Top > Search of International Patents > Thin film of metal oxide, organic electroluminescent device including thin film, photovoltaic cell including thin film, and manufacturing method of thin film

Thin film of metal oxide, organic electroluminescent device including thin film, photovoltaic cell including thin film, and manufacturing method of thin film

Foreign code F190009870
File No. J1014-22US2
Posted date Jul 29, 2019
Country United States of America
Application number 201816169078
Gazette No. 20190058142
Date of filing Oct 24, 2018
Gazette Date Feb 21, 2019
Priority data
  • P2014-190364 (Sep 18, 2014) JP
  • 2015JP76346 (Sep 16, 2015) WO
  • 201715460455 (Mar 16, 2017) US
Title Thin film of metal oxide, organic electroluminescent device including thin film, photovoltaic cell including thin film, and manufacturing method of thin film
Abstract A thin film of metal oxide includes zinc (Zn); tin (Sn); silicon (Si); and oxygen (O). In terms of oxide, based on 100 mol % of total of oxides of the thin film, SnO2 is greater than 15 mol % but less than or equal to 95 mol %.
Outline of related art and contending technology BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to a thin film of metal oxide, an organic electroluminescent device including the thin film, a photovoltaic cell including the thin film, a photovoltaic cell including the thin film, and a manufacturing method of the thin film.
2. Description of the Related Art
Photoelectric conversion devices such as organic electroluminescent devices, photovoltaic cells or the like are widely developed. For example, organic electroluminescent devices are widely used for displays, backlights, illuminations and the like.
Generally, an organic electroluminescent device includes two electrodes (an anode and a cathode) and an organic light emitting layer provided between these electrodes. When applying a voltage between the electrodes, holes and electrons are injected into the organic light emitting layer from the respective electrodes. When the holes and the electrons are recombined in the organic light emitting layer, binding energy is generated to excite organic luminescent materials in the organic light emitting layer. As light emissions occur when the excited luminescent materials return to the ground state, a luminescent device is obtained by using this phenomenon.
Here, generally, the organic electroluminescent device further includes a hole injection layer and/or a hole transport layer, and an electron injection layer and/or an electron transport layer. The hole injection layer and the hole transport layer are provided between the anode and the organic light emitting layer, and have a function to selectively inject holes into the organic light emitting layer. Further, the electron injection layer and the electron transport layer are provided between the cathode and the organic light emitting layer, and have a function to selectively inject electrons into the organic light emitting layer (See Japanese Unexamined Patent Application Publication No. 2001-176667). It is known that luminous efficiency of the organic electroluminescent device is increased by providing such layers.
Further, a general photovoltaic cell includes a pair of electrodes and a photoelectric conversion layer provided between the electrodes. In accordance with the injection of light, holes and electrons are generated in the photoelectric conversion layer. When these holes and electrons are, respectively, extracted from an electrode for extracting the holes and from an electrode for extracting the electrons electric power is generated. Further, when the photovoltaic cell functions as a photodetector, light is converted to an electric signal at the photoelectric conversion layer and the light is detected.
It is preferable for the photovoltaic cell as well that an n-type semiconductor layer, referred to as a buffer layer, is provided between the electrode on the side where electrons are extracted and the photoelectric conversion layer. By providing this layer conversion efficiency of the photovoltaic cell can be increased.
Scope of claims [claim1-3]
1.-3. (canceled)

[claim4]
4. An organic electroluminescent device, comprising at least one layer selected from the group consisting of an electron injection layer and a hole blocking layer, wherein:
the at least one layer is a thin film of metal oxide comprising zinc (Zn), tin (Sn), and oxygen (O); and
in terms of oxide, based on 100 mol % of total of oxides of the thin film, SnO2 is present in the thin film in an amount of greater than 15 mol % but less than or equal to 95 mol %.

[claim5]
5. The organic electroluminescent device according to claim 4, wherein the thin film comprises silicon (Si).

[claim6]
6. The organic electroluminescent device according to claim 5, wherein in terms of oxide, based on 100 mol % of total of the oxides of the thin film, SiO2 is present in the thin film in an amount of greater than or equal to 7 mol % but less than or equal to 30 mol %.

[claim7]
7. The organic electroluminescent device according to claim 4, wherein the thin film is substantially free of silicon (Si).

[claim8]
8. The organic electroluminescent device according to claim 4, wherein a thickness of the thin film is greater than or equal to 10 nm but less than or equal to 2000 nm.

[claim9-15]
9.-15. (canceled)
  • Inventor, and Inventor/Applicant
  • HOSONO Hideo
  • TODA Yoshitake
  • WATANABE Satoru
  • WATANABE Toshinari
  • ITO Kazuhiro
  • MIYAKAWA Naomichi
  • NAKAMURA Nobuhiro
  • AGC
  • JAPAN SCIENCE AND TECHNOLOGY AGENCY
  • TOKYO INSTITUTE OF TECHNOLOGY
IPC(International Patent Classification)
Please contact us by E-mail or facsimile if you have any interests on this patent.

PAGE TOP

close
close
close
close
close
close