Organic electroluminescent device having organic field effect transistor and organic light-emitting diode and method for fabricating the same

• US 6,483,123 B1
• Filed: 01/18/2002
• Issued: 11/19/2002
• Est. Priority Date: 08/22/2001
• Status: Expired due to Term

• Current Assignee: Electronics and Telecommunications Research Institute
• Original Assignee: Electronics and Telecommunications Research Institute, Korea Electronics
• Inventors: Lee, Jeong-ik, Oh, Ji-young, Kim, Seong-hyun, Yang, Yong-suk, Chu, Hye-yong, Do, Lee-mi, Zyung, Tae-hyoung, Lee, Hyo-young
• Primary Examiner(s): Lee, Eddie
• Assistant Examiner(s): NGUYEN, JOSEPH H
• Application Number:
  US10/052,651
• Time in Patent Office: 305 Days
• Field of Search: 257/40, 257/114, 257/292, 257/99, 257/79, 257/103
• US Class Current: 257/40
• CPC Class Codes: H10K 10/462 Insulated gate field-effect transistors [IGFETs]
• CPC Class Codes: H10K 10/466 Lateral bottom-gate IGFETs comprising only a single gate
• CPC Class Codes: H10K 19/10 comprising field-effect transistors
• CPC Class Codes: H10K 59/1213 the pixel elements being TFTs
• CPC Class Codes: H10K 59/123 Connection of the pixel electrodes to the thin film transistors [TFT]
• CPC Class Codes: H10K 59/125 including organic TFTs [OTFT]

Abstract

Provided is an organic electroluminescent (EL) device including a substrate, a transparent electrode formed on the substrate, an organic light-emitting layer formed on the transparent electrode, a metal electrode formed on the organic light-emitting layer, a first insulating layer formed on the metal electrode, a gate electrode formed on the first insulating layer, a second insulating layer formed on the gate electrode, an organic semiconducting layer formed on the second insulating layer, a source electrode connected to one end of the organic semiconducting layer on the second. insulating layer and connected to the metal electrode, and a drain electrode connected to the other end of the organic semiconducting layer on the second insulating layer.

Claims

1. An organic electroluminescent (EL) device comprising:

a substrate;

a transparent electrode formed on the substrate;

an organic light-emitting layer formed on the transparent electrode;

a metal electrode formed on the organic light-emitting layer;

a first insulating layer formed on the metal electrode;

a gate electrode formed on the first insulating layer;

a second insulating layer formed on the gate electrode;

an organic semiconducting layer formed on the second insulating layer;

a source electrode connected to one end of the organic semiconducting layer on the second insulating layer and connected to the metal electrode; and

a drain electrode connected to the other end of the organic semiconducting layer on the second insulating layer.

2. The organic EL device according to claim 1, wherein the substrate is a plastic, glass or crystalline substrate.

3. The organic EL device according to claim 1, wherein the transparent electrode includes indium tin oxide (ITO), indium zinc oxide (IZO) and aluminum zinc oxide (AZO).

4. The organic EL device according to claim 1, wherein the organic light-emitting layer includes an organic monomolecular component or an organic polymeric component.

5. The organic EL device according to claim 1, wherein the metal electrode includes at least one selected from the group consisting of aluminum (Al), magnesium (Mg), calcium (Ca), barium (Ba), lithium (Li), yttrium (Y), ytterbium (Yb), cesium (Cs) and silver (Ag).

6. The organic EL device according to claim 1, wherein the dielectric constant of the first insulating layer is relatively lower than that of the second insulating layer.

7. The organic EL device according to claim 1, wherein the gate electrode includes at least one selected from the group consisting of gold (Ag), palladium (Pd), silver (Ag), platinum (Pt), aluminum (Al), copper (Cu) and titanium (Ti).

8. The organic EL device according to claim 1, wherein the source electrode and the drain electrode include at least one selected from the group consisting of titanium (Ti), gold (Ag), palladium (Pd), chrome (Cr), platinum (Pt), aluminum (Al), calcium (Ca), barium (Ba), magnesium (Mg), silver (Ag), strontium (Sr) and lithium (Li).

9. The organic EL device according to claim 1, wherein the organic semiconducting layer is either an n-type or a p-type.

13. The organic EL device according to claim 1, wherein the insulating substrate is a glass or plastic substrate.

10. An organic EL device comprising:

a metal substrate having a first, bottom surface and a second, top surface;

an organic light-emitting layer formed on the first surface of the metal substrate;

a transparent electrode formed on the organic light-emitting layer;

a first insulating layer formed on the second surface of the metal substrate;

a gate electrode formed on the first insulating layer;

a second insulating layer formed on the gate electrode;

an organic semiconducting layer formed on the second insulating layer;

a source electrode connected to one end of the organic semiconducting layer on the second insulating layer and connected to the second surface of the metal substrate; and

a drain electrode connected to the other end of the organic semiconducting layer on the second insulating layer.

11. The organic EL device according to claim 10, wherein the metal substrate is formed of aluminum or stainless steel coated with one selected from the group consisting of Al, Ca, Sr, Y, Yb, Li and Mg.

12. An organic EL device comprising:

an insulating substrate having a first, bottom surface and a second, top surface;

a metal electrode formed on the first surface of the insulating substrate;

an organic light-emitting layer formed on the metal electrode;

a transparent electrode formed on the organic light-emitting layer;

a gate electrode formed on the second surface of the insulating substrate;

an insulating layer formed on the gate electrode;

an organic semiconducting layer formed on the insulating layer;

a source electrode connected to one end of the organic semiconducting layer on the insulating layer and connected to the metal substrate; and

a drain electrode connected to the other end of the organic semiconducting layer on the insulating layer.