RIES

Research Institute for Electronic Science, Hokkaido University

北海道大学
電子科学研究所

LAST UPDATE 2021/06/07

  • 研究者氏名
    Researcher Name

    パルヤム・スブラマンヤム　Palyam SUBRAMANYAM
    助教　Assistant Professor

  • 所属
    Professional Affiliation

    北海道大学電子科学研究所
    Research Institute for Electronic Science, Hokkaido University

    物質科学研究部門　分子フォトニクス研究分野
    Material and Molecular Sciences, Laboratory of Molecular Photonics

  • 研究キーワード
    Research Keywords


    Quantum dots
    Surface plasmons
    Charge separation and transportation
    Hetero nanostructures
研究テーマ
Research Subject

Fabrication of novel photoelectrodes for photoelectrochemical water-splitting and quantum dot sensitized solar cells.

研究の背景 Background

Semiconductor photoelectrodes have attracted a great deal of attention in solar cell applications such as photoelectrochemical (PEC) water splitting and quantum dot sensitized solar cells (QDSSCs). However, pure semiconductors have suffered from low energy conversion efficiency due to fast charge recombination. To overcome these problems, plasmonic metal-semiconductor heterostructures have become more attractive for improving PEC hydrogen generation and power conversion efficiency.

研究の目標 Outcome

The plasmon-assisted heterojunction photoelectrodes delivered high solar energy conversion efficiency as compared to that of pristine photoelectrode. As results, metal plasmons possess surface plasmon resonance which reduced the charge recombination and improved the light harvesting properties of pristine semiconductor. 

研究図Research Figure

Fig.1. J-V plots of TiO2/Bi2S3/CdS/Au photoanode for QDSSCs

Fig.2. Evolved H2 gas vs time plots of AuNRs/Bi2S3NRs photoanode for PEC water splitting

Fig.3. Evolved H2 gas vs time plots of TiO2/BiNP/Sb2S3 photoanode for PEC water splitting

文献 / Publications

Sol. Energy Mater. Sol. Cells 2017, 159, 296-306. J. Mater. Chem. C 2019, 7, 6398-6405. Catalysis Today, 2019, 325, 73-80. Inter. J. Hydrogen Energy 2020, 45, 7706-7715. Nanoscale Adv. 2020, 2, 5591-5599. ACS Appl. Nano Mater. 2021, 4, 739-745. Energy & Fuels, 2021, 35, 6315-6321.

研究者HP