Title:
高効率の透明な有機発光装置
Document Type and Number:
Japanese Patent JP4846953
Kind Code:
B2
Abstract:
A highly transparent non-metallic cathode is disclosed that comprises a metal-doped organic electron injection layer that is in direct contact with a transparent non-metallic electron injecting cathode layer, such as indium tin oxide (ITO), wherein the metal-doped organic electron injection layer also functions as an exciton blocking or hole blocking layer. The metal-doped organic electron injection layer is created by diffusing an ultra-thin layer of about 5-10 Å of a highly electropositive metal such as Li throughout the layer. A representative embodiment of the highly transparent non-metallic cathode comprises a layer of ITO, a layer of 2,9-dimethyl-4,7-diphenyl-1,10-phenanthroline (BCP), which acts as an electron injection, exciton blocking, and hole blocking layer, and an ultra-thin layer of lithium, which degenerately dopes the layer of BCP, improving the electron injecting properties of the BCP layer. This cathode is demonstrated for use in an OLED having a transparency of about 90% or higher combined with a device external quantum efficiency of about 1% or higher.
Inventors:
Pulsa salsa, goutum
Chihaya Adachi
Burroughs, Paul, Yi
Forest, Stephen, Earl
Chihaya Adachi
Burroughs, Paul, Yi
Forest, Stephen, Earl
Application Number:
JP2001565709A
Publication Date:
December 28, 2011
Filing Date:
March 07, 2001
Export Citation:
Assignee:
The Trustees of Princeton University
International Classes:
H01L51/50; A61F7/00; A61F7/12; H01L51/52; H05B33/10; H05B33/28; A61B17/00; A61B17/22; A61B18/00; A61F2/958; A61M25/00; H01L51/00; H01L51/30
Domestic Patent References:
| JPH10162959A | 1998-06-19 | |||
| JPH10270171A | 1998-10-09 | |||
| JPH05331459A | 1993-12-14 | |||
| JPH11191489A | 1999-07-13 | |||
| JPH11354280A | 1999-12-24 | |||
| JP2000058265A | 2000-02-25 |
Attorney, Agent or Firm:
Masatake Shiga
Takashi Watanabe
Yasuhiko Murayama
Shinya Mitsuhiro
Takashi Watanabe
Yasuhiko Murayama
Shinya Mitsuhiro