TRANSPARENT ELECTRODE

• US 20110171445A1
• Filed: 09/22/2009
• Published: 07/14/2011
• Est. Priority Date: 09/23/2008
• Status: Abandoned Application

• Current Assignee: Kolon Industries Incorporated
• Original Assignee: Kolon Industries Incorporated
• Inventors: Song, Sang Min, Park, Hyo Jun, Kim, Jeong Han, Jung, Hak Gee
• Application Number:
  US13/120,033
• Publication Number:
  US 20110171445A1
• Time in Patent Office: Days
• US Class Current: 428/216
• CPC Class Codes: H01B 1/20 Conductive material dispersed in non-conductive organic material organic macromolecular compounds or compositions C08
• CPC Class Codes: H01B 1/24 the conductive material comprising carbon-silicon compounds, carbon or silicon
• CPC Class Codes: H01J 2211/225 Material of electrodes
• CPC Class Codes: H05B 33/28 of translucent electrodes
• CPC Class Codes: H10K 2101/00 Properties of the organic materials covered by group H10K85/00
• CPC Class Codes: H10K 50/81 Anodes
• CPC Class Codes: Y10T 428/24975 No layer or component greater than 5 mils thick

Abstract

Disclosed herein is a transparent electrode, including: a polyimide film having an average linear thermal expansion coefficient of 50.0 ppm/° C. or less, which is measured by thermo-mechanical analysis based on a film thickness of 50˜100 μm at a temperature of 50˜250° C., and a yellowness of 15 or less; and an electrode layer including a conductive material and a polyimide resin having an average linear thermal expansion coefficient of 50.0 ppm/° C. or less, which is measured by thermo-mechanical analysis based on a film thickness of 50˜100 μm at a temperature of 50˜250° C., and a yellowness of 15 or less. The transparent electrode is advantageous in that a problem of a short circuit does not occur even when apparatuses including this transparent electrode are over-heated because it has excellent heat resistance, and in that it is transparent and has high electroconductivity.

Claims

1. A transparent electrode, comprising:

a polyimide film having an average linear thermal expansion coefficient of 50.0 ppm/°

C. or less, which is measured by thermo-mechanical analysis based on a film thickness of 50˜

100 μ

m at a temperature of 50˜

250°

C., and a yellow index of 15 or less; and

an electrode layer including a conductive material and a polyimide resin having an average linear thermal expansion coefficient of 50.0 ppm/°

C. or less, which is measured by thermo-mechanical analysis based on a film thickness of 50-100 μ

m at a temperature of 50-250°

C., and a yellow index of 15 or less.

2. The transparent electrode according to claim 1, wherein the electrode layer is formed by dispersing the conductive material in the polyimide resin or dispersing the conductive material on a polyimide resin layer.

3. The transparent electrode according to claim 1, wherein the polyimide film has an L value of 90 or more, a value of 5 or less and a b value of 5 or less when its chromatic coordinates are measured using a UV spectrometer based on a film thickness of 50-100 μ

m.

4. The transparent electrode according to claim 1, wherein the conductive material includes carbon nanotubes, indium tin oxide (ITO) powder or indium zinc oxide (IZO) powder.

5. The transparent electrode according to claim 1, wherein the electrode layer is composed of varnish including 0.001-1 parts by weight of carbon nanotubes based on 100 parts by weight of a solid content of the polyimide resin.

6. The transparent electrode according to claim 1, wherein the electrode layer is composed of varnish including 2-100 parts by weight of ITO powder or IZO powder based on 100 parts by weight of a solid content of the polyimide resin.

7. The transparent electrode according to claim 6, wherein the ITO powder includes 80-95 wt % of indium oxide and 5-20 wt % of tin oxide.

8. The transparent electrode according to claim 1, wherein the electrode layer has a thickness of 10 nm-25 μ

m.

9. The transparent electrode according to claim 1, wherein the transparent electrode has a transmissivity of 60% or more at 500 nm.

10. The transparent electrode according to claim 4, wherein the electrode layer is composed of varnish including 0.001-1 parts by weight of carbon nanotubes based on 100 parts by weight of a solid content of the polyimide resin.

11. The transparent electrode according to claim 4, wherein the electrode layer is composed of varnish including 2-100 parts by weight of ITO powder or IZO powder based on 100 parts by weight of a solid content of the polyimide resin.

12. The transparent electrode according to claim 11, wherein the ITO powder includes 80-95 wt % of indium oxide and 5-20 wt % of tin oxide.

13. The transparent electrode according to claim 4, wherein the electrode layer has a thickness of 10 nm-25 μ

m.

14. The transparent electrode according to claim 4, wherein the transparent electrode has a transmissivity of 60% or more at 500 nm.