Preparation of luminescent Si nanocrystals from rice husks

Kimihisa Matsumoto; So Ito; Kazuhide Kamiya; Mitsuru Inada; Hidehiro Yasuda

doi:10.1117/12.2616246

27 October 2021 Preparation of luminescent Si nanocrystals from rice husks

Kimihisa Matsumoto, So Ito, Kazuhide Kamiya, Mitsuru Inada, Hidehiro Yasuda

Proceedings Volume 11927, Optical Technology and Measurement for Industrial Applications Conference 2021; 1192706 (2021) https://doi.org/10.1117/12.2616246
Event: SPIE Technologies and Applications of Structured Light, 2021, Online, Japan

Abstract

Luminescent Si nanocrystals were prepared from rice husks and the optical properties and structure analysis were studied. By the transmission electron microscope observation of the Si powder from rice husks, aggregates that are composed of Si nanoparticles with crystalline structure were confirmed. Room temperature PL with near infrared-red regions were observed from the Si nanocrystals. From the measurements of the PL decay curves, order of the life time were sub-micro seconds and that depended on the wavelength of the luminescence. These results indicates that the origin of the PL from Si nanocrystals made from rice husks is quantum size effect. Preparation of luminescent Si nanocrystals from rice husks is an effective method for recycling rice husks.

Citation Download Citation

Kimihisa Matsumoto, So Ito, Kazuhide Kamiya, Mitsuru Inada, and Hidehiro Yasuda "Preparation of luminescent Si nanocrystals from rice husks", Proc. SPIE 11927, Optical Technology and Measurement for Industrial Applications Conference 2021, 1192706 (27 October 2021); https://doi.org/10.1117/12.2616246

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