Organic light emitting element with insulation film and metal reflection film

• US 7,084,566 B2
• Filed: 06/15/2005
• Issued: 08/01/2006
• Est. Priority Date: 12/04/1996
• Status: Expired due to Fees

• Current Assignee: Hitachi, Ltd.
• Original Assignee: Hitachi, Ltd.
• Inventors: Nakayama, Takahiro, Shimada, Akira, Kobayashi, Shinya
• Primary Examiner(s): WILLIAMS, JOSEPH L
• Application Number:
  US11/152,254
• Publication Number:
  US 20050231104A1
• Time in Patent Office: 412 Days
• Field of Search: 313504-506, 428/690
• US Class Current: 313/506
• CPC Class Codes: H10K 50/11 characterised by the electroluminescent [EL] layers
• CPC Class Codes: H10K 50/841 Self-supporting sealing arrangements
• CPC Class Codes: H10K 50/85 Arrangements for extracting light from the devices
• CPC Class Codes: H10K 50/852 comprising a resonant cavity structure, e.g. Bragg reflector pair
• CPC Class Codes: H10K 50/856 comprising reflective means
• CPC Class Codes: H10K 59/872 Containers
• CPC Class Codes: H10K 59/875 Arrangements for extracting light from the devices
• CPC Class Codes: H10K 59/876 comprising a resonant cavity structure, e.g. Bragg reflector pair
• CPC Class Codes: H10K 59/878 comprising reflective means
• CPC Class Codes: H10K 85/324 comprising aluminium, e.g. Alq3
• CPC Class Codes: H10K 85/631 Amine compounds having at least two aryl rest on at least one amine-nitrogen atom, e.g. triphenylamine

Abstract

An organic light emitting element includes a transparent electrode, a light emitting layer and a metal electrode layer formed in that order. Further, a metal reflection film is formed on at least a side surface of the light emitting layer through an insulation film.

Claims

1. An organic light emitting element comprising a substrate, a translucent electrode, a transparent electrode, a hole transport layer, a light emitting layer and a metal electrode layer formed in that order, wherein a metal reflection film is formed on at least a side surface of the light emitting layer through an insulation film.

2. An organic light emitting element according to claim 1, wherein the at least a side surface of the light emitting layer is covered with the insulation film and the metal reflection film.