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Realization of wide bandgap p-type oxide semiconductor by mist CVD method and device application

Research Project

Project/Area Number 18K13788
Research Category

Grant-in-Aid for Early-Career Scientists

Allocation TypeMulti-year Fund
Review Section Basic Section 21050:Electric and electronic materials-related
Research InstitutionKyoto University

Principal Investigator

IKENOUE Takumi  京都大学, エネルギー科学研究科, 助教 (00633538)

Project Period (FY) 2018-04-01 – 2020-03-31
Project Status Completed (Fiscal Year 2019)
Budget Amount *help
¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000)
Fiscal Year 2019: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2018: ¥2,990,000 (Direct Cost: ¥2,300,000、Indirect Cost: ¥690,000)
Keywordsワイドバンドギャップ半導体 / p型酸化物半導体 / 酸化ニッケル / ミストCVD法 / p型ワイドギャップ半導体 / NiMgO / p型 / 酸化物 / ワイドバンドギャップ
Outline of Final Research Achievements

In this project, we focus on nickel oxide (NiO) as a p-type oxide semiconductor that is indispensable for next-generation power device applications, and performed thin film growth via the mist CVD method that enables high-quality film growth. As a result, high quality NiO thin films were grown on α-Al2O3 and MgO substrates. In addition, we tried p-type Li doping and realized carrier concentration control over a wide range.
Next, with a view to device application, NiO:Li (100) was grown on a β-Ga2O3 (100) substrate, and the growth conditions of single crystal NiO:Li without twin formation were found. Heterojunction diode with high rectification ratio and dielectric breakdown voltage was prototyped.

Academic Significance and Societal Importance of the Research Achievements

本研究は、SiCやGaNを超えたパワーデバイスを実現できる可能性のあるワイドバンドギャップ酸化物半導体の中でも稀少なp型伝導を示すNiOの高品質な結晶成長技術を確立した。特にLiをドーパントとして広範なキャリア濃度制御を実現したことは、デバイス応用研究を加速させることに直結する意義の大きい成果である。さらに、Ga2O3とのヘテロ接合ダイオードを試作し、本研究がさらに発展することで、将来的にはSiCやGaNを超えるパワーデバイスを実現して、省エネルギーなどの社会に貢献する可能性を示した。

Report

(3 results)
  • 2019 Annual Research Report   Final Research Report ( PDF )
  • 2018 Research-status Report
  • Research Products

    (11 results)

All 2019 2018

All Journal Article (2 results) (of which Peer Reviewed: 2 results) Presentation (9 results) (of which Int'l Joint Research: 4 results,  Invited: 1 results)

  • [Journal Article] Epitaxial growth of undoped and Li-doped NiO thin films on α-Al2O3 substrates by mist chemical vapor deposition2019

    • Author(s)
      Ikenoue Takumi、Inoue Junki、Miyake Masao、Hirato Tetsuji
    • Journal Title

      Journal of Crystal Growth

      Volume: 507 Pages: 379-383

    • DOI

      10.1016/j.jcrysgro.2018.11.032

    • NAID

      120006867138

    • Related Report
      2019 Annual Research Report 2018 Research-status Report
    • Peer Reviewed
  • [Journal Article] Hole mobility improvement in Cu2O thin films prepared by the mist CVD method2019

    • Author(s)
      Ikenoue Takumi、Kawai Toshikazu、Wakashima Ryo、Miyake Masao、Hirato Tetsuji
    • Journal Title

      Applied Physics Express

      Volume: 12 Issue: 5 Pages: 055509-055509

    • DOI

      10.7567/1882-0786/ab15b3

    • NAID

      120006867129

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed
  • [Presentation] ミストCVD法によるMgO基板上へのNiO薄膜のエピタキシャル成長2019

    • Author(s)
      滝野天琴、池之上卓己、三宅正男、平藤哲司
    • Organizer
      日本鉄鋼協会・日本金属学会関西支部鉄鋼プロセス研究会・材料化学研究会令和元年度合同講演会
    • Related Report
      2019 Annual Research Report
  • [Presentation] Epitaxial Growth and Band-Gap Control of Ni1-xMgxO Thin Film by Using Mist CVD Method2019

    • Author(s)
      Takumi Ikenoue, Masao Miyake, and Tetsuji Hirato
    • Organizer
      2019 Materials Research Symposium Fall Meeting
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Carrier density control of epitaxial NiO thin films grown using mist CVD method2019

    • Author(s)
      Takumi Ikenoue, Masao Miyake, and Tetsuji Hirato
    • Organizer
      The 9th Asis-Pacific Workshop on Widegap Semiconductors
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Bandgap control of epitaxial Ni1-xMgxO thin film by using mist chemical vapor deposition method2019

    • Author(s)
      Takumi Ikenoue, Masao Miyake, and Tetsuji Hirato
    • Organizer
      38th Electronic Materials Symposium
    • Related Report
      2019 Annual Research Report
  • [Presentation] Growth and characterization of p-type oxide semiconductor thin films by using mist CVD method.2019

    • Author(s)
      Takumi Ikenoue, Toshikazu Kawai, Ryo Wakashima, Junki Inoue, Satoshi Yoneya, Masao Miyake, and Tetsuji Hirato
    • Organizer
      20th International Union of Materials Research Societies-International Conference in Asia
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] ミストCVD法によるc面Al2O3 基板へのNi1-xMgxO薄膜のエピタキシャル成長とバンドギャップ制御2019

    • Author(s)
      米谷怜, 池之上卓己, 三宅正男, 平藤哲司
    • Organizer
      第66回 応用物理学会 春季学術講演会
    • Related Report
      2019 Annual Research Report
  • [Presentation] ミスト CVD 法による c面 Al2O3 基板への Ni1-XMgXO 薄膜のエピタキシャル成長とバンドギャップ制御2019

    • Author(s)
      米谷怜, 池之上卓己, 三宅正男, 平藤哲司
    • Organizer
      第 66 回 応用物理学会 春季学術講演会
    • Related Report
      2018 Research-status Report
  • [Presentation] Growth and conductivity control of epitaxial Li-doped NiO thin film by mist chemical vapor deposition method2018

    • Author(s)
      Takumi Ikenoue, Masao Miyake, and Tetsuji Hirato
    • Organizer
      37th Electronic Materials Symposium
    • Related Report
      2018 Research-status Report
  • [Presentation] Epitaxial growth of NiO thin films on alpha-Al2O3 substrates by using mist CVD method2018

    • Author(s)
      Takumi Ikenoue, Masao Miyake, and Tetsuji Hirato
    • Organizer
      19th International Conference on Metalorganic Vapor Phase Epitaxy
    • Related Report
      2018 Research-status Report
    • Int'l Joint Research

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Published: 2018-04-23   Modified: 2021-02-19  

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