Lookup NU author(s): Dr Yimin Chao,
Professor Andrew Houlton,
Dr Ben Horrocks,
Professor Jianhua Yang,
Professor Lidija Siller
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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 (<175 K) and with high excitation energies (>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. © 2006 American Institute of Physics.
Author(s): Chao Y, Houlton A, Horrocks BR, Hunt MRC, Poolton NRJ, Yang J, Siller L
Publication type: Article
Publication status: Published
Journal: Applied Physics Letters
ISSN (print): 0003-6951
ISSN (electronic): 1077-3118
Publisher: American Institute of Physics
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