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Carrier control and matrix engineering of silicon quantum dot thin film

Research Project

Project/Area Number 19K22111
Research Category

Grant-in-Aid for Challenging Research (Exploratory)

Allocation TypeMulti-year Fund
Review Section Medium-sized Section 28:Nano/micro science and related fields
Research InstitutionKobe University

Principal Investigator

Fujii Minoru  神戸大学, 工学研究科, 教授 (00273798)

Co-Investigator(Kenkyū-buntansha) 杉本 泰  神戸大学, 工学研究科, 助教 (40793998)
Project Period (FY) 2019-06-28 – 2022-03-31
Project Status Completed (Fiscal Year 2021)
Budget Amount *help
¥6,500,000 (Direct Cost: ¥5,000,000、Indirect Cost: ¥1,500,000)
Fiscal Year 2021: ¥2,600,000 (Direct Cost: ¥2,000,000、Indirect Cost: ¥600,000)
Fiscal Year 2020: ¥2,600,000 (Direct Cost: ¥2,000,000、Indirect Cost: ¥600,000)
Fiscal Year 2019: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Keywords量子ドット / シリコン / ドーピング / シリコン量子ドット / シリコン量子ドット薄膜 / silicon / quantum dot
Outline of Research at the Start

シリコン量子ドットは,環境親和性・生体親和性の高い新ナノ材料であり,既存の半導体デバイス・プロセスと高い整合性を有している.本研究では,独自に開発したコア/シェル構造シリコン量子ドットの塗布薄膜の電気伝導特性を向上させ,それにより実用レベルの光・電子デバイスを実現するための基盤技術を確立することを目的とする.そのために,薄膜形成技術の開発,ドーピングによるキャリア制御,シリコン量子ドット間を金属イオンや金属ナノ粒子で架橋した複合薄膜の形成による電子移動度の向上等に関する研究を行う.

Outline of Final Research Achievements

The ultimate goal of this research is to realize high-performance optoelectronic devices from silicon quantum dots by a coating or printing process of the colloidal solution. To achieve this, we have been working on the chemical doping by molecule adsorption, the formation of a composite structure with two-dimensional transition metal dichalcogenides, the improvement of conductivity between quantum dots by adding platinum nanoparticles or graphene nanoparticles to the thin film, and the development of a composite film composed of silicon quantum dots and lead halide perovskite. Through these researches, we obtained guidelines for improving the property of silicon quantum dot thin films, and showed for the first time that a thin film produced by coating silicon quantum dots works as a photoelectrode for hydrogen generation.

Academic Significance and Societal Importance of the Research Achievements

コロイド状半導体量子ドットは,サイズにより物性制御が可能であり、また塗布により薄膜形成が可能であるため様々な応用に向けて活発に研究されている.一方,高品質のコロイド状量子ドットの多くがカドミウムの化合物であることが問題となっている.本研究は,環境親和性半導体であるシリコンの量子ドットの特性向上を目的としている.本研究において,シリコン量子ドットへの化学ドーピングや様々な材料との複合体の形成に関する研究を行い,今後のシリコン量子ドット研究の発展に有益なデータを得ることができた.また,シリコン量子ドット塗布薄膜が水素生成光電極として機能することを初めて示し,その新しい応用可能性を示した.

Report

(4 results)
  • 2021 Annual Research Report   Final Research Report ( PDF )
  • 2020 Research-status Report
  • 2019 Research-status Report
  • Research Products

    (15 results)

All 2021 2020 2019 Other

All Journal Article (6 results) (of which Int'l Joint Research: 1 results,  Peer Reviewed: 6 results,  Open Access: 1 results) Presentation (8 results) (of which Int'l Joint Research: 4 results,  Invited: 3 results) Remarks (1 results)

  • [Journal Article] Solution-processed silicon quantum dot photocathode for hydrogen evolution2021

    • Author(s)
      Takada Miho、Inoue Kosuke、Sugimoto Hiroshi、Fujii Minoru
    • Journal Title

      Nanotechnology

      Volume: 32 Issue: 48 Pages: 485709-485709

    • DOI

      10.1088/1361-6528/ac09e0

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Structure and Properties of Heavily B and P Codoped Amorphous Silicon Quantum Dots2021

    • Author(s)
      Turansky R.、Brndiar J.、Pershin A.、Gali A.、Sugimoto H.、Fujii M.、Stich I.
    • Journal Title

