JJAP Conference Proceedings

JJAP Conf. Proc. 3, 011106 (2015) doi:10.7567/JJAPCP.3.011106

Photoluminescence property of nano-composite phases of β-FeSi nanocrystals embedded in SiO

Tatsuya Nakamura, Takahide Tatsumi, Kosuke Morita, Hiroyuki Kobayashi, Yuya Noguchi, Yuki Kawakubo, Yoshihito Maeda

  1. Department of Computer Science and Electronics, Kyushu Institute of Technology, Iizuka, Fukuoka 820-8502, Japan
  • Received June 22, 2014
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Abstract

We have investigated photoluminescence (PL) behaviors of nano-composite phase of β-NCs embedded in SiO2 (β-NCs/SiO2). The inhomogeneous spectra consisting of the A, B, and C emission bands were observed. PL enhancement also was confirmed in comparison with β-NCs/Si. Under high pumping rate, we observed PL spectra near room temperatures (~270 K). This fact means that oxidation of the nano-composite phase can contribute to reduction of thermal quenching, which may come from increase of band offsets around β-NCs.

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