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Formation of high-performance thermoelectric materials by control of intermolecular chemical bonds between functional molecules

Research Project

Project/Area Number 19K22049
Research Category

Grant-in-Aid for Challenging Research (Exploratory)

Allocation TypeMulti-year Fund
Review Section Medium-sized Section 26:Materials engineering and related fields
Research InstitutionNagoya University

Principal Investigator

Nakaya Masato  名古屋大学, 工学研究科, 准教授 (30725156)

Project Period (FY) 2019-06-28 – 2021-03-31
Project Status Completed (Fiscal Year 2020)
Budget Amount *help
¥6,370,000 (Direct Cost: ¥4,900,000、Indirect Cost: ¥1,470,000)
Fiscal Year 2020: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2019: ¥5,070,000 (Direct Cost: ¥3,900,000、Indirect Cost: ¥1,170,000)
Keywordsエネルギーハーベスティング / 熱電変換 / ゼーベック効果 / 有機材料 / フラーレン / 重合反応 / 有機薄膜 / ウェアラブルデバイス / 熱電材料 / 巨大熱電効果 / 環化付加反応 / ナノ炭素 / フレキシブルエレクトロニクス / 有機エレクトロニクス / フレキシブルデバイス
Outline of Research at the Start

ヒトの体温から電力を取り出す熱電素子は,IoTセンサー用のユビキタス電源等として利用価値が高い.本研究では,高性能でかつ生体にやさしい熱電材料群を創製するために, C60分子同士が共有結合した重合体をボトムアップ構築し,これをモデル材料として,熱電特性の新しい制御法を開発する.さらに,熱電物性のナノスケール評価法を開発するなど,新材料開発と計測技術の革新の両側面から次世代熱電材料の実現へ挑む.

Outline of Final Research Achievements

High performance and flexible thermoelectric (TE) conversion devices are expected to be power sources for enormous number of wearable devices for future Internet-of-Things (IoT). Although a fullerene C60 film is one of candidates of novel flexible TE materials because of its giant Seebeck coefficient (S > 100 mv/K) at around room temperature, improvement of its very low electrical conductivity (σ: ~10-5 Ω-1cm-1) is required for practical use. However, it is generally difficult to realize TE materials exhibiting large values of both S and σ simultaneously owing to the trade-off relationship between them in bulk materials.
In this research project, I demonstrated that the σ is improved with maintaining a giant S for the C60 film by formation of intermolecular covalent bonds between adjacent C60 molecules. This is the novel methodology for control of TE property of organic semiconductors.

Academic Significance and Societal Importance of the Research Achievements

有機半導体の示す巨大ゼーベック係数S(S > 数10 mV/K)を保持しつつ、導電率σを向上させることができれば、柔らかく高性能な熱電素子への応用が拓かれる。分子薄膜のσを向上させる手法としては、不純物添加によるキャリアドープがより一般的であるものの、この方法では、σの増加と共にS値の著しい減少が起きる。本研究では、分子間結合の形成によって、分子薄膜の巨大Sを保持しながらσを向上させることに初めて成功した。この方法論を様々な有機半導体へ応用することでSとσが共に優れた値を示す高性能熱電材料の創製へと道が拓かれる。

Report

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

    (22 results)

All 2021 2020 2019

All Journal Article (5 results) (of which Int'l Joint Research: 3 results,  Peer Reviewed: 5 results,  Open Access: 2 results) Presentation (17 results) (of which Int'l Joint Research: 1 results)

  • [Journal Article] Immobilization of CO 2 at Room Temperature Using the Specific Sub‐NM Space of 1D Uneven‐Structured C 60 Polymer Film2020

    • Author(s)
      Nakaya Masato、Kitagawa Yasutaka、Watanabe Shinta、Teramoto Rena、Era Iori、Nakano Masayoshi、Onoe Jun
    • Journal Title

      Advanced Sustainable Systems

      Volume: 5 Issue: 1 Pages: 2000156-2000156

    • DOI

      10.1002/adsu.202000156

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Morphological and optical properties of α- and β-phase zinc (∥) phthalocyanine thin films for application to organic photovoltaic cells2020

    • Author(s)
      Kato Masahiro、Nakaya Masato、Matoba Yuki、Watanabe Shinta、Okamoto Koichi、Bucher Jean-Pierre、Onoe Jun
    • Journal Title

      The Journal of Chemical Physics

      Volume: 153 Issue: 14 Pages: 144704-144704

    • DOI

      10.1063/5.0022262

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Electron-beam irradiation of photopolymerized C60 film studied using in situ scanning tunneling microscope, in situ Fourier-transform infrared spectroscopy, and first-principles calculations2020

    • Author(s)
      Jun Onoe, Masato Nakaya, Shinta Watanabe, Tomonobu Nakayama, Kaoru Ohno, and Yusuke Noda
    • Journal Title

      AIP Advances

      Volume: 10 Issue: 8 Pages: 085212-085212

    • DOI

      10.1063/5.0018985

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Local dimerization and dedimerization of C60 molecules under a tip of scanning tunneling microscope: A first-principles study2020

    • Author(s)
      Shigeru Tsukamoto, Masato Nakaya, Vasile Caciuc, Nicolae Atodiresei, Tomonobu Nakayama
    • Journal Title

      Carbon

      Volume: 159 Pages: 638-647

    • DOI

      10.1016/j.carbon.2019.12.046

    • Related Report
      2019 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Control of electric, optical, thermal properties of C60 films by electron-beam irradiation2019

