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Functionalization of cadmium-free quantum dots by surface modifications

Research Project

Project/Area Number 19K05196
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 28020:Nanostructural physics-related
Research InstitutionOsaka University

Principal Investigator

Uematsu Taro  大阪大学, 工学研究科, 講師 (20598619)

Project Period (FY) 2019-04-01 – 2022-03-31
Project Status Completed (Fiscal Year 2021)
Budget Amount *help
¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000)
Fiscal Year 2021: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2020: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2019: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Keywords量子ドット蛍光体 / カドミウムフリー / 表面修飾 / ゾルーゲル法 / 金属誘起構造体(MOF) / 複合化 / 量子ドット / マトリクスへの包埋 / バンド端発光 / コア/シェル量子ドット / 金属有機構造体(MOF) / 硫化銀インジウム / 硫化ガリウム / 金属有機構造体(MOF) / コア/シェル構造 / エネルギー移動 / 光捕集アンテナ / コア/シェル / 量子ドットコロイド
Outline of Research at the Start

小さな半導体である量子ドットは、優れた蛍光体であり、色合いを重視する高価格帯の液晶ディスプレイに搭載されている。カドミウム化合物が多く、代替材料の開発が急がれる中、我々は硫化銀インジウム量子ドットの表面を非晶質の硫化ガリウムでコーティングすることにより、大幅な発光特性改善に成功した。現在実用化に向け、同材料の特性を損なうことなく様々なデバイスに組み込むための研究を続けており、今までとは違ったコンセプトで表面修飾を行う必要性を感じている。本研究は、無機材料に加え有機無機ハイブリッド材料を用いることで、光の波長変換やエレクトロルミネッセンスなど、様々な用途に適合可能な量子ドットの開発を行う。

Outline of Final Research Achievements

The cadmium-free quantum dot "silver indium sulfide", which we have successfully obtained the monochromatic emission by gallium sulfide shell coating, were examined for further improve the photoluminescence properties and impart practical durability. Various surface modifications were applied, i.e., growing inorganic materials or hybrid materials directly from the quantum dot surface. The sources of these mateirals were injected dropwise to the solution of quantum dots, whose capping ligands had been exchanged to easily removable one. An incorporation of the quantum dots were conformed by a transmission electron microscopy, and an improvmenet of durability and/or an enhancement of the quantum dots were demonstrated by a synergetic effect of the two materials.

Academic Significance and Societal Importance of the Research Achievements

光の波長を変換する物質である蛍光体は、照明やディスプレイなど社会のあらゆる場面で活躍しており、情報社会の根幹をなす技術である。そして量子ドットは、様々な波長で励起することができ、色純度の高い光を発する新しいカテゴリーの蛍光体である。カドミウム化合物を中心に開発されたが、社会実装とともにカドミウムフリー化が強く求められており、我々は現在有力候補とされる2つのうち1つである「硫化銀インジウム量子ドット」を開発した。本研究は、ナノ材料の表面を分子レベルでデザインすることで、機能強化や耐久性向上を図ったものである。

Report

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

    (40 results)

All 2022 2021 2020 2019

All Journal Article (12 results) (of which Int'l Joint Research: 3 results,  Peer Reviewed: 12 results,  Open Access: 4 results) Presentation (22 results) (of which Int'l Joint Research: 7 results,  Invited: 5 results) Book (1 results) Patent(Industrial Property Rights) (5 results)

  • [Journal Article] Surface ligand chemistry on quaternary Ag(InxGa1-x)S2 semiconductor quantum dots for improving photoluminescence properties2022

    • Author(s)
      Hoisang Watcharaporn、Uematsu Taro、Torimoto Tsukasa、Kuwabata Susumu
    • Journal Title

      Nanoscale Advances

      Volume: 4 Issue: 3 Pages: 849-857

    • DOI

      10.1039/d1na00684c

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Encapsulation of AgInS2/GaSx core/shell quantum dots in In-fumarate metal-organic frameworks for stability enhancement2022

