Optical luminescence from alkyl-passivated Si nanocrystals under vacuum ultraviolet excitation: Origin and temperature dependence of the blue and orange emissions

Chao, Y ORCID: https://orcid.org/0000-0002-8488-2690, Houlton, A, Horrocks, BR, Hunt, MRC, Poolton, NRJ, Yang, J and Šiller, L (2006) Optical luminescence from alkyl-passivated Si nanocrystals under vacuum ultraviolet excitation: Origin and temperature dependence of the blue and orange emissions. Applied Physics Letters, 88 (26). pp. 263119-263121. ISSN 1077-3118

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Abstract

The origin and stability of luminescence are critical issues for Si nanocrystals which are intended for use as biological probes. The optical luminescence of alkyl-monolayer-passivated silicon nanocrystals was studied under excitation with vacuum ultraviolet photons (5.1–23 eV). Blue and orange emission bands were observed simultaneously, but the blue band only appeared at low temperatures (8.7 eV). At 8 K, the peak wavelengths of the emission bands were 430±2 nm (blue) and 600±2 nm (orange). The orange and blue emissions originate from unoxidized and oxidized Si atoms, respectively.

Item Type:	Article
Faculty \ School:	Faculty of Science > School of Chemistry
UEA Research Groups:	Faculty of Science > Research Groups > Physical and Analytical Chemistry (former - to 2017) Faculty of Science > Research Groups > Chemistry of Materials and Catalysis Faculty of Science > Research Groups > Energy Materials Laboratory
Depositing User:	Yimin Chao
Date Deposited:	02 May 2013 14:59
Last Modified:	24 Oct 2022 01:44
URI:	https://ueaeprints.uea.ac.uk/id/eprint/35250
DOI:	10.1063/1.2216911

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