    • Author(s)
      Masato Nakaya, Shinta Watanabe, Jun Onoe
    • Journal Title

      Carbon

      Volume: 152 Pages: 882-887

    • DOI

      10.1016/j.carbon.2019.06.089

    • Related Report
      2019 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Presentation] C60・モリブデン酸化物複合体の熱電・電気伝導特性2021

    • Author(s)
      中谷真人、河合拓哉、渡邊真太、尾上 順
    • Organizer
      第68回応用物理学会春季学術講演会
    • Related Report
      2020 Annual Research Report
  • [Presentation] Formation of highly conductive N-type thermoelectric material by co-deposition of fullerene and cesium carbonate2021

    • Author(s)
      T. Izumi, S. Watanabe, M. Nakaya, J. Onoe
    • Organizer
      The 60th Anniversary Fullerenes-Nanotubes-Graphene General Symposium
    • Related Report
      2020 Annual Research Report
  • [Presentation] Control of optical absorption property of PbPc donor film for development of full-spectra organic photovoltaic cells2021

    • Author(s)
      H. Yoshizawa, M. Kato, M. Nakaya, J. Onoe
    • Organizer
      The 60th Anniversary Fullerenes-Nanotubes-Graphene General Symposium
    • Related Report
      2020 Annual Research Report
  • [Presentation] Formation of high-performance P-type thermoelectric materials composed of fullerene molecules and molybdenum oxide nanoclusters2021

    • Author(s)
      M. Nakaya, S. Watanabe, J. Onoe
    • Organizer
      The 60th Anniversary Fullerenes-Nanotubes-Graphene General Symposium
    • Related Report
      2020 Annual Research Report
  • [Presentation] フラーレンと炭酸セシウムの共蒸着による高導電性N型熱電材料の創製2020

    • Author(s)
      和泉 竜馬、中谷 真人、尾上 順
    • Organizer
      日本原子力学会中部支部 第52回研究発表会
    • Related Report
      2020 Annual Research Report
  • [Presentation] フルスペクトル有機太陽電池の実現へ向けた鉛フタロシアニン蒸着膜の光吸収特性制御2020

    • Author(s)
      吉沢駿人、加藤雅洋、中谷真人、尾上 順
    • Organizer
      日本原子力学会中部支部 第52回研究発表会
    • Related Report
      2020 Annual Research Report
  • [Presentation] 希少金属元素のリサイクルの高効率化に向けた配位高分子の薄膜化と電気化学的荷電状態制御2020

    • Author(s)
      渡邉紘貴、高橋拓人、中谷真人、尾上順
    • Organizer
      日本原子力学会中部支部 第52回研究発表会
    • Related Report
      2020 Annual Research Report
  • [Presentation] C60 とモリブデン酸化物の複合化による P 型熱電材料の創製2020

    • Author(s)
      中谷真人,河合拓哉,渡邊真太,尾上 順
    • Organizer
      ナノ学会第 18 回大会
    • Related Report
      2020 Annual Research Report
  • [Presentation] KxC60 の化学量論比制御によって駆動する抵抗変化型メモリの動作速度2020

    • Author(s)
      鈴木智也,中谷真人,渡邊 慎太,尾上 順
    • Organizer
      ナノ学会第 18 回大会
    • Related Report
      2020 Annual Research Report
  • [Presentation] C60とモリブデン酸化物の複合化による熱電特性および電気伝導特性の制御2020

    • Author(s)
      中谷真人,河合拓哉,渡邊真太,尾上 順
    • Organizer
      第67回応用物理学会春季学術講演会
    • Related Report
      2019 Research-status Report
  • [Presentation] マイクロギャップ電極を用いたC60薄膜の熱電物性評価2019

    • Author(s)
      中谷真人,柴田大地,河合拓哉,渡邊真太,尾上 順
    • Organizer
      ナノ学会第17回大会
    • Related Report
      2019 Research-status Report
  • [Presentation] P型熱電特性の発現へ向けたMo酸化物とC60分子の複合化2019

    • Author(s)
      河合拓哉,中谷真人,渡邊真太,尾上 順
    • Organizer
      ナノ学会第17回大会
    • Related Report
      2019 Research-status Report
  • [Presentation] Improvement of External Quantum Efficiency of C60/ZnPc Organic Photovoltaic Cells by Polymerization between C60 molecules2019

    • Author(s)
      Yuki Matoba,Masahiro Kato,Shinta Watanabe,Koichi Okamoto,Masato Nakaya,Jun Onoe
    • Organizer
      Compound Semiconductor Week 2019
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research
  • [Presentation] C60と金属酸化物の複合化によるP型熱電材料の創製2019

    • Author(s)
      河合拓哉,中谷真人,渡邊真太,尾上 順,
    • Organizer
      第80回応用物理学会秋季学術講演会
    • Related Report
      2019 Research-status Report
  • [Presentation] KxC60化学量論比制御駆動型不揮発メモリの動作速度2019

    • Author(s)
      中谷真人,鈴木智也,渡邊真太,尾上 順
    • Organizer
      第80回応用物理学会秋季学術講演会
    • Related Report
      2019 Research-status Report
  • [Presentation] フラーレンとモリブデン酸化物の複合化によるP型熱電特性の発現と制御2019

    • Author(s)
      河合拓哉,中谷真人,尾上 順
    • Organizer
      第51回日本原子力学会中部支部研究発表会
    • Related Report
      2019 Research-status Report
  • [Presentation] C60・金属酸化物複合化によるP型熱電特性の発現2019

    • Author(s)
      河合拓哉,中谷真人,渡邊真太,尾上 順
    • Organizer
      第18回日本表面真空学会中部支部 学術講演会
    • Related Report
      2019 Research-status Report

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Published: 2019-07-04   Modified: 2022-01-27  

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