    • Author(s)
      Tepakidareekul Manunya、Uematsu Taro、Torimoto Tsukasa、Kuwabata Susumu
    • Journal Title

      CrystEngComm

      Volume: - Issue: 20 Pages: 3715-3723

    • DOI

      10.1039/d2ce00343k

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Photoluminescence Stability Enhancement of Ag-In-Ga-S/GaSx Core/Shell Quantum Dots with Thicker Shells by the Addition of Gallium Diethyldithiocarbamate2021

    • Author(s)
      Hoisang Watcharaporn、Uematsu Taro、Torimoto Tsukasa、Kuwabata Susumu
    • Journal Title

      Chemistry Letters

      Volume: 50 Issue: 11 Pages: 1863-1866

    • DOI

      10.1246/cl.210363

    • NAID

      130008113732

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Luminescent Quaternary Ag(InxGa1-x)S2/GaSy Core/Shell Quantum Dots Prepared Using Dithiocarbamate Compounds and Photoluminescence Recovery via Post Treatment2021

    • Author(s)
      Hoisang Watcharaporn、Uematsu Taro、Torimoto Tsukasa、Kuwabata Susumu
    • Journal Title

      Inorganic Chemistry

      Volume: 60 Issue: 17 Pages: 13101-13109

    • DOI

      10.1021/acs.inorgchem.1c01513

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed
  • [Journal Article] [Paper] Green Electroluminescence Generated by Band-edge Transition in Ag-In-Ga-S/GaS<sub><i>x</i></sub> Core/shell Quantum Dots2021

    • Author(s)
      Motomura Genichi、Iwasaki Yukiko、Kameyama Tatsuya、Torimoto Tsukasa、Uematsu Taro、Kuwabata Susumu、Tsuzuki Toshimitsu
    • Journal Title

      ITE Transactions on Media Technology and Applications

      Volume: 9 Issue: 4 Pages: 222-227

    • DOI

      10.3169/mta.9.222

    • NAID

      130008098007

    • ISSN
      2186-7364
    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Photoluminescence properties of quinary Ag(In,Ga)-(S,Se) quantum dots with a gradient alloy structure for in vivo bioimaging2021

    • Author(s)
      Rismaningsih Nurmanita、Yamauchi Hiroki、Kameyama Tatsuya、Yamamoto Takahisa、Morita Saho、Yukawa Hiroshi、Uematsu Taro、Baba Yoshinobu、Kuwabata Susumu、Torimoto Tsukasa
    • Journal Title

      Journal of Materials Chemistry C

      Volume: 9 Issue: 37 Pages: 12791-12801

    • DOI

      10.1039/d1tc02746h

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Variations in Photoluminescence Intensity of a Quantum Dot Assembly Investigated by Its Adsorption on Cubic Metal-Organic Frameworks2021

    • Author(s)
      Kumagai Kohei、Uematsu Taro、Torimoto Tsukasa、Kuwabata Susumu
    • Journal Title

      The Journal of Physical Chemistry C

      Volume: 125 Issue: 15 Pages: 8285-8293

    • DOI

      10.1021/acs.jpcc.1c00232

    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Photoluminescence Enhancement by Light Harvesting of Metal-Organic Frameworks Surrounding Semiconductor Quantum Dots2020

    • Author(s)
      Kumagai Kohei、Uematsu Taro、Torimoto Tsukasa、Kuwabata Susumu
    • Journal Title

      Chemistry of Materials

      Volume: 33 Issue: 5 Pages: 1607-1617

    • DOI

      10.1021/acs.chemmater.0c03367

    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Efficient quantum-dot light-emitting diodes using ZnS/AgInS2 solid-solution quantum dots in combination with organic charge-transport materials2020

    • Author(s)
      Motomura Genichi、Ogura Kei、Kameyama Tatsuya、Torimoto Tsukasa、Uematsu Taro、Kuwabata Susumu、Tsuzuki Toshimitsu
    • Journal Title

