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Challenge to the deep-trap model of the surface in semiconductor nanocrystals

Temperature-dependent photoluminescence spectra of a range of semiconductor nanocrystals are presented which reveal an unanticipated thermodynamic relationship between the core excitonic states and the surface of the nanocrystal. These results challenge the widely held view of the surface emission a... Full description

Journal Title: Physical Review B (Condensed Matter and Materials Physics) Feb 15, 2013, Vol.87(8)
Main Author: Mooney, Jonathan
Other Authors: Krause, Michael , Saari, Jonathan , Kambhampati, Patanjali
Format: Electronic Article Electronic Article
Language: English
Subjects:
ID: ISSN: 1098-0121 ; E-ISSN: 1550-235X
Link: http://search.proquest.com/docview/1709783356/?pq-origsite=primo
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recordid: proquest1709783356
title: Challenge to the deep-trap model of the surface in semiconductor nanocrystals
format: Article
creator:
  • Mooney, Jonathan
  • Krause, Michael
  • Saari, Jonathan
  • Kambhampati, Patanjali
subjects:
  • Mathematical Models
  • Excitation Spectra
  • Nanocrystals
  • Semiconductors
  • Emission
  • Photoluminescence
  • Condensed Matter
  • Spectra
  • Condensed Matter Physics (General) (So)
  • Solid-State Physics (Ah)
ispartof: Physical Review B (Condensed Matter and Materials Physics), Feb 15, 2013, Vol.87(8)
description: Temperature-dependent photoluminescence spectra of a range of semiconductor nanocrystals are presented which reveal an unanticipated thermodynamic relationship between the core excitonic states and the surface of the nanocrystal. These results challenge the widely held view of the surface emission arising from an energetically broad distribution of midgap defect states at the surface. We show that a simpler model based on semiclassical electron transfer and invoking only a single surface state uniquely describes all observables.
language: eng
source:
identifier: ISSN: 1098-0121 ; E-ISSN: 1550-235X
fulltext: fulltext
issn:
  • 10980121
  • 1098-0121
  • 1550235X
  • 1550-235X
url: Link


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titleChallenge to the deep-trap model of the surface in semiconductor nanocrystals
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subjectMathematical Models ; Excitation Spectra ; Nanocrystals ; Semiconductors ; Emission ; Photoluminescence ; Condensed Matter ; Spectra ; Condensed Matter Physics (General) (So) ; Solid-State Physics (Ah)
descriptionTemperature-dependent photoluminescence spectra of a range of semiconductor nanocrystals are presented which reveal an unanticipated thermodynamic relationship between the core excitonic states and the surface of the nanocrystal. These results challenge the widely held view of the surface emission arising from an energetically broad distribution of midgap defect states at the surface. We show that a simpler model based on semiclassical electron transfer and invoking only a single surface state uniquely describes all observables.
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abstractTemperature-dependent photoluminescence spectra of a range of semiconductor nanocrystals are presented which reveal an unanticipated thermodynamic relationship between the core excitonic states and the surface of the nanocrystal. These results challenge the widely held view of the surface emission arising from an energetically broad distribution of midgap defect states at the surface. We show that a simpler model based on semiclassical electron transfer and invoking only a single surface state uniquely describes all observables.
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doi10.1103/PhysRevB.87.081201
pages
date2013-02-15