The Institute of Scientific and Industrial Research, Osaka University


LAST UPDATE 2017/02/26

  • 研究者氏名
    Researcher Name

    松本健俊 Taketoshi MATSUMOTO
    准教授 Associate Professor
  • 所属
    Professional Affiliation

    The Institute of Scientific and Industrial Research, Osaka University

    Department of Semiconductor Materials and Processes
  • 研究キーワード
    Research Keywords

    surface science
    solar cells and batteries
Research Subject
シリコン材料に関する表面科学と太陽電池、LED 及び電池への応用
Surface science of Si materials and application to solar cells, light emitting materials, and batteries

研究の背景 Background


Silicon interface properties greatly affect energy conversion efficiencies of silicon solar cells. A large amount of silicon swarf is generated during slicing silicon ingots for fabrication of solar cells. Silicon nanoparticles have been extensively studied because of their important properties such as wider band-gap due to quantum confinement effect, reactive surfaces and large surface areas. Efficient silicon solar cells and functional silicon nanoparticles can be developed by elucidation of these mechanisms by means of surface science.

研究の目標 Outcome


We are aiming to develop the nitric acid oxidation method and the semiconductor cleaning method using HCN solutions in order to passivate Si defect states and to remove metal contaminants. We also aim to improve conversion efficiencies of crystalline Si solar cells by control of interface reactions between Si substrate and metal electrodes. Our final purpose is to realize the developed technologies in solar cell fabrication processes. We try to apply silicon nanoparticles produced from silicon swarf to light emitting materials and battery materials with investigating surface properties. These techniques are attractive from the viewpoint of industrial application.

研究図Research Figure

Fig.1. Improvement of Si solar cells by the nitric acid oxidation of Si (NAOS) method. Fig.2. Si swarf and photoluminescence (PL) of Si nanoparticles (SiNPs) fabricated from Si swarf. Fig.3. Transmission electron microscope (TEM) topographs of Si nanoparticles.

文献 / Publications

Sol. Energ. Mat. Sol. C., 234, 298 (2015). Appl. Surf. Sci., 312, 39 (2014). ECS J. Solid State Sci. Technol., 3, Q137 (2014).
J. Nanopart. Res., 16, 2240 (2014). ECS J. Solid State Sci. Technol., 2, Q127 (2013).