      Applied Physics Letters

      Volume: 116 Issue: 9 Pages: 093302-093302

    • DOI

      10.1063/1.5143618

    • Related Report
      2020 Research-status Report 2019 Research-status Report
    • Peer Reviewed
  • [Journal Article] Tailored Photoluminescence Properties of Ag(In,Ga)Se2 Quantum Dots for Near-Infrared In Vivo Imaging2020

    • Author(s)
      Tatsuya Kameyama, Hiroki Yamauchi, Takahisa Yamamoto, Toshiki Mizumaki, Hiroshi Yukawa, Masahiro Yamamoto, Shigeru Ikeda, Taro Uematsu, Yoshinobu Baba, Susumu Kuwabata, Tsukasa Torimoto
    • Journal Title

      ACS Applied Nano Materials

      Volume: 3 Issue: 4 Pages: 3275-3287

    • DOI

      10.1021/acsanm.9b02608

    • Related Report
      2020 Research-status Report 2019 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Direct surface modification of semiconductor quantum dots with metal-organic frameworks2019

    • Author(s)
      Kumagai Kohei、Uematsu Taro、Torimoto Tsukasa、Kuwabata Susumu
    • Journal Title

      CrystEngComm

      Volume: 21 Issue: 37 Pages: 5568-5577

    • DOI

      10.1039/c9ce00769e

    • Related Report
      2019 Research-status Report
    • Peer Reviewed
  • [Journal Article] Core Nanoparticle Engineering for Narrower and More Intense Band-Edge Emission from AgInS2/GaSx Core/Shell Quantum Dots2019

    • Author(s)
      Hoisang Watcharaporn、Uematsu Taro、Yamamoto Takahisa、Torimoto Tsukasa、Kuwabata Susumu
    • Journal Title

      Nanomaterials

      Volume: 9 Issue: 12 Pages: 1763-1763

    • DOI

      10.3390/nano9121763

    • Related Report
      2019 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Presentation] 結合様式の異なる配位子による多成分量子ドットの安定化と発光強度変化2022

    • Author(s)
      上松 太郎,ホイサン ワチャラポン,鳥本 司,桑畑 進
    • Organizer
      電気化学会第89回大会
    • Related Report
      2021 Annual Research Report
  • [Presentation] カドミウムフリー量子ドットの表面修飾と高機能化2021

    • Author(s)
      上松 太郎
    • Organizer
      第18回"光"機到来!Qコロキウム
    • Related Report
      2021 Annual Research Report
    • Invited
  • [Presentation] キューブ状MOFを利用した量子ドット蛍光体2次元集合体の作製と粒子間エネルギー移動2021

    • Author(s)
      上松 太郎,熊谷 康平,鳥本 司,桑畑 進
    • Organizer
      2021年電気化学会秋季大会
    • Related Report
      2021 Annual Research Report
  • [Presentation] 量子ドット/MOF複合体の光エネルギー移動2021

    • Author(s)
      上松太郎, 熊谷康平, 鳥本 司, 桑畑 進
    • Organizer
      第67回ポーラログラフィーおよび電気分析化学討論会
    • Related Report
      2021 Annual Research Report
  • [Presentation] 光捕集効果を示すMOFからのエネルギー移動による量子ドットの発光増強2021

    • Author(s)
      上松 太郎, 熊谷 康平, 鳥本 司, 桑畑 進
    • Organizer
      電気化学会第88回大会
    • Related Report
      2020 Research-status Report
  • [Presentation] 発光性半導体ナノ粒子(量子ドット)を用いたEL素子の作製:発光効率向上を目的とした素子構造の検討2021

    • Author(s)
      泉 竜之介、三田 寛人、上松 太郎、鳥本 司、桑畑 進
    • Organizer
      電気化学会第88回大会
    • Related Report
      2020 Research-status Report
  • [Presentation] Preparation of multicolor carbon dots for photoelectrochemical studies2021

