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

外国特許コード F190009870
整理番号 J1014-22US2
掲載日 2019年7月29日
出願国 アメリカ合衆国
出願番号 201816169078
公報番号 20190058142
出願日 平成30年10月24日(2018.10.24)
公報発行日 平成31年2月21日(2019.2.21)
優先権データ
  • 特願2014-190364 (2014.9.18) JP
  • 2015JP76346 (2015.9.16) WO
  • 201715460455 (2017.3.16) US
発明の名称 (英語) Thin film of metal oxide, organic electroluminescent device including thin film, photovoltaic cell including thin film, and manufacturing method of thin film NEW
発明の概要(英語) 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 %.
従来技術、競合技術の概要(英語) 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.
特許請求の範囲(英語) [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)
  • 発明者/出願人(英語)
  • HOSONO Hideo
  • TODA Yoshitake
  • WATANABE Satoru
  • WATANABE Toshinari
  • ITO Kazuhiro
  • MIYAKAWA Naomichi
  • NAKAMURA Nobuhiro
  • AGC
  • JAPAN SCIENCE AND TECHNOLOGY AGENCY
  • TOKYO INSTITUTE OF TECHNOLOGY
国際特許分類(IPC)
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