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Dynamics of excitonic properties in water-soluble CIS semiconductor quantum dots

Research Project

Project/Area Number 16K04938
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Research Field Applied materials
Research InstitutionNippon Bunri University

Principal Investigator

ICHIDA HIDEKI  日本文理大学, 工学部, 特任准教授 (50379129)

Co-Investigator(Kenkyū-buntansha) 金 大貴  大阪市立大学, 大学院工学研究科, 教授 (00295685)
Project Period (FY) 2016-04-01 – 2019-03-31
Project Status Completed (Fiscal Year 2018)
Budget Amount *help
¥4,810,000 (Direct Cost: ¥3,700,000、Indirect Cost: ¥1,110,000)
Fiscal Year 2018: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
Fiscal Year 2017: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Fiscal Year 2016: ¥2,470,000 (Direct Cost: ¥1,900,000、Indirect Cost: ¥570,000)
Keywords半導体ナノ粒子 / 分光計測 / 発光ダイナミクス / 超短パルス / 多励起子形成 / 過渡吸収スペクトル
Outline of Final Research Achievements

In this work, we have investigated that the sample preparation and excited state dynamics in I-III-VI quantum dots (QDs) such as CuInS2 QDs, which has attracted attention as a new materials substance with high quantum efficiency comparable to that of cadmium-based nanoparticles. Water-soluble CuInS2 QDs were hydrothermally prepared in the presence of N-acetyl-L-cysteine as a stabilizer, and the optimal hydrothermal synthetic conditions for NAC-capped CIS QDs were investigated. The photoluminescence quantum yield (QY) of the CIS QDs synthesized under optimal conditions was 4%, which was comparable with the highest QY reported for water-soluble CIS core QDs. The introduction of a ZnS shell produced CIS/ZnS core/shell QDs and further increased the PL QY to 30%. In order to clarify the PL origin, PL-decay profiles and time-resolved PL spectra were measured. From the experimental results, we have found that the PL origin is donor-acceptor pair luminescence.

Academic Significance and Societal Importance of the Research Achievements

半導体ナノ粒子は,量子サイズ効果によってバルク結晶とは異なる光学特性を示すことから,新しい光機能性材料として注目されており,その中でもカドミウムフリーの新材料として,I-III-VI 族半導体ナノ粒子が着目されている,本研究は,このI-III-VI 族半導体ナノ粒子の中のCuInS2ナノ粒子において,非常に高い量子効率を有する試料の作製に成功し,その光学特性を明らかにし,新しい光機能性材料への応用に向けた知見を得た.

Report

(4 results)
  • 2018 Annual Research Report   Final Research Report ( PDF )
  • 2017 Research-status Report
  • 2016 Research-status Report
  • Research Products

    (5 results)

All 2019 2018 2017 2016

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

  • [Journal Article] Synthesis of water-soluble CuInS_2 quantum dots by a hydrothermal method and their optical properties2019

    • Author(s)
      Iida Kazutaka、Uehigashi Yota、Ichida Hideki、Bu Hang-Beom、Kim DaeGwi
    • Journal Title

      Bulletin of the Chemical Society of Japan

      Volume: 92 Issue: 5 Pages: 930-936

    • DOI

      10.1246/bcsj.20180399

    • NAID

      130007649751

    • URL

      https://ocu-omu.repo.nii.ac.jp/records/2019694

    • Related Report
      2018 Annual Research Report
    • Peer Reviewed
  • [Presentation] Preparation and optical properties of ZnS-CuInS2 quantum dots2018

    • Author(s)
      Yota Uehigashi, Taisuke Nakatani, Kazutaka Iida, Hideki Ichida, and DaeGwi Kim
    • Organizer
      The 12th International Conference on Excitonic and Photonic Processes in Condensed Matter and Nano Materials
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 水熱合成法により作製したCuInS2ナノ粒子の発光特性2018

    • Author(s)
      上東洋太、飯田和貴、市田秀樹、金大貴
    • Organizer
      第65回応用物理学会春季学術講演会
    • Related Report
      2017 Research-status Report
  • [Presentation] 水熱合成法により作製したCuInS2 ナノ粒子の発光特性2017

    • Author(s)
      上東洋太、飯田和貴、李?信、渡辺太一、市田秀樹、金大貴
    • Organizer
      第28回光物性研究会
    • Related Report
      2017 Research-status Report
  • [Presentation] 水熱合成法によるZnS-CuInS2混晶ナノ粒子の作製2016

    • Author(s)
      中谷泰輔、市田秀樹、飯田和貴、夫 恒範、金 大貴
    • Organizer
      第27回 光物性研究会
    • Place of Presentation
      神戸大学
    • Year and Date
      2016-12-02
    • Related Report
      2016 Research-status Report

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Published: 2016-04-21   Modified: 2020-03-30  

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