Title:
ORGANIC ELECTROLUMINESCENT ELEMENT AND MANUFACTURING METHOD OF THE SAME
Document Type and Number:
Japanese Patent JP2004228002
Kind Code:
A
Abstract:
To solve problems that generally CuPc is used for a positive electrode buffer layer of an organic electroluminescent element and that the adhesiveness of a CuPc film with a hole transportation layer is poor because the CuPc film is formed by a vacuum evaporation method, and hole injection efficiency from a positive electrode can not be improved.
The positive electrode buffer layer is formed by using an organic polymer (as a suitable example, PEDOT is used) and only by spin-coating the organic polymer on the surface of a positive electrode. By this, the hole injection efficiency from a positive electrode is improved, and the maximum light emitting efficiency of the element becomes attainable.
Inventors:
NAITO HIROYOSHI
Application Number:
JP2003016405A
Publication Date:
August 12, 2004
Filing Date:
January 24, 2003
Export Citation:
Assignee:
JAPAN SCIENCE & TECH AGENCY
International Classes:
H01L51/50; H05B33/10; H05B33/14; H05B33/22; (IPC1-7): H05B33/22; H05B33/10; H05B33/14
Attorney, Agent or Firm:
Tomoyuki Takimoto