Polarized photoluminescence from surface-passivated lead sulfide nanocrystals

Fernee, M. J., Warner, J., Watt, A., Cooper, S., Heckenberg, N. R. and Rubinsztein-Dunlop, H. (2004) Polarized photoluminescence from surface-passivated lead sulfide nanocrystals. Nanotechnology, 15 1: 16-22. doi:10.1088/0957-4484/15/1/003


Author Fernee, M. J.
Warner, J.
Watt, A.
Cooper, S.
Heckenberg, N. R.
Rubinsztein-Dunlop, H.
Title Polarized photoluminescence from surface-passivated lead sulfide nanocrystals
Journal name Nanotechnology   Check publisher's open access policy
ISSN 0957-4484
Publication date 2004-01-01
Sub-type Article (original research)
DOI 10.1088/0957-4484/15/1/003
Volume 15
Issue 1
Start page 16
End page 22
Total pages 6
Place of publication Bristol
Publisher IOP Publishing Ltd
Language eng
Subject 240204 Condensed Matter Physics - Other
Abstract Effective surface passivation of lead sulfide (PbS) nanocrystals (NCs) in an aqueous colloidal solution has been achieved following treatment with CdS precursors. The resultant photoluminescent emission displays two distinct components, one originating from the absorption band edge and the other from above the absorption band edge. We show that both of these components are strongly polarized but display distinctly different behaviours. The polarization arising from the band edge shows little dependence on the excitation energy while the polarization of the above-band-edge component is strongly dependent on the excitation energy. In addition, time-resolved polarization spectroscopy reveals that the above-band-edge polarization is restricted to the first couple of nanoseconds, while the band edge polarization is nearly constant over hundreds of nanoseconds. We recognize an incompatibility between the two different polarization behaviours, which enables us to identify two distinct types of surface-passivated PbS NC.
Keyword condensed matter physics
quantum computation
Engineering, Multidisciplinary
Nanoscience & Nanotechnology
Materials Science, Multidisciplinary
Physics, Applied
Salt Quantum Dots
Core/shell Nanocrystals
Semiconductor Nanocrystals
Luminescence Properties
Pbs Nanoparticles
Cdse Nanocrystals
Porous Silicon
Chemistry
Emission
Colloids
Q-Index Code C1

Document type: Journal Article
Sub-type: Article (original research)
Collections: Excellence in Research Australia (ERA) - Collection
School of Physical Sciences Publications
 
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Citation counts: TR Web of Science Citation Count  Cited 16 times in Thomson Reuters Web of Science Article | Citations
Scopus Citation Count Cited 17 times in Scopus Article | Citations
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Created: Tue, 03 Apr 2007, 00:02:33 EST by Kaye Eldridge on behalf of School of Mathematics & Physics