Title:
ORGANIC EL ELEMENT
Document Type and Number:
WIPO Patent Application WO/2011/021343
Kind Code:
A1
Abstract:
Provided is an organic EL element which withstands processes for mass-producing organic EL display panels, achieves excellent hole-injection efficiency, is driven at a low voltage, and has high luminance efficiency. Specifically, an organic EL element (1) is formed by sequentially laminating an anode (2), a hole injection layer (3), a buffer layer (4), an emission layer (5) and a cathode (6) on one surface of a substrate (10). On the surface of the hole injection layer (3), a bank (12) is formed in such a manner as to surround a structure corresponding to layers including and above the buffer layer (4). The hole injection layer (3) is formed by sputter-depositing a thin film of tungsten oxide. In the sputter-deposition, the film is formed so that tungsten oxide may have an electronic state in which the occupied level is within a range of binding energies that is lower by 1.8 - 3.6 eV than the lowest binding energy in the valence band thereof. Thus, the barrier for hole injection into the above buffer layer is lowered.
Inventors:
OHUCHI SATORU
TSUKAMOTO YOSHIAKI
KOMATSU TAKAHIRO
SAKANOUE KEI
TSUKAMOTO YOSHIAKI
KOMATSU TAKAHIRO
SAKANOUE KEI
Application Number:
PCT/JP2010/004471
Publication Date:
February 24, 2011
Filing Date:
July 09, 2010
Export Citation:
Assignee:
PANASONIC CORP (JP)
OHUCHI SATORU
TSUKAMOTO YOSHIAKI
KOMATSU TAKAHIRO
SAKANOUE KEI
OHUCHI SATORU
TSUKAMOTO YOSHIAKI
KOMATSU TAKAHIRO
SAKANOUE KEI
International Classes:
H01L51/50; G09F9/30; H01L27/32; H05B33/10
Foreign References:
| JP2000223276A | 2000-08-11 | |||
| JP2006114928A | 2006-04-27 | |||
| JP2008124268A | 2008-05-29 | |||
| JP2008053556A | 2008-03-06 | |||
| JP2004527093A | 2004-09-02 | |||
| JP2004228355A | 2004-08-12 |
Other References:
LEE, H. ET AL.: "The origin of the hole injection improvements at indium tin oxide/molybdenum trioxide/N,N'-bis(1-naphthyl)-N,N'-diphenyl- 1,1'-biphenyl-4,4'-diamine interface", APPLIED PHYSICS LETTERS, vol. 93, 2008, pages 043308 - 1
KOIZUMI ET AL.: "alpha-NPD/Mo03 Kaimen ni Okeru Denshi Kozo", DAI 56 KAI EXTENDED ABSTRACTS JAPAN SOCIETY OF APPLIED PHYSICS AND RELATED SOCIETIES, 2 April 2009 (2009-04-02), pages 1279
KOIZUMI ET AL.: "alpha-NPD/Mo03 Kaimen ni Okeru Denshi Kozo", DAI 56 KAI EXTENDED ABSTRACTS JAPAN SOCIETY OF APPLIED PHYSICS AND RELATED SOCIETIES, 2 April 2009 (2009-04-02), pages 1279
Attorney, Agent or Firm:
NAKAJIMA, Shiro et al. (JP)
Shiro Nakajima (JP)
Shiro Nakajima (JP)
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