED displays
• CPC Class Codes: H10K 59/1795 comprising structures specially adapted for lowering the resistance

Abstract

An organic EL device comprises a hole injecting electrode, an electron injecting electrode, and at least one organic layer located between both the electrodes. The hole injecting electrode comprises a transparent electrode at a light emitting area, and a metal electrode located at a portion other than the light emitting area and having a sheet resistance of 1 Ω/□ or lower.

Claims

1. An organic electroluminescent device comprising a hole injecting electrode, an electron injecting electrode, and at least one organic layer interleaved between both said electrodes, wherein:

said hole injecting electrode comprises a transparent electrode at a light emitting area, and a metal electrode located at a portion other than said light emitting area and connected to said transparent electrode, and having a sheet resistance of 1 Ω

/□

or lower.

2. The organic electroluminescent device of

claim 1

, wherein said transparent electrode has a thickness of 100 mn or less.

3. The organic electroluminescent device of

claim 1

, wherein said transparent electrode is an ITO transparent electrode.

4. The organic electroluminescent device of

claim 1

, wherein said transparent electrode is an IZO transparent electrode.

5. The organic electroluminescent device of

claim 1

, which further includes a barrier layer between said transparent electrode and said metal electrode.

6. The organic electroluminescent device of

claim 1

, wherein said metal electrode is connected to all the peripheral area of the transparent electrode.

7. The organic electroluminescent device of

claim 6

forming a segment type display.

8. The organic electroluminescent device of

claim 6

forming a simple matrix type display.