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Proceedings Paper

Synthesis of ultraviolet luminescent silicon nanocrystals by nanosecond pulsed laser ablation in water
Author(s): Wei Yu; Ligong Li; Huixia Gao; Shujie Wu; Guangsheng Fu
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Paper Abstract

We report the preparation of silicon nanocrystals with efficient ultraviolet luminescence by nanosecond pulsed laser ablation in de-ionized water at a high laser fluence condition. Atomic force microscopy results show that nano-grains form in the process of laser ablation. Fourier transform infrared spectroscopy analyses indicate that silicon nanocrystals are formed and partially oxidized during synthesis. The photoluminescence measurement and the ultraviolet-visible transmittance spectroscopy of the samples prepared at various fluences reveal that all the prepared samples present an efficient ultraviolet emission at room temperature and it can be attributed to the quantum confinement effect and surface defect states. The emission wavelength of silicon nanocrystals is far shorter than visible light, which means potential applications in optoelectronic devices.

Paper Details

Date Published: 18 November 2008
PDF: 8 pages
Proc. SPIE 7135, Optoelectronic Materials and Devices III, 713522 (18 November 2008); doi: 10.1117/12.803522
Show Author Affiliations
Wei Yu, Hebei Univ. (China)
Ligong Li, Hebei Univ. (China)
Huixia Gao, Hebei Univ. (China)
Shujie Wu, Hebei Univ. (China)
Guangsheng Fu, Hebei Univ. (China)

Published in SPIE Proceedings Vol. 7135:
Optoelectronic Materials and Devices III
Yi Luo; Jens Buus; Fumio Koyama; Yu-Hwa Lo, Editor(s)

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