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Development of Highly Efficient Room Temperature Phosphorescent Materials via Thermal Activation Process

Research Project

Project/Area Number 21K18960
Research Category

Grant-in-Aid for Challenging Research (Exploratory)

Allocation TypeMulti-year Fund
Review Section Medium-sized Section 33:Organic chemistry and related fields
Research InstitutionOsaka University

Principal Investigator

Takeda Youhei  大阪大学, 大学院工学研究科, 准教授 (60608785)

Project Period (FY) 2021-07-09 – 2023-03-31
Project Status Completed (Fiscal Year 2022)
Budget Amount *help
¥6,370,000 (Direct Cost: ¥4,900,000、Indirect Cost: ¥1,470,000)
Fiscal Year 2022: ¥2,990,000 (Direct Cost: ¥2,300,000、Indirect Cost: ¥690,000)
Fiscal Year 2021: ¥3,380,000 (Direct Cost: ¥2,600,000、Indirect Cost: ¥780,000)
Keywords室温リン光 / 汎用元素 / 電荷移動 / 電子ドナー・アクセプター / 有機EL / ケイ素 / 発光 / 有機材料 / 熱活性化
Outline of Research at the Start

現在利活用されている常温リン光材料は、将来枯渇が懸念される希少金属元素を含むため、汎用元素のみから構成され、かつ高効率な室温リン光を示す有機材料の創出が望まれている。本研究では希少金属や重元素の導入、または結晶中での分子間相互作用に頼る既存の常温リン光有機分子の設計指針とは一線を画する、「熱活性型」室温リン光を活用する分子設計戦略に基づき、汎用元素だけで構成される常温リン光有機分子を創出し、有機EL素子へ応用することを目的とする。

Outline of Final Research Achievements

Materials that display phosphorescence at room temperature are utilized as light-emitting materials in organic electroluminescence (EL) devices, because they can convert excitons generated by current excitation into light energy with an internal conversion efficiency of up to 100%. However, the studies on materials composed only of abundant elements and exhibiting room-temperature phosphorescence are still in infancy. In this study, the principal investigator has succeeded in developing novel room-temperature phosphorescent (RTP) materials based on donor-acceptor-donor structure composed of only abundant elements. The materials exhibit RTP via a thermally activated mechanism and serves as a light-emitting material for high-efficiency organic EL devices.

Academic Significance and Societal Importance of the Research Achievements

RTPの発現には、トレードオフの関係にある効率的なスピン反転、熱失活の抑制を同時に達成する必要がある。今回採用した分子設計は、熱活性化により生成する高次励起三重項状態を活用することで、D-A間の揺らぎは保持したまま室温リン光を実現した。すなわち、凝集状態における分子間相互作用を活用する既存のアプローチとは一線を画している特徴的な研究である。また、希少金属の材料供給の懸念を払拭できることから、産業的にも波及効果の高い研究である。

Report

(3 results)
  • 2022 Annual Research Report   Final Research Report ( PDF )
  • 2021 Research-status Report
  • Research Products

    (29 results)

All 2023 2022 2021 Other

All Int'l Joint Research (5 results) Journal Article (5 results) (of which Int'l Joint Research: 4 results,  Peer Reviewed: 5 results,  Open Access: 2 results) Presentation (19 results) (of which Int'l Joint Research: 7 results,  Invited: 15 results)

  • [Int'l Joint Research] Silesian University of Technology(ポーランド)

    • Related Report
      2022 Annual Research Report
  • [Int'l Joint Research] Technological University of Denmark(デンマーク)

    • Related Report
      2022 Annual Research Report
  • [Int'l Joint Research] Silesian University of Technology(ポーランド)

    • Related Report
      2021 Research-status Report
  • [Int'l Joint Research] Technological University of Denmark(デンマーク)

    • Related Report
      2021 Research-status Report
  • [Int'l Joint Research] Durham University(英国)

    • Related Report
      2021 Research-status Report
  • [Journal Article] 3,11‐Diaminodibenzo[a,j]phenazine: Synthesis, Properties, and Applications to Troger's Base‐Forming Ladder Polymerization2023

