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Synthesis of Widely Fermi Level Tunable Organic Semiconducting Materials Based on Supraatomic Doping Concept

Research Project

Project/Area Number 19K15387
Research Category

Grant-in-Aid for Early-Career Scientists

Allocation TypeMulti-year Fund
Review Section Basic Section 28030:Nanomaterials-related
Research InstitutionTohoku University

Principal Investigator

Ueno Hiroshi  東北大学, 学際科学フロンティア研究所, 助教 (00775752)

Project Period (FY) 2019-04-01 – 2021-03-31
Project Status Completed (Fiscal Year 2020)
Budget Amount *help
¥3,380,000 (Direct Cost: ¥2,600,000、Indirect Cost: ¥780,000)
Fiscal Year 2020: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2019: ¥1,950,000 (Direct Cost: ¥1,500,000、Indirect Cost: ¥450,000)
Keywords有機半導体 / ドーピング / フラーレン / 超原子 / ナノ粒子 / ペロブスカイト太陽電池 / 内包フラーレン
Outline of Research at the Start

リチウムがC60ケージ内部に封入されたリチウム内包フラーレン誘導体(Li@PCBM)を,同骨格を有する空のフラーレン誘導体(PCBM)に対するn型ドーパントとして用いた新規n型半導体を創製する.構造が同じ物質を混合するため,ドーパント添加による結晶構造の乱れが少なく,ドーピングの域を超える高い割合での材料複合化が可能であり,混合割合に応じて容易かつ広い範囲でフェルミ準位を制御可能なn型半導体が得られると期待される.本材料を用いて太陽電池素子を作成・評価することで,材料汎用性を実証し,分子内部空間を活用した新規ドーピング概念を提唱する.

Outline of Final Research Achievements

A new neutral Li@C60 endohedral fullerene derivative, Li@PCBM, was synthesized and characterized. The material has a strikingly similar molecular structure to empty PCBM but different number of electrons. Such a unique feature enables the Li@PCBM and empty PCBM pair to induce effective doping without distortion of crystallinity. According to the novel doping concept, Li@PCBM:PCBM hybrid semiconducting thin film was prepared. The addition of Li@PCBM to empty PCBM raised the Fermi level of PCBM thin film by 0.12 eV, which clearly indicated the electron-donating behavior of Li@PCBM to empty PCBM. By utilizing the n-doped PCBM thin film, perovskite solar cells were fabricated. Photovoltaic parameters, VOC, JSC, and FF were clearly improved, and ca. 3% higher power conversion efficiency than control device was obtained at optimal doping concentration.

Academic Significance and Societal Importance of the Research Achievements

有機半導体分子と外観構造が全く同じであるにも関わらず,電子の数が1つだけ違うという特異な関係にある分子の合成に成功し,このような特異な関係にある2分子を用いた新ドーピング概念:超原子ドーピングを提唱により,既存有機半導体の物性チューニングが可能であることを示した.本研究により,再生エネルギーの鍵となる太陽電池等の有機デバイスに利用される有機半導体材料の高性能化,汎用化を支える重要な基礎的知見が得られた.

Report

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

    (11 results)

All 2021 2020 2019

All Journal Article (2 results) (of which Int'l Joint Research: 1 results,  Peer Reviewed: 2 results) Presentation (9 results) (of which Int'l Joint Research: 1 results,  Invited: 1 results)

  • [Journal Article] Anionic Fluorinated Zn-porphyrin Combined with Cationic Endohedral Li-fullerene for Long-Lived Photoinduced Charge Separation with Low Energy Loss2021

    • Author(s)
      Miwa Kazuhira、Aoyagi Shinobu、Sasamori Takahiro、Ueno Hiroshi、Okada Hiroshi、Ohkubo Kei
    • Journal Title

      The Journal of Physical Chemistry B

      Volume: 125 Issue: 3 Pages: 918-925

    • DOI

      10.1021/acs.jpcb.0c10450

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Li@C60 endohedral fullerene as a supraatomic dopant for C60 electron-transporting layers promoting the efficiency of perovskite solar cells2019

