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Creation of ultra-wide bandgap p-type transition metal oxides and device applications

Research Project

Project/Area Number 21H01811
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Review Section Basic Section 29020:Thin film/surface and interfacial physical properties-related
Research InstitutionRitsumeikan University (2022-2023)
Kyoto University (2021)

Principal Investigator

Kaneko Kentaro  立命館大学, 総合科学技術研究機構, 教授 (50643061)

Project Period (FY) 2021-04-01 – 2024-03-31
Project Status Completed (Fiscal Year 2023)
Budget Amount *help
¥17,940,000 (Direct Cost: ¥13,800,000、Indirect Cost: ¥4,140,000)
Fiscal Year 2023: ¥2,470,000 (Direct Cost: ¥1,900,000、Indirect Cost: ¥570,000)
Fiscal Year 2022: ¥2,860,000 (Direct Cost: ¥2,200,000、Indirect Cost: ¥660,000)
Fiscal Year 2021: ¥12,610,000 (Direct Cost: ¥9,700,000、Indirect Cost: ¥2,910,000)
Keywords二酸化ゲルマニウム / パワー半導体 / 超ワイドバンドギャップ / UWBG / 酸化物 / 結晶成長 / 薄膜 / ミストCVD法 / 超ワイドギャップ半導体 / p型酸化物 / パワーデバイス / 準安定相 / 酸化ガリウム / pn接合
Outline of Research at the Start

本研究は、これまでの実験方法では作製する事が困難であった新しい半導体の材料を、環境負荷が小さく、かつ安全な独自の合成技術によって作製し、超省エネルギー電子デバイスの実現を目指すものです。この研究の成果によって、パソコンや携帯電話、自動車や電車、そして大きな発電所や、電気の送電時に排出される無駄なエネルギーや二酸化炭素量が大きく低減し、社会全体の省エネルギー化が大きく促進される事が期待されます。

Outline of Final Research Achievements

This research is a synthesis and evaluation of basic physical property of rutile type germanium dioxide (r-GeO2) that will greatly contribute to energy savings and miniaturization of power equipment. It is gathering much attentions for their huge bandgap, high break-down electric field, and its ambipolar dupability. However, due to its high saturated vapor pressure, it is difficult to grow thin films using conventional crystal growth equipment. In this research, we synthesized thin films using non-vaccum crystal growth equipment, and by developing basic physical properties using various evaluation methods, we were able to demonstrate the potential of germanium dioxide as a power semiconductor.

Academic Significance and Societal Importance of the Research Achievements

情報端末数の急増やAIの発達によるデータセンターの急増、移動手段の多様化により人類が使用する電力消費量は急増しています。人類の文化的な生活は莫大な電力量によって賄われていますが、持続可能な文明の発達には優れた省エネルギー技術が不可欠です。本研究で行った、高効率な二酸化ゲルマニウムパワー半導体素子が社会実装される事で、人類の文化文明の持続的発達に貢献する事が出来ます。また、これまで合成困難であった二酸化ゲルマニウムパワー半導体の薄膜合成を行い、混晶作製や様々な構造評価、電気特性評価により基礎物性開拓に貢献し、今後の二酸化ゲルマニウムパワー半導体研究の端緒となる基礎学理の構築を行う事が出来ました。

Report

(4 results)
  • 2023 Annual Research Report   Final Research Report ( PDF )
  • 2022 Annual Research Report
  • 2021 Annual Research Report
  • Research Products

    (14 results)

All 2024 2023 2022 2021 Other

All Journal Article (3 results) (of which Peer Reviewed: 3 results,  Open Access: 2 results) Presentation (10 results) (of which Int'l Joint Research: 5 results,  Invited: 5 results) Remarks (1 results)

  • [Journal Article] Rutile-type Ge Sn1-xO2 alloy layers lattice-matched to TiO2 substrates for device applications2024

    • Author(s)
      Takane Hitoshi、Oshima Takayoshi、Harada Takayuki、Kaneko Kentaro、Tanaka Katsuhisa
    • Journal Title

