Title:
ORGANIC THIN FILM ELECTROLUMINESCENT ELEMENT AND MANUFACTURE THEREOF
Document Type and Number:
Japanese Patent JP2760347
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To stabilize an element characteristic, and improve cross talk by forming a lower side metallic electrode to contact an organic thin film out of a material having a small work function, and forming an outer peripheral part to surround it out of a material having a large work function.
SOLUTION: A transparent electrode 2 by transparent metal is formed on a main surface of a glass substrate 1, and an organic thin film 3 composed of an electron hole transport layer, a light emitting layer and an electron transport layer is formed in its upper part. For example, local metal 4 using a material having a small work function such as lithium or aluminium to which lithium is added, is formed in an upper part of the organic thin film 3, and a metallic electrode 5 larger in size than the local electrode 4 is superposed on it. Since the metallic electrode 5 is formed of, for example, a metallic material larger having a larger work function such as aluminium than the local electrode 4, a light emitting element characteristic is stabilized, and cross talk between elements can be remedied.
Inventors:
KUSAKA TERUO
TANAKA TAIZO
TANAKA TAIZO
Application Number:
JP25718596A
Publication Date:
May 28, 1998
Filing Date:
September 27, 1996
Export Citation:
Assignee:
NIPPON DENKI KK
International Classes:
H05B33/10; H01L51/50; H01L51/52; H05B33/12; H05B33/26; H01L27/32; (IPC1-7): H05B33/26; H05B33/10
Domestic Patent References:
| JP46795A | ||||
| JP3141588A |
Attorney, Agent or Firm:
Naoki Kyomoto (2 outside)
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