Inorganic surface passivation of PbS nanocrystals resulting in strong photoluminescent emission

Fernee, M. J., Watt, A., Warner, J., Cooper, S., Heckenberg, N. and Rubinsztein-Dunlop, H. (2003) Inorganic surface passivation of PbS nanocrystals resulting in strong photoluminescent emission. Nanotechnology, 14 9: 991-997. doi:10.1088/0957-4484/14/9/311


Author Fernee, M. J.
Watt, A.
Warner, J.
Cooper, S.
Heckenberg, N.
Rubinsztein-Dunlop, H.
Title Inorganic surface passivation of PbS nanocrystals resulting in strong photoluminescent emission
Journal name Nanotechnology   Check publisher's open access policy
ISSN 0957-4484
Publication date 2003-08-10
Year available 2003
Sub-type Article (original research)
DOI 10.1088/0957-4484/14/9/311
Open Access Status Not yet assessed
Volume 14
Issue 9
Start page 991
End page 997
Total pages 7
Editor N. Couzin
. Welland
Place of publication Bristol
Publisher IOP Publishing Ltd
Language eng
Subject 240402 Quantum Optics and Lasers
240000 Physical Sciences
0206 Quantum Physics
Abstract Strong photoluminescent emission has been obtained from 3 nm PbS nanocrystals in aqueous colloidal solution, following treatment with CdS precursors. The observed emission can extend across the entire visible spectrum and usually includes a peak near 1.95 eV. We show that much of the visible emission results from absorption by higher-lying excited states above 3.0 eV with subsequent relaxation to and emission from states lying above the observed band-edge of the PbS nanocrystals. The fluorescent lifetimes for this emission are in the nanosecond regime, characteristic of exciton recombination.
Keyword Condensed Matter Physics
Quantum Computation
Engineering, Multidisciplinary
Nanoscience & Nanotechnology
Materials Science, Multidisciplinary
Physics, Applied
Salt Quantum Dots
Core/shell Nanocrystals
Optical-properties
Charge Separation
Cdse Nanocrystals
Metal Sulfides
Nanoparticles
Luminescence
Semiconductors
Systems
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status Unknown

 
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Created: Mon, 02 Apr 2007, 23:40:27 EST by Kaye Eldridge on behalf of School of Mathematics & Physics