    • Author(s)
      テパキッドゥアリクン マナンヤー、上松 太郎、桑畑 進
    • Organizer
      電気化学会第88回大会
    • Related Report
      2020 Research-status Report
  • [Presentation] カドミウムフリー量子ドットの機能向上2020

    • Author(s)
      上松 太郎
    • Organizer
      ニューセラミックス懇話会第241回研究会
    • Related Report
      2020 Research-status Report
    • Invited
  • [Presentation] Narrow-Band Photoluminescence from Cadmium-Free I-III-VI Ternary Semiconductor Quantum Dots By Surface Modification2020

    • Author(s)
      T. Uematsu, K. Wajima, W. Hoisang, D. K. Sharma, S. Hirata, T. Yamamoto, T. Kameyama, M. Vacha, T. Torimoto, and S. Kuwabata
    • Organizer
      PRiME 2020
    • Related Report
      2020 Research-status Report
    • Int'l Joint Research
  • [Presentation] Fabrication and Evaluation of Electroluminescence Devices Using Quantum Dots As Light Emitting Materials2020

    • Author(s)
      R. Izumi, T. Uematsu, T. Torimoto, and S. Kuwabata
    • Organizer
      PRiME 2020
    • Related Report
      2020 Research-status Report
    • Int'l Joint Research
  • [Presentation] Synthesis of color-tunable Ag(InxGa1-x)S2/GaSy core/shell quantum dots2020

    • Author(s)
      Watcharaporn Hoisang, Taro Uematsu, Tsukasa Torimoto, and Susumu Kuwabata
    • Organizer
      電気化学会第87 回大会
    • Related Report
      2019 Research-status Report
  • [Presentation] ゾル・ゲル法による量子ドット蛍光体を分散させた固体マトリクスの調製2020

    • Author(s)
      西村大輝、上松太郎、鳥本 司、桑畑 進
    • Organizer
      電気化学会第87 回大会
    • Related Report
      2019 Research-status Report
  • [Presentation] コア/シェル量子ドットの電子構造が光励起電子移動に及ぼす影響2020

    • Author(s)
      上松太郎,笹倉卓也,鳥本 司,桑畑 進
    • Organizer
      電気化学会第87 回大会
    • Related Report
      2019 Research-status Report
  • [Presentation] Improving Photoluminescence Properties of Cadmium-free Quantum Dots by the Optimization of Nanostructure2020

    • Author(s)
      Taro Uematsu
    • Organizer
      日本化学会 第100春季年会 アジア国際シンポジウム
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] 硫化ガリウムシェルを有するCu-Ag-In-S量子ドットの合成と赤色発光2019

    • Author(s)
      神畑知輝、上松太郎、鳥本 司、桑畑 進
    • Organizer
      2019年電気化学秋季大会
    • Related Report
      2019 Research-status Report
  • [Presentation] 金属有機構造体(MOFs)で包埋した量子ドットの合成と発光特性2019

    • Author(s)
      神野賢人、熊谷康平、上松太郎、鳥本 司、桑畑 進
    • Organizer
      2019年電気化学秋季大会
    • Related Report
      2019 Research-status Report
  • [Presentation] Photoluminescence Intensity and Quality Enhancement for AgInS2/GaSx Core/shell Quantum Dots by Improving Core Synthesis Method2019

    • Author(s)
      Taro Uematsu,Watcharaporn Hoisang,Tsukasa Torimoto,Susumu Kuwabata
    • Organizer
      Taiwan Japan Bilateral Workshop 2019
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research
  • [Presentation] Synthesis of Organic Ligand Free Quantum Dots in Solid State2019

    • Author(s)
      Daiki Nishimura, Taro Uematsu, Tsukasa Torimoto, and Susumu Kuwabata
    • Organizer
      Taiwan Japan Bilateral Workshop 2019
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research
  • [Presentation] Studies on exciton confinement effect of core/shell quantum dot fluorophores by photoinduced electron transfer2019

