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Development of Spatially Selective Visible Light Energy Conversion System

Research Project

Project/Area Number 22K14496
Research Category

Grant-in-Aid for Early-Career Scientists

Allocation TypeMulti-year Fund
Review Section Basic Section 26040:Structural materials and functional materials-related
Research InstitutionKobe University

Principal Investigator

MINAMIMOTO Hiro  神戸大学, 工学研究科, 講師 (80757279)

Project Period (FY) 2022-04-01 – 2024-03-31
Project Status Completed (Fiscal Year 2023)
Budget Amount *help
¥4,550,000 (Direct Cost: ¥3,500,000、Indirect Cost: ¥1,050,000)
Fiscal Year 2023: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2022: ¥3,120,000 (Direct Cost: ¥2,400,000、Indirect Cost: ¥720,000)
Keywords光エネルギー変換 / 局在表面プラズモン / 光電気化学 / プラズモニック光電変換 / 局在表面プラズモン共鳴 / 光物質変換
Outline of Research at the Start

本研究では、p型半導体とプラズモニックナノ構造から成るプラズモニックカソード電極を作製し、構造・波長に依存した励起電子の電気化学電位と電極界面プロセスの解明を通じた高効率光物質変換電系の構築を行う。実験では、金属ナノ構造に依存する光電場の空間分布や光の局在性、入射光波長に依存する反応効率や光駆動力を調査する。同時に、分光電気化学手法による界面プロセスの観測を行うことで、本系における界面プロセスの特異性を明らかにする。それらの検証に基づき、外部摂動である光エネルギーを極限まで有効利用し、多電子移動反応を空間的・時間的・エネルギー的に高効率に制御可能な新規可視光駆動還元反応系を確立する。

Outline of Final Research Achievements

In this study, plasmonic cathode electrodes were prepared, comprising plasmonic nanostructures and p-type semiconductor electrodes, with the objective of elucidating the detailed charge transfer process on these interfaces. The utilization of multi-color response plasmonic nanostructures facilitated the observation of multi-photo response characteristics on the semiconductor electrodes. Furthermore, the absolute electrochemical potential of excited electrons was successfully estimated through photo-induced metal deposition reactions. Our findings have contributed valuable insights that may inform the advancement of future photoconversion systems.

Academic Significance and Societal Importance of the Research Achievements

これまでプラズモニック構造と半導体からなる光電変換電極の開発においては、金属ナノ構造や金属種を検討し、光変換効率がどの程度向上させるかを検証するというアプローチが主であり、反応に関与する励起種がいかなる電気化学電位を有しているか、という観点からの議論はなされていなかった。本研究では、これまで軽視されがちであったその因子に焦点を当て、実際にプラズモニック電極の、特にカソード系において励起電子の絶対電気化学電位を定量的に明らかにした点で学術的意義は大きい。また、持続可能な社会の実現に向けて、将来の光エネルギー変換デバイスの設計指針を提案したという点で、社会的意義も高い。

Report

(3 results)
  • 2023 Annual Research Report   Final Research Report ( PDF )
  • 2022 Research-status Report
  • Research Products

    (17 results)

All 2023 2022

All Journal Article (3 results) (of which Peer Reviewed: 3 results,  Open Access: 1 results) Presentation (14 results) (of which Int'l Joint Research: 5 results,  Invited: 6 results)

  • [Journal Article] Applications of Ni-Al Layered Double Hydroxide as Oxygen Evolution Reaction Catalysts Synthesized by Liquid Phase Deposition Process2023

    • Author(s)
      Okayama Tatsuya、Minamimoto Hiro、Mizuhata Minoru
    • Journal Title

      Electrochemistry

      Volume: 91 Issue: 6 Pages: 067005-067005

    • DOI

      10.5796/electrochemistry.23-00047

    • ISSN
      1344-3542, 2186-2451
    • Year and Date
      2023-06-27
    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Understanding Spatial Distributions of Dye Molecules Coupled to the Surface Lattice Resonance Mode through Electrochemical Reaction Control2023

    • Author(s)
      Hayashi Takahiro、Minamimoto Hiro、Murakoshi Kei
    • Journal Title

