Title: Energy shift of photoemission spectra for organics-passivated CdSe nanoparticles: The final-state effect
Authors: Wu, Pin-Jiun
Tsuei, Ku-Ding
Wei, Kung-Hwa
Liang, Keng S.
Department of Materials Science and Engineering
Department of Electrophysics
Keywords: nanostructures;chemical synthesis;photoelectron spectroscopies;synchrotron radiation
Issue Date: 1-Jan-2007
Abstract: Size-dependent energy shift of photoemission spectra with respect to bulk sample has been examined for colloidally prepared CdSe nanoparticles with a series of particle sizes. The core-level shifts are well described by a theoretical calculation based on a final-state effect model, whereas an additional initial-state effect due to quantum confinement is required to elucidate the valence-band edge shifts. The results indicate that the interaction between the photohole and the dielectric background in the final state has to be considered in photoemission measurements for organics-passivated nanoparticles. The calculated results in the literature appear to overestimate the initial-state effect compared to our experimental observation. (c) 2006 Elsevier Ltd. All rights reserved.
URI: http://dx.doi.org/10.1016/j.ssc.2006.09.048
ISSN: 0038-1098
DOI: 10.1016/j.ssc.2006.09.048
Volume: 141
Issue: 1
Begin Page: 6
End Page: 11
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