Organic luminescence device with anti-reflection layer and organic luminescence device package

• US 7,332,859 B2
• Filed: 09/22/2005
• Issued: 02/19/2008
• Est. Priority Date: 04/09/2002
• Status: Expired due to Term

• Current Assignee: Canon Kabushiki Kaisha (Canon Inc.)
• Original Assignee: Canon Kabushiki Kaisha (Canon Inc.)
• Inventors: Hasegawa, Toshinori, Hoshi, Hikaru, Kobayashi, Shuichi
• Primary Examiner(s): Patel; Nimeshkumar D.
• Assistant Examiner(s): QUARTERMAN, KEVIN J
• Application Number:
  US11/231,851
• Publication Number:
  US 20060017374A1
• Time in Patent Office: 880 Days
• Field of Search: 313/498, 313/501, 313/504, 313/506, 313/112, 313/609
• US Class Current: 313/504
• CPC Class Codes: H10K 2102/3026 Top emission
• CPC Class Codes: H10K 50/841 Self-supporting sealing arrangements
• CPC Class Codes: H10K 50/844 Encapsulations
• CPC Class Codes: H10K 50/85 Arrangements for extracting light from the devices
• CPC Class Codes: H10K 50/86 Arrangements for improving contrast, e.g. preventing reflection of ambient light
• CPC Class Codes: H10K 50/865 comprising light absorbing layers, e.g. light-blocking layers
• CPC Class Codes: H10K 59/12 Active-matrix OLED [AMOLED] displays

Abstract

For realizing an organic luminescence device of a high efficiency, the present invention provides an organic luminescence device having an anti-reflection film on a transparent electrode or on a moisture prevention layer.

Claims

1. A top-emission organic luminescence device having a light-emitting layer comprising:

(a) a pair of mutually opposed electrodes, wherein said pair of electrodes are a first electrode provided on a substrate and a transparent second electrode disposed farther from said substrate than said first electrode;

(b) an anti-reflection layer provided on said transparent second electrode and in contact therewith at an interface therebetween, wherein the anti-reflection layer has a refractive index less than the transparent second electrode, and a side of the anti-reflection layer opposite to the interface is in contact with an external environment, and the thickness of said anti-reflection layer satisfies the following equation;

d=λ

/4n

where d represents the thickness of said anti-reflection layer, λ

represents a wavelength of light emitted from the light-emitting layer, and n represents the refractive index of said anti-reflection layer and

(c) an organic light-emitting layer formed between said pair of electrodes, wherein the reflection of the light emitted from the light-emitting layer at the interface of the side of the transparent second electrode opposite to the organic light emitting layer is prevented by said anti-reflection layer.

2. The organic luminescence device according to claim 1, wherein said first electrode provided on the substrate side is capable of intercepting external light and preventing reflection of external light.

3. The organic luminescence device according to claim 1, wherein the anti-reflection layer is a single layer.

4. The organic luminescence device according to claim 1, wherein the anti-reflection layer is multi-layers.

5. The top-emission organic luminescence device according to claim 1, wherein said transparent second electrode is composed of indium tin oxide.

6. A top-emission organic luminescence device comprising:

(a) a pair of mutually opposed electrodes, wherein said pair of electrodes are a first electrode provided on a substrate and a transparent second electrode, disposed farther from the substrate than said first electrode;

(b) a moisture prevention layer provided on said transparent second electrode;

(c) an anti-reflection layer provided on said moisture prevention layer forming an interface therebetween, wherein a side of the anti-reflection layer opposite to the interface is in contact with an external environment, and the thickness of said anti-reflection layer satisfies the following equation;

d=λ

/4n

where d represents the thickness of said anti-reflection layer, λ

represents a wavelength of light emitted from the light-emitting layer, and n represents the refractive index of said anti-reflection layer; and

(d) a light-emitting organic layer formed between said pair of electrodes, whereby emitted light is transmitted through the transparent second electrode to the external environment;

wherein the reflection of the light emitted from the light-emitting layer at the interface of the side of the moisture prevention layer opposite to the transparent second electrode is prevented by said anti-reflection layer.

7. The organic luminescence device according to claim 6, wherein said first electrode provided on the substrate side is capable of intercepting external light and preventing reflection of external light.

8. The organic luminescence device according to claim 6, wherein the anti-reflection layer has a refractive index less than the moisture prevention layer.

9. The organic luminescence device according to claim 6, wherein the anti-reflection layer is a single layer.

10. The organic luminescence device e according to claim 6, wherein the anti-reflection layer is multi-layers.

11. The top-emission organic luminescence device according to claim 6, wherein said transparent second electrode is composed of indium tin oxide.

12. The top-emission organic luminescence device according to claim 6, wherein said moisture prevention layer is composed of SiN.

13. A top-emission organic luminescence device comprising in this order:

(a) a substrate;

(b) a first electrode;

(c) a light-emitting organic layer;

(d) a transparent second electrode;

(e) a layer of silicon nitride;

(f) a layer of silicon oxide provided on the layer of silicon nitride and in contact therewith at an interface therebetween, wherein a side of the layer of silicon oxide opposite to the interface is in contact with an external environment.