    • Author(s)
      笹倉卓也,上松太郎,鳥本司,桑畑進
    • Organizer
      電気化学会 関西支部・東海支部合同シンポジウム
    • Related Report
      2019 Research-status Report
  • [Presentation] カドミウムフリー量子ドットからの バンド端発光と光学特性向上2019

    • Author(s)
      上松 太郎
    • Organizer
      高分子討論会2019
    • Related Report
      2019 Research-status Report
    • Invited
  • [Presentation] Improvement of optical properties for cadmium-free quantum dot fluorophores2019

    • Author(s)
      Taro Uematsu
    • Organizer
      The 65th Annual Meeting of PSJ
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] Metal-organic frameworks as novel stabilizers for semiconductor quantum dots2019

    • Author(s)
      Kohei Kumagai, Taro Uematsu, Tsukasa Torimoto, and Susumu Kuwabata
    • Organizer
      The 1st Australia-Belgium-Japan joint symposium on excitonics and cellular communication
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research
  • [Book] 次世代ディスプレイへの応用に向けた 材料、プロセス技術の開発動向2020

    • Author(s)
      上松 太郎、桑畑 進
    • Total Pages
      16
    • Publisher
      技術情報協会
    • Related Report
      2019 Research-status Report
  • [Patent(Industrial Property Rights)] 半導体ナノ粒子及びその製造方法2022

    • Inventor(s)
      桑畑 進、上松 太郎
    • Industrial Property Rights Holder
      桑畑 進、上松 太郎
    • Industrial Property Rights Type
      特許
    • Industrial Property Number
      2022-022901
    • Filing Date
      2022
    • Related Report
      2021 Annual Research Report
  • [Patent(Industrial Property Rights)] 量子ドット発光素子、量子ドット発光素子の製造方法、及び表示装置2021

    • Inventor(s)
      本村 玄一、都築 俊満、岩崎 有希子、桑畑 進、上松 太郎
    • Industrial Property Rights Holder
      本村 玄一、都築 俊満、岩崎 有希子、桑畑 進、上松 太郎
    • Industrial Property Rights Type
      特許
    • Industrial Property Number
      2021-032002
    • Filing Date
      2021
    • Related Report
      2020 Research-status Report
  • [Patent(Industrial Property Rights)] 半導体ナノ粒子の製造方法及び発光デバイス2021

    • Inventor(s)
      桑畑 進、上松 太郎、鳥本 司、亀山 達矢、久保 朋也
    • Industrial Property Rights Holder
      桑畑 進、上松 太郎、鳥本 司、亀山 達矢、久保 朋也
    • Industrial Property Rights Type
      特許
    • Industrial Property Number
      2021-036602
    • Filing Date
      2021
    • Related Report
      2020 Research-status Report
  • [Patent(Industrial Property Rights)] 半導体ナノ粒子の製造方法2020

    • Inventor(s)
      桑畑 進、上松 太郎、鳥本 司、亀山 達矢、小谷松 大祐
    • Industrial Property Rights Holder
      桑畑 進、上松 太郎、鳥本 司、亀山 達矢、小谷松 大祐
    • Industrial Property Rights Type
      特許
    • Industrial Property Number
      2020-040094
    • Filing Date
      2020
    • Related Report
      2019 Research-status Report
  • [Patent(Industrial Property Rights)] 発光材料及びその製造方法2020

    • Inventor(s)
      桑畑 進、上松 太郎、鳥本 司、亀山 達矢、小谷松 大祐
    • Industrial Property Rights Holder
      桑畑 進、上松 太郎、鳥本 司、亀山 達矢、小谷松 大祐
    • Industrial Property Rights Type
      特許
    • Industrial Property Number
      2020-040093
    • Filing Date
      2020
    • Related Report
      2019 Research-status Report

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Published: 2019-04-18   Modified: 2023-01-30  

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