On the origin of the fast photoluminescence band in small silicon nanoparticles

Details On the origin of the fast photoluminescence band in small silicon nanoparticles On the origin of the fast photoluminescence band in small silicon nanoparticles

Jul 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008njph...10g3022v&link_type=abstract

New Journal of Physics, Volume 10, Issue 7, pp. 073022 (2008).

Physics

11

Scientific paper

Colloidal suspensions of small silicon nanoparticles (diameter around 2 nm) with fast and efficient ultraviolet blue photoluminescence (PL) band are fabricated by enhanced electrochemical etching of Si wafers. The detailed study of photoluminescence excitation spectra in a wide range of excitation photon energies (270 420 nm) reveals specific behavior of the Stokes shift of the fast PL band that agrees well with theoretical calculation of optical transitions in small silicon nanocrystals and is distinct from emission of silicon dioxide defects.

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