    • Author(s)
      Izumi Saika、Inoue Keiki、Nitta Yuya、Enjou Tomoya、Ami Takahiro、Oka Kouki、Tohnai Norimitsu、Minakata Satoshi、Fukushima Takanori、Ishiwari Fumitaka、Takeda Youhei
    • Journal Title

      Chemistry A European Journal

      Volume: 29 Issue: 14

    • DOI

      10.1002/chem.202202702

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Dual-photofunctional organogermanium compound based on donor-acceptor-donor architecture2022

    • Author(s)
      Nyga Aleksandra、Kaihara Takahito、Hosono Takumi、Sipala Massimiliano、Stachelek Patrycja、Tohnai Norimitsu、Minakata Satoshi、de Sousa Leonardo Evaristo、de Silva Piotr、Data Przemyslaw、Takeda Youhei
    • Journal Title

      Chemical Communications

      Volume: 58 Issue: 39 Pages: 5889-5892

    • DOI

      10.1039/d2cc01568d

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Dibenzophenazine‐Based TADF Emitters as Dual Electrochromic and Electroluminescence Materials2022

    • Author(s)
      Zimmermann Crocomo Paola、Okazaki Masato、Hosono Takumi、Minakata Satoshi、Takeda Youhei、Data Przemyslaw
    • Journal Title

      Chemistry - A European Journal

      Volume: 28 Issue: 43

    • DOI

      10.1002/chem.202200826

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] A New Entry to Purely Organic Thermally Activated Delayed Fluorescence Emitters Based on Pyrido[2,3‐b]pyrazine‐Dihydrophenazasilines Donor‐Acceptor Dyad2022

    • Author(s)
      Goya Tsuyoshi、Zimmermann Crocomo Paola、Hosono Takumi、Minakata Satoshi、Sousa Leonardo Evaristo、Silva Piotr、Data Przemyslaw、Takeda Youhei
    • Journal Title

      Asian Journal of Organic Chemistry

      Volume: 11 Issue: 3

    • DOI

      10.1002/ajoc.202100780

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] The regioisomeric effect on the excited-state fate leading to room-temperature phosphorescence or thermally activated delayed fluorescence in a dibenzophenazine-cored donor?acceptor?donor system2022

    • Author(s)
      Hosono Takumi、Decarli Nicolas Oliveira、Crocomo Paola Zimmermann、Goya Tsuyoshi、de Sousa Leonardo Evaristo、Tohnai Norimitsu、Minakata Satoshi、de Silva Piotr、Data Przemyslaw、Takeda Youhei
    • Journal Title

      Journal of Materials Chemistry C

      Volume: 10 Issue: 12 Pages: 4905-4913

    • DOI

      10.1039/d1tc05730h

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Presentation] Development of TADF/RTP-Active Multi-Photofunctional Organic Emitters: Lessons from Reactions and Molecules2022

    • Author(s)
      Youhei Takeda
    • Organizer
      NTU Chemistry Lectures in Spring Semester 2022
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Development of TADF/RTP-Active Multi-Photofunctional Organic Emitters2022

    • Author(s)
      Youhei Takeda
    • Organizer
      The inaugural OU-WUT joint symposium on physical organic chemistry 2022
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Room-Temperature Phosphorescence Enabled by Excited State Engineering of Dibenzo[a,j]phenazine-Cored Donor-Acceptor-Donor Triads2022

    • Author(s)
      Youhei Takeda, Takumi Hosono, Leonardo Evaristo de Sousa, Piotr de Silva, Przemyslaw Data, Satoshi Minakata
    • Organizer
      The 19th International Symposium on Novel Aromatic Compounds (ISNA 19)
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Development of TADF-Active Multi-Photofunctional Organic Materials Based on Novel Constructive Methods of Azaaromatics2022

    • Author(s)
      Youhei Takeda
    • Organizer
      International Conference on the Science and Technology of Synthetic Metals 2022 (ICSM 2022)
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] 分子の形と元素の性質を活かした多機能性発光分子の創製2022

    • Author(s)
      武田洋平
    • Organizer
      第56回有機反応若手の会
    • Related Report
      2022 Annual Research Report
    • Invited
  • [Presentation] Development of TADF/RTP-Active Multi-Photofunctional Organic Emitters2022

