Organic light emitting diode display and manufacturing method thereof

• US 9,666,658 B2
• Filed: 09/18/2015
• Issued: 05/30/2017
• Est. Priority Date: 01/05/2015
• Status: Active Grant

• Current Assignee: Samsung Display Company Limited (Samsung Electronics Co. Ltd.)
• Original Assignee: Samsung Display Company Limited (Samsung Electronics Co. Ltd.)
• Inventors: Yoo, Hee jun, Moon, Jeong Woo, Yoon, Joo Sun
• Primary Examiner(s): Dang, Phuc
• Application Number:
  US14/858,126
• Publication Number:
  US 20160197126A1
• Time in Patent Office: 620 Days
• CPC Class Codes: H10K 2102/3031 Two-side emission, e.g. transparent OLEDs [TOLED]
• CPC Class Codes: H10K 59/173 comprising banks or shadow masks
• CPC Class Codes: H10K 59/179 Interconnections, e.g. wiring lines or terminals
• CPC Class Codes: H10K 59/80521 characterised by their shape

Abstract

Disclosed is an organic light emitting diode (OLED) display including an organic light emitting diode (OLED) display including an insulation substrate and a first electrode disposed on the insulation substrate. A pixel defining layer surrounds the first electrode. The pixel defining layer forms a pixel area on the first electrode. An organic emission layer is disposed on the first electrode in the pixel area. An electrode connecting portion is disposed on the pixel defining layer. A second electrode is disposed on the organic emission layer. The second electrode is connected to the electrode connecting portion.

Claims

1. An organic light emitting diode (OLED) display comprising:

an insulation substrate;

a first electrode disposed on the insulation substrate;

a pixel defining layer surrounding the first electrode, wherein the pixel defining layer forms a pixel area on the first electrode;

an organic emission layer disposed on the first electrode in the pixel area;

an electrode connecting portion disposed on the pixel defining layer; and

a second electrode disposed on the organic emission layer and the pixel defining layer, wherein the second electrode is connected to the electrode connecting portion, and wherein the second electrode is not disposed under the electrode connecting portion.

2. The OLED display of claim 1, wherein the first electrode is an anode, and the second electrode is a cathode.

3. The OLED display of claim 2, wherein the first electrode includes at least one of indium tin oxide (ITO), a triple layer of ITO/Ag/ITO, PEDOT (poly(3,4-ethylenedioxythiophene)), and a conductive organic material, and the second electrode includes at least one of MgAg, AgYb, Mg, Al, and Ag nanowires.

4. The OLED display of claim 3, wherein the electrode connecting portion includes at least one of a dual layer of Ca/Al, LiAl, MgAg, LiF/Al, CsF/Al, BaF2/Al, a triple layer of LiF/Ca/Al, and Cs, K, Ba, Yb, Li, Ca, Mg, Al, Ag, Cu, Ni, Pd, Au, or Pt.

5. The OLED display of claim 4, wherein the pixel defining layer has a thickness of from 1 um to about 4 um, and wherein the pixel defining layer includes a light transmissive or non-transmissive organic material.

6. The OLED display of claim 1, wherein the first electrode is a cathode, and the second electrode is an anode.

7. The OLED display of claim 6, wherein the second electrode includes at least one of indium tin oxide (ITO), a triple layer of ITO/Ag/ITO, PEDOT (poly(3,4-ethylenedioxythiophene)), and a conductive organic material, and the first electrode includes at least one of MgAg, AgYb, Mg, Al, and Ag nanowires.

8. The OLED display of claim 7, wherein the electrode connecting portion includes at least one of indium tin oxide (ITO), a triple layer of ITO/Ag/ITO, PEDOT (poly(3,4-ethylenedioxythiophene)), and a conductive organic material.

9. The OLED display of claim 8, wherein the pixel defining layer has a thickness of from 1 um to about 4 um, and wherein the pixel defining layer includes a light transmissive organic material.

10. A manufacturing method of an OLED display comprising:

forming a first electrode on an insulation substrate;

forming a pixel defining layer to surround the first electrode, wherein the pixel defining layer forms a pixel area on the first electrode;

forming an organic emission layer on the first electrode in the pixel area;

forming an electrode connecting portion on the pixel defining layer; and

forming a second electrode on the organic emission layer and the pixel defining layer, wherein the second electrode is connected to the electrode connecting portion, and wherein the second electrode is not disposed under the electrode connecting portion.

11. The method of claim 10, wherein the first electrode is includes at least one of indium tin oxide (ITO), a triple layer of ITO/Ag/ITO, PEDOT (poly(3,4-ethylenedioxythiophene)), and a conductive organic material, and the second electrode includes at least one of MgAg, AgYb, Mg, Al, and Ag nanowires.

12. The method of claim 11, wherein the electrode connecting portion includes at least one of a dual layer of Ca/Al, LiAl, MgAg, LiF/Al, CsF/Al, or BaF2/Al, a triple layer of LiF/Ca/Al, and Cs, K, Ba, Yb, Li, Ca, Mg, Al, Ag, Cu, Ni, Pd, Au, or Pt.

13. The method of claim 12, wherein the pixel defining layer includes a light transmissive or non-transmissive organic material, and wherein the pixel defining layer has a thickness of from 1 um to about 4 um.

14. The method of claim 10, wherein the second electrode includes at least one of indium tin oxide (ITO), a triple layer of ITO/Ag/ITO, PEDOT (poly(3,4-ethylenedioxythiophene)), and a conductive organic material, and the first electrode includes at least one of MgAg, AgYb, Mg, Al, and Ag nanowires.

15. The method of claim 14, wherein the electrode connecting portion includes at least one of a dual layer of Ca/Al, LiAl, MgAg, LiF/Al, CsF/Al, or BaF2/Al, a triple layer of LiF/Ca/Al, and Cs, K, Ba, Yb, Li, Ca, Mg, Al, Ag, Cu, Ni, Pd, Au, or Pt.

16. The method of claim 15, wherein the pixel defining layer includes a light transmissive organic material, and wherein the pixel defining layer has a thickness of from 1 um to about 4 um.

17. An organic light emitting diode (OLED) display comprising:

an insulation substrate;

a first electrode disposed on a first portion of the insulation substrate;

a pixel defining layer surrounding a second portion of the insulation substrate and a first portion of the first electrode, wherein the pixel defining layer exposes a second portion of the first electrode;

an organic emission layer disposed on the exposed second portion of the first electrode;

an electrode connecting portion disposed on the pixel defining layer; and

a second electrode disposed on the organic emission layer and the pixel defining layer, wherein the second electrode is connected to the electrode connecting portion, and wherein the second electrode is not disposed under the electrode connecting portion.

18. The OLED display of claim 17, wherein the pixel defining layer comprises first and second sloped sides, and wherein the organic emission layer and the second electrode are disposed on the first and second sloped sides of the pixel defining layer.