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White light emitting silicon nanocrystals as nanophosphor
Author(s) -
Lee Soojin,
Cho Woon Jo,
Han Il Ki,
Choi Won Jun,
Lee Jung Il
Publication year - 2004
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/pssb.200404971
Subject(s) - silicon , materials science , nanocrystal , nanoparticle , luminescence , optoelectronics , nanotechnology , white light , colloid , diode , quantum dot , spectroscopy , chemical engineering , engineering , physics , quantum mechanics
We exploited the practical sonochemical route for preparing silicon nanocrystals at room temperature and ambient pressure. This synthesis provided the very fast reaction within a few hours and the useful modification for the surface of silicon nanoparticles. The average size of prepared nanocrystals was 2.8 nm and confirmed by TEM images. The chlorine‐capped nanoparticles were characterized by FT‐IR spectroscopy. The luminescence of silicon colloid was observed in the wide range between 340 nm and near 700 nm and showed white color with commercial low‐intensity UV‐lamp exposure. This synthetic strategy is potentially applicable for illuminating devices such as white light emitting diodes. (© 2004 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)