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

Chao, Y.; Houlton, A.; Horrocks, B.R.; Hunt, M.R.C.; Poolton, N.R.J.; Yang, J.; Siller, L.

Authors

Y. Chao

A. Houlton

B.R. Horrocks

N.R.J. Poolton

J. Yang

L. Siller



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 (< 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

Citation

Chao, Y., Houlton, A., Horrocks, B., Hunt, M., Poolton, N., Yang, J., & Siller, 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), 1-3. https://doi.org/10.1063/1.2216911

Journal Article Type Article
Publication Date 2006-06
Journal Applied Physics Letters
Print ISSN 0003-6951
Publisher American Institute of Physics
Peer Reviewed Peer Reviewed
Volume 88
Issue 26
Pages 1-3
DOI https://doi.org/10.1063/1.2216911
Publisher URL http://scitation.aip.org/getabs/servlet/GetabsServlet?prog=normal&id=APPLAB000088000026263119000001&idtype=cvips&gifs=yes