      The Journal of Physical Chemistry Letters

      Volume: 14 Issue: 9 Pages: 2268-2276

    • DOI

      10.1021/acs.jpclett.2c03442

    • Related Report
      2023 Annual Research Report 2022 Research-status Report
    • Peer Reviewed
  • [Journal Article] Toward room-temperature optical manipulation of small molecules2023

    • Author(s)
      Minamimoto Hiro、Oyamada Nobuaki、Murakoshi Kei
    • Journal Title

      Journal of Photochemistry and Photobiology C: Photochemistry Reviews

      Volume: 55 Pages: 100582-100582

    • DOI

      10.1016/j.jphotochemrev.2023.100582

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed
  • [Presentation] nvestigations of Electrified Interfaces under Plasmon Excitations through Electrochemical Spectroscopic Measurements2023

    • Author(s)
      H. Minamimoto
    • Organizer
      12th Asian Photochemistry Conference
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] 高効率可視光エネルギー変換に向けたプラズモニック光電変換系における電荷移動過程の解明2023

    • Author(s)
      南本大穂
    • Organizer
      神戸大学分子フォトサイエンス研究センター研究会
    • Related Report
      2023 Annual Research Report
    • Invited
  • [Presentation] 固液界面における分子の光捕捉と光計測2023

    • Author(s)
      南本大穂
    • Organizer
      第74回コロイドおよび界面化学討論会
    • Related Report
      2023 Annual Research Report
    • Invited
  • [Presentation] 多色応答光電変換電極における電荷移動過程の解明2023

    • Author(s)
      田尻 悠人、南本大穂、水畑穣
    • Organizer
      2023電気化学秋季大会
    • Related Report
      2023 Annual Research Report
  • [Presentation] Investigations of Charge Transfer Processes on Plasmonic Cathode Electrodes2023

    • Author(s)
      H. Minamimoto, Y. Tajiri, D. Sato, K. Murakoshi, and M. Mizuhata
    • Organizer
      243rd ECS Meeting
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Investigations of Electric Double Layer Capacitance under Localized Surface Plasmon Excitation2023

    • Author(s)
      H. Minamimoto, Futa Shiga, and M. Mizuhata
    • Organizer
      International Conference of Photochemistry 2023
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Controls of Visible-Light Driven Reduction Reaction at Plasmonic Cathode Electrode2023

    • Author(s)
      H. Minamimoto, Y. Tajiri, and M. Mizuhata
    • Organizer
      Nanoworkshop 2023
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 局在表面プラズモン共鳴励起下における固液界面2023

    • Author(s)
      南本大穂、大西宙輝、水畑 穣
    • Organizer
      2023年光化学討論会
    • Related Report
      2023 Annual Research Report
  • [Presentation] プラズモニックカソード電極における反応活性種の電気化学電位の解明2023

    • Author(s)
      田尻悠人、南本大穂、水畑 穣
    • Organizer
      2023年度第3回関西電気化学研究会
    • Related Report
      2023 Annual Research Report
  • [Presentation] 光局在場における光物質変換プロセスの理解に向けて2023

    • Author(s)
      南本大穂
    • Organizer
      光機能材料研究会第90回講演会
    • Related Report
      2022 Research-status Report
    • Invited
  • [Presentation] 液相析出法によるNi合金系薄膜の合成とその電気化学応用2023

    • Author(s)
      渡邊智由、南本大穂、水畑 穣
    • Organizer
      電気化学会第90回大会
    • Related Report
      2022 Research-status Report
  • [Presentation] 液相析出法による層状複水酸化物の合成と酸素発生触媒能の評価2023

    • Author(s)
      岡山竜也、南本大穂、水畑 穣
    • Organizer
      電気化学会第90回大会
    • Related Report
      2022 Research-status Report
  • [Presentation] 光局在場の精密制御と光電気化学反応への応用2022

    • Author(s)
      南本大穂
    • Organizer
      第28回光科学若手研究会
    • Related Report
      2022 Research-status Report
    • Invited
  • [Presentation] Hydrogen Evolution Reactions under Plasmon Excitation2022

    • Author(s)
      H. Minamimoto and K. Murakoshi
    • Organizer
      META 2022. the 12th International Conference on Metamaterials, Photonic Crystals and Plasmonics
    • Related Report
      2022 Research-status Report
    • Int'l Joint Research / Invited

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Published: 2022-04-19   Modified: 2025-01-30  

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