Organic electroluminescence element and method for manufacturing thereof

• US 8,022,437 B2
• Filed: 07/02/2009
• Issued: 09/20/2011
• Est. Priority Date: 09/26/2008
• Status: Expired due to Fees

• Current Assignee: Toppan Printing Co., Ltd. (TOPPAN Holdings, Inc.)
• Original Assignee: Toppan Printing Co., Ltd. (TOPPAN Holdings, Inc.)
• Inventors: Koyama, Hiroaki
• Primary Examiner(s): NGO, NGAN V
• Application Number:
  US12/497,413
• Publication Number:
  US 20100078665A1
• Time in Patent Office: 810 Days
• Field of Search: 257/40, 257/79, 257/93, 257/100, 257/E33.059, 257/E33.061, 313/504, 438/26
• US Class Current: 257/100
• CPC Class Codes: H10K 50/8426 Peripheral sealing arrangements, e.g. adhesives, sealants
• CPC Class Codes: H10K 50/844 Encapsulations

Abstract

One embodiment of the present invention is an organic electroluminescence element having a substrate, a first electrode formed on the substrate, an organic luminescent medium layer which includes an organic luminescent layer and is formed on the first electrode, a second electrode formed on the organic luminescent medium layer and arranged so as to face the first electrode, a first passivation layer formed on the second electrode, an adhesive layer adhered to the substrate and formed so as to cover the first electrode, the organic luminescent medium layer, the second electrode and the first passivation layer, a sealing substrate formed on the adhesive layer and a second passivation layer formed so as to entirely cover the adhesive layer, the sealing substrate and an upper surface of an exposure part of the substrate.

Claims

1. An organic electroluminescence element comprising:

a substrate;

a first electrode formed on said substrate;

an organic luminescent medium layer which includes an organic luminescent layer formed on said first electrode;

a second electrode formed on said organic luminescent medium layer and arranged so as to face said first electrode;

a first passivation layer formed on said second electrode;

an adhesive layer adhered to said substrate and formed so as to cover said first electrode, said organic luminescent medium layer, said second electrode and said first passivation layer;

a sealing substrate formed on said adhesive layer; and

a second passivation layer continuously formed so as to entirely cover said adhesive layer, said sealing substrate and an upper surface of an exposure part of said substrate.

2. The organic electroluminescence element according to claim 1, wherein said sealing substrate has a flat sheet structure.

3. The organic electroluminescence element according to claim 1, wherein said first passivation layer includes one of metal oxide, metal nitride, metal oxynitride and metal fluoride.

4. The organic electroluminescence element according to claim 1, wherein said second passivation layer includes silicon nitride or silicon oxynitride.

5. The organic electroluminescence element according to claim 1, further comprising a third passivation layer formed between said sealing substrate and said adhesive layer, and wherein said sealing substrate is made of a plastic film.

6. A method for manufacturing an organic electroluminescence element comprising:

preparing a substrate;

forming a first electrode on said substrate;

forming an organic luminescent medium layer which includes an organic luminescent layer on said first electrode;

forming a second electrode so as to face said first electrode and forming said organic luminescent medium layer between said first electrode and said second electrode;

forming a first passivation layer on said second electrode;

forming an adhesive layer so as to be adhered to said substrate and cover said first electrode, said organic luminescent medium layer, said second electrode and said first passivation layer;

forming a sealing substrate on said adhesive layer, and

forming a second passivation layer so as to entirely cover said adhesive layer, said sealing substrate and an upper surface of an exposure part of said substrate.

7. The method for manufacturing an organic electroluminescence element according to claim 6, wherein said sealing substrate has a flat sheet structure.

8. The method for manufacturing an organic electroluminescence element according to claim 6, wherein said first passivation layer includes one of metal oxide, metal nitride, metal oxynitride and metal fluoride.

9. The method for manufacturing an organic electroluminescence element according to claim 6, further comprising forming said second passivation layer by a CVD method.

10. The method for manufacturing an organic electroluminescence element according to claim 6, wherein said sealing substrate is a plastic film having a third passivation layer on at least one side of the plastic film and wherein said adhesive layer is adhered to said one side of said plastic film where said third passivation layer is formed.