Structural and photoluminescence properties of Si-based nanosheet bundles rooted on Si substrates
Abstract
Si-based nanosheet bundles were synthesized by the extraction of Ca atoms from CaSi2 microwalls grown on Si substrates by inositol hexakisphosphate solution or thermal treatment in FeCl2 vapor. The structural and photoluminescence properties of the Si-based nanosheet bundles were examined. The photoluminescence emissions in the visible region were clearly observed, and the temperature and excitation intensity dependences of the emissions were characterized. The observed Si-based nanosheets consist of thin Si layers, and a superlattice-like layered structural model is proposed to describe the Si-based nanosheet bundle structures and their photoluminescence property. The photoluminescence property of the nanosheets significantly depends on their treatment process. The luminescence mechanism of the nanosheets was discussed.
- Publication:
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Japanese Journal of Applied Physics
- Pub Date:
- April 2018
- DOI:
- 10.7567/JJAP.57.04FJ01
- Bibcode:
- 2018JaJAP..57dFJ01Y