    • Author(s)
      Youhei Takeda
    • Organizer
      6th International Workshop on Nano and Biophotonics (IWNBP 2022)
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] 分子の形と元素の性質で産み出す多機能性発光分子2022

    • Author(s)
      武田洋平
    • Organizer
      信州大学繊維学部 講演会
    • Related Report
      2022 Annual Research Report
    • Invited
  • [Presentation] Development of TADF/RTP-Active Multi-Photofunctional Organic Emitters Based on Dibenzo[a,j]phenazine-Cored Donor-Acceptor-Donor Architectures2022

    • Author(s)
      Youhei Taked
    • Organizer
      Japan Taiwan Bilateral Workshop on Nano-Science 2022
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] 分子の形と元素の性質を活用する有機発光材料の創製2022

    • Author(s)
      武田洋平
    • Organizer
      第92回触媒化学融合研究センター講演会
    • Related Report
      2022 Annual Research Report
    • Invited
  • [Presentation] 重元素フリーな熱活性化型室温リン光材料の創出2022

    • Author(s)
      武田 洋平
    • Organizer
      電子情報通信学会 有機エレクトロニクス研究会
    • Related Report
      2021 Research-status Report
    • Invited
  • [Presentation] 「分子の形」と「元素の性質」が織りなす多彩な電荷移動状態に基づく発光有機分子の創製2022

    • Author(s)
      武田 洋平
    • Organizer
      日本化学会第102春季年会
    • Related Report
      2021 Research-status Report
    • Invited
  • [Presentation] 新奇反応の開発に基づいた多彩な発光有機分子の創製と応用2021

    • Author(s)
      武田 洋平
    • Organizer
      九州大学先導物質化学研究所 講演会
    • Related Report
      2021 Research-status Report
    • Invited
  • [Presentation] 分子の形と元素の性質が奏でる多彩な光機能有機分子材料2021

    • Author(s)
      武田 洋平
    • Organizer
      第41回有機合成若手セミナー
    • Related Report
      2021 Research-status Report
    • Invited
  • [Presentation] 含窒素π共役骨格の新構築法を基盤とする多彩な光機能分子の創製2021

    • Author(s)
      武田 洋平
    • Organizer
      第31回基礎有機化学討論会
    • Related Report
      2021 Research-status Report
    • Invited
  • [Presentation] ジベンゾフェナジンを電子アクセプター、ジヒドロフェナザシリンを電子ドナーとするD-A-D型分子の合成と室温燐光特性2021

    • Author(s)
      細野 拓生, 呉屋 剛, Przemyslaw Data, Piotr de Silva, 武田 洋平, 南方 聖司
    • Organizer
      第31回基礎有機化学討論会
    • Related Report
      2021 Research-status Report
  • [Presentation] ジヒドロフェナザシリンを電子ドナーとするD-A-D型ジベンゾフェナジン誘導体の合成とリン光特性2021

    • Author(s)
      細野 拓生, 呉屋 剛, Przemyslaw Data, Piotr de Silva, 武田 洋平, 南方 聖司
    • Organizer
      第11回CSJ化学フェスタ2021
    • Related Report
      2021 Research-status Report
  • [Presentation] 汎用元素から成る高効率発光有機材料の開発と多機能化2021

    • Author(s)
      武田 洋平
    • Organizer
      大阪大学工業会 産学高分子塾 10周年記念公開セミナー1 応用化学専攻の有機・高分子材料研究最前線
    • Related Report
      2021 Research-status Report
    • Invited
  • [Presentation] 新奇な合成反応を起点とする多彩な光機能π共役分子の創製と応用2021

    • Author(s)
      武田 洋平
    • Organizer
      大阪市立大学 化学科談話会
    • Related Report
      2021 Research-status Report
    • Invited
  • [Presentation] Development of a dibenzophenazine-cored D-A-D pi-conjugated compound displaying room-temperature phosphorescence: A new entry to purely organic electrophosphorescent emitter2021

    • Author(s)
      akumi Hosono, Youhei Takeda,Satoshi, Minakata, Masato Okazaki, Data Przemyslaw
    • Organizer
      2021 International Chemical Congress of Pacific Basin Societies
    • Related Report
      2021 Research-status Report
    • Int'l Joint Research

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Published: 2021-07-13   Modified: 2024-01-30  

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