Light-emitting device having a planarized color filter

• US 7,800,298 B2
• Filed: 01/11/2008
• Issued: 09/21/2010
• Est. Priority Date: 05/12/2004
• Status: Active Grant

• Current Assignee: InnoLux Corporation
• Original Assignee: TPO Displays Corporation (InnoLux Corporation)
• Inventors: Chang, Shih-Chang, Hsieh, Hsiu-Chun, Tsai, Yaw-Ming
• Primary Examiner(s): Williams; Joseph L
• Application Number:
  US12/008,530
• Publication Number:
  US 20080129196A1
• Time in Patent Office: 984 Days
• Field of Search: 313498-512
• US Class Current: 313/504
• CPC Class Codes: H10K 59/12 Active-matrix OLED [AMOLED] displays
• CPC Class Codes: H10K 59/38 comprising colour filters or colour changing media [CCM]
• CPC Class Codes: H10K 71/00 Manufacture or treatment specially adapted for the organic devices covered by this subclass

Abstract

A light-emitting device and the fabrication method thereof. A substrate is provided. A plurality of active elements are formed on the substrate, defining a plurality of pixel areas. A color filter is formed on the pixel areas. The surface of the color filter is planarized to reduce roughness. An electrode is formed on the color filter. An light-emitting layer is formed on the electrode. A second electrode is formed on the light-emitting layer.

Claims

1. An organic light-emitting device, comprising:

a substrate;

a color filter disposed on the substrate, wherein the color filter has a surface roughness (Ra) less than 10 nm;

a first electrode contacting the color filter, wherein the first electrode has a surface roughness (Ra) less than 10 nm;

an organic light-emitting layer disposed on the first electrode; and

a second electrode disposed on the organic light-emitting layer.

2. The organic light-emitting device as claimed in claim 1, wherein the electrode, the organic light-emitting layer and the second electrode comprise a monochromatic organic light-emitting device.

3. The organic light-emitting device as claimed in claim 2, wherein the monochromatic organic light-emitting device is a white-light organic light-emitting device.

4. The organic light-emitting device as claimed in claim 1, wherein the first electrode comprises an indium tin oxide (ITO) electrode, indium zinc oxide (IZO) electrode or a metal oxide.

5. The organic light-emitting device as claimed in claim 1, wherein the color filter is formed by an excimer UV treatment, a corona treatment, O2 plasma treatment, or polishing.

6. An electronic device including the organic light emitting device of claim 1.

7. A light-emitting device, comprising:

a substrate;

a color filter on the substrate, the color filter having a planarized surface; and

a first electrode contacting the planarized surface of the color filter.

8. The light emitting device of claim 7, wherein the planarized surface of the color filter has a surface roughness (Ra) less than 10 nm.

9. The light emitting device of claim 7, wherein the planarized surface of the color filter is planarized by UV treatment, O2 plasma treatment, or polishing.

10. The light emitting layer of claim 9, wherein the O2 plasma treatment includes exposing the color filter to Ar, O2 or H2O before the first electrode is f formed on the color filter.

11. The light emitting device of claim 7, wherein the first electrode comprises a planarized surface.

12. The light emitting device of claim 11, wherein the planarized surface of the first electrode is planarized by UV treatment, O2 plasma treatment, or polishing.

13. The light emitting device of claim 7, further comprising:

an organic light-emitting layer on the first electrode; and

a second electrode on the organic light-emitting layer.

14. The light emitting device of claim 13, wherein the first electrode, the organic light-emitting layer and the second electrode comprise a monochromatic organic light-emitting diode.

15. The light emitting device of claim 13, wherein the organic light-emitting layer is a stacked layer comprising an electron-injecting layer, an electron-transport layer, a light-emitting layer, a hole-transport layer, and a hole-injecting layer.

16. The light emitting layer of claim 13, wherein the second electrode comprises a conductive material including one of Ca, Al, Mg, MgAg, AlLi or a combination thereof.

17. The light emitting layer of claim 13, further comprising active elements on the substrate, wherein the active elements comprise at least one of an amorphous-Si thin-film transistor and a poly-Si thin-film transistor.

18. The light emitting layer of claim 7, wherein the first electrode comprises a transparent conductive material including indium tin oxide (ITO) or indium zinc oxide (IZO).

19. The light emitting device of claim 7, wherein the light emitting device is an organic light emitting device.

20. An electronic device including the light emitting device of claim 7.