      Applied Physics Express

      Volume: 17 Issue: 1 Pages: 011008-011008

    • DOI

      10.35848/1882-0786/ad15f3

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Band-gap engineering of rutile-structured SnO2-GeO2-SiO2 alloy system2022

    • Author(s)
      Takane Hitoshi、Ota Yuichi、Wakamatsu Takeru、Araki Tsutomu、Tanaka Katsuhisa、Kaneko Kentaro
    • Journal Title

      Physical Review Materials

      Volume: 6 Issue: 8

    • DOI

      10.1103/physrevmaterials.6.084604

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Establishment of a growth route of crystallized rutile GeO<sub>2</sub> thin film (<b>≧</b>1 <i>μ</i>m/h) and its structural properties2021

    • Author(s)
      Takane Hitoshi、Kaneko Kentaro
    • Journal Title

      Applied Physics Letters

      Volume: 119 Issue: 6 Pages: 062104-062104

    • DOI

      10.1063/5.0060785

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed
  • [Presentation] Strategy for applying GeO2 to power semiconductors2024

    • Author(s)
      Kaneko Kentaro
    • Organizer
      SPIE Photonics West
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Emerging UWBG material: GeO22023

    • Author(s)
      Kaneko Kentaro
    • Organizer
      36th International Microprocesses and Nanotechnology Conference (MNC 2023)
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] New material for power device : GeO22023

    • Author(s)
      Kaneko Kentaro
    • Organizer
      European Materials Research Society Fall Meeting
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Germanium dioxide (GeO2) as a new power device material2023

    • Author(s)
      Kaneko Kentaro
    • Organizer
      The 6th International Workshop on Ultraviolet Materials and Devices
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Ga2O3 and beyond Ga2O3 material of GeO2 for power device2022

    • Author(s)
      Kaneko Kentaro
    • Organizer
      The 8th International Symposium on Advanced Science and Technology of Silicon Materials
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] ルチル型GexSn1-xO2混晶薄膜の作製とその基礎物性2022

    • Author(s)
      高根倫史,若松岳,田中勝久,四戸孝,金子健太郎
    • Organizer
      第69回 応用物理学会 春季学術講演会
    • Related Report
      2021 Annual Research Report
  • [Presentation] Fabrication of rutile germanium dioxide thin film with high growth rate under highly oxygen-rich condition and its structural properties2021

    • Author(s)
      Takane Hitoshi、Kaneko Kentaro
    • Organizer
      40th Electronic Materials Symposium (EMS-40)
    • Related Report
      2021 Annual Research Report
  • [Presentation] High-Speed Growth of Epitaxial Rutile GeO2 Thin Film on (001) TiO2 Under Highly Oxygen-Rich Condition and Its Structural Analysis2021

    • Author(s)
      Takane Hitoshi、Kaneko Kentaro
    • Organizer
      The Electrochemical Society (2021 ECS)
    • Related Report
      2021 Annual Research Report
  • [Presentation] ミストCVD法によるルチル型GeO2薄膜のエピタキシャル成長2021

    • Author(s)
      高根 倫史,柳生 慎悟,四戸 孝,金子 健太郎
    • Organizer
      第82回 応用物理学会 秋季学術講演会
    • Related Report
      2021 Annual Research Report
  • [Presentation] ミストCVD法によるIrBr3前駆体を用いたα-Ir2O3薄膜の成長2021

    • Author(s)
      赤石智悠,  四戸孝, 金子健太郎
    • Organizer
      第82回 応用物理学会 秋季学術講演会
    • Related Report
      2021 Annual Research Report
  • [Remarks] 立命館大学 金子研究室 ホームページ

    • URL

      https://kaneko-lab.ritsumei.ac.jp/

    • Related Report
      2023 Annual Research Report 2022 Annual Research Report

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Published: 2021-04-28   Modified: 2025-01-30  

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