    • Author(s)
      Hiroshi Ueno, Il Jeon, Hao-sheng Lin, Abhishek Thote, Takafumi Nakagawa, Hiroshi Okada, Seiichiro Izawa, Masahiro Hiramoto, Hirofumi Daiguji, Shigeo Maruyama, Yutaka Matsuo
    • Journal Title

      Chemical Communications

      Volume: 55 Issue: 79 Pages: 11837-11839

    • DOI

      10.1039/c9cc06120g

    • Related Report
      2019 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Presentation] Synthesis and Characterization of Lithium-Ion-Encapsulated [70]Fullerene Li+@C70: A New Ionic Endohedral Fullerene2021

    • Author(s)
      Daiki Kitabatake, Hiroshi Ueno, Kazuhiko Kawachi, Yasuhiko Kasama, Shinobu Aoyagi, Keijiro Ohshimo, Fuminori Misaizu
    • Organizer
      60th Fullerenes, Nanotubes, and Graphene General Symposium
    • Related Report
      2020 Annual Research Report
  • [Presentation] Li+@C60薄膜の超原子分子軌道(SAMO)の直接観察2021

    • Author(s)
      山田,洋一,角 直也,上野 裕,岡田 洋史,小川 智之,佐々木 正洋,河地 和彦,笠間 泰彦
    • Organizer
      第68回応用物理学会春季学術講演会
    • Related Report
      2020 Annual Research Report
  • [Presentation] Synthesis and characterization of supramolecules of Li+@C60 and fluorinated porphyrins2020

    • Author(s)
      Kazuhira Miwa, Shinobu Aoyagi, Hiroshi Okada, Hiroshi Ueno, Kazuhiko Kawachi, Eunsang Kwon, Yasuhiko Kasama
    • Organizer
      237th ECS Meeting
    • Related Report
      2020 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 隔離されたフラーレン内部空間を活用した新材料と応用2020

    • Author(s)
      上野 裕,笠間 泰彦,美齊津 文典
    • Organizer
      化学系学協会東北大会 2020
    • Related Report
      2020 Annual Research Report
    • Invited
  • [Presentation] “隔離”されたナノ空間の積極利用と不安定化学種の化学への展開2020

    • Author(s)
      上野 裕
    • Organizer
      次世代研究者シンポジウム2020
    • Related Report
      2020 Annual Research Report
  • [Presentation] Plasma implantationを用いたLi+@C70の合成2020

    • Author(s)
      北畠 大樹,上野 裕,河地 和彦,笠間 泰彦,美齊津文典
    • Organizer
      化学系学協会東北大会 2020,
    • Related Report
      2020 Annual Research Report
  • [Presentation] Li@C60 超原子ドーパントによる n-ドープフラーレン薄膜の作製と ペロブスカイト 太陽電池への応用2020

    • Author(s)
      上野 裕,田 日,林 昊升,THOTE Abhishek,中川 貴文,岡田 洋史,伊澤 誠一郎,平本 昌宏,大宮司 啓文,丸山 茂夫,松尾 豊
    • Organizer
      第100回日本化学会春季年会
    • Related Report
      2020 Annual Research Report
  • [Presentation] Li@C60超原子ドーパントによるn-ドープフラーレン薄膜の作製とペロブスカイト太陽電池への応用2020

    • Author(s)
      上野 裕,田 日,林 昊升,THOTE Abhishek,中川 貴文,岡田 洋史,伊澤 誠一郎,平本 昌宏,大宮司 啓文,丸山 茂夫,松尾 豊
    • Organizer
      日本化学会第100回春季年会
    • Related Report
      2019 Research-status Report
  • [Presentation] Plasma Implantation of Lithium-Ion into Inner Space of C70: Synthesis and Characterization of Lithium-Ion-Encapsulated C70 (Li+@C70)2020

    • Author(s)
      Hiroshi Ueno, Kazuhiko Kawachi, Daiki Kitabatake, Keijiro Ohshimo, Hiroshi Okada, Eunsang Kwon, Shinobu Aoyagi, Yasuhiko Kasama, Fuminori Misaizu
    • Organizer
      58th Fullerenes-Nanotubes-Graphene General Symposium
    • Related Report
      2019 Research-status Report

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Published: 2019-04-18   Modified: 2022-01-27  

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