      The Journal of Physical Chemistry C

      Volume: 125 Issue: 42 Pages: 23267-23274

    • DOI

      10.1021/acs.jpcc.1c06527

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Colloidal solution of boron and phosphorus codoped silicon quantum dots -from material development to applications2021

    • Author(s)
      Fujii Minoru、Sugimoto Hiroshi、Kano Shinya
    • Journal Title

      Japanese Journal of Applied Physics

      Volume: 61 Issue: SA Pages: SA0807-SA0807

    • DOI

      10.35848/1347-4065/ac1c3f

    • NAID

      120007185902

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Precise size separation of water-soluble red-to-near-infrared-luminescent silicon quantum dots by gel electrophoresis2020

    • Author(s)
      Fujii Minoru、Minami Akiko、Sugimoto Hiroshi
    • Journal Title

      Nanoscale

      Volume: 12 Issue: 16 Pages: 9266-9271

    • DOI

      10.1039/d0nr02764b

    • Related Report
      2020 Research-status Report
    • Peer Reviewed
  • [Journal Article] Silicon Quantum Dot Supraparticles for Fluorescence Bioimaging2020

    • Author(s)
      Fujii Minoru、Fujii Riku、Takada Miho、Sugimoto Hiroshi
    • Journal Title

      ACS Applied Nano Materials

      Volume: 3 Issue: 6 Pages: 6099-6107

    • DOI

      10.1021/acsanm.0c01295

    • Related Report
      2020 Research-status Report
    • Peer Reviewed
  • [Journal Article] Electrically Stimulated Synaptic Resistive Switch in Solution-Processed Silicon Nanocrystal Thin Film: Formation Mechanism of Oxygen Vacancy Filament for Synaptic Function2019

    • Author(s)
      Kawauchi Takeshi、Kano Shinya、Fujii Minoru
    • Journal Title

      ACS Applied Electronic Materials

      Volume: 1 Issue: 12 Pages: 2664-2670

    • DOI

      10.1021/acsaelm.9b00625

    • Related Report
      2019 Research-status Report
    • Peer Reviewed
  • [Presentation] Colloidal solutions of silicon nanoparticles -from material development to applications2021

    • Author(s)
      Minoru Fujii and Hiroshi Sugimoto
    • Organizer
      ISPlasma 2021/ISPLANTS 2021
    • Related Report
      2020 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] シリコン量子ドット光触媒による水素生成(Ⅳ)~シリコン量子ドット-白金ナノ粒子複合光電極~2021

    • Author(s)
      井上 新司、高田 三穂、杉本 泰、藤井 稔
    • Organizer
      応用物理学会
    • Related Report
      2020 Research-status Report
  • [Presentation] シリコン量子ドット光触媒による水素生成 (III)2020

    • Author(s)
      高田 三穂、杉本 泰、藤井 稔
    • Organizer
      応用物理学会
    • Related Report
      2020 Research-status Report
  • [Presentation] シリコン量子ドット光触媒による水素生成2020

    • Author(s)
      高田 三穂、杉本 泰、藤井 稔
    • Organizer
      光化学討論会
    • Related Report
      2020 Research-status Report
  • [Presentation] Luminescence property of boron and phosphorus co-doped silicon quantum dots2019

    • Author(s)
      Minoru Fujii, and Hiroshi Sugimoto
    • Organizer
      The 7th International Conference on Light-Emitting Devices and Their Industrial Applications (LEDIA2019)
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] Size Dependent Donor and Acceptor Pair Recombination in Colloidal Silicon Quantum Dots2019

    • Author(s)
      Hiroshi Sugimoto, Minoru Fujii
    • Organizer
      2019 MRS Spring Meeting & Exhibit,
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research
  • [Presentation] サイクリックボルタンメトリーによるシリコン量子ドットのエネルギー準位構造評価2019

    • Author(s)
      井上 晃輔、杉本 泰、藤井 稔
    • Organizer
      第80回応用物理学会秋季学術講演会
    • Related Report
      2019 Research-status Report
  • [Presentation] Donor and Acceptor Pair Luminescence in Colloidal Silicon Quantum Dots2019

    • Author(s)
      Minoru Fujii, and Hiroshi Sugimoto
    • Organizer
      SemiconNano2019
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research / Invited
  • [Remarks]

    • URL

      https://www.lab.kobe-u.ac.jp/eng-nano/index.html

    • Related Report
      2021 Annual Research Report

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Published: 2019-07-04   Modified: 2023-01-30  

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