Journal
JOURNAL OF NON-CRYSTALLINE SOLIDS
Volume 345, Issue -, Pages 639-642Publisher
ELSEVIER
DOI: 10.1016/j.jnoncrysol.2004.08.114
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PbS nanoparticles have been prepared via a colloidal route and were incorporated in hybrid organic-in organic sot-gel films. X-ray diffraction and transmission electron microscopy showed the presence of spherically shaped particles with nanometric diameter. The absorption spectra showed a large blue shift of the absorption edge to shorter wavelength, indicating strong quantum confinement. Strong photoluminescence emission in the near infrared was found by pumping at 514nm. The femtosecond pump-probe technique was used for studying the relaxation dynamics of the PbS-doped films by pumping at 800nm and probing at 1500nm. (C) 2004 Elsevier B.V. All rights reserved.
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