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Journal of Physics: Conference SeriesVolume 1537, Issue 1, 22 June 2020, Article number 012015Smart Nanomaterials 2019: Advances, Innovation and Applications, SNAIA 2019; Paris; France; 10 December 2019 through 13 December 2019; Code 161301

Non-radiative relaxation processes in luminescence of InP/ZnS quantum dots(Conference Paper)(Open Access)

  • Savchenko, S.S.,
  • Vokhmintsev, A.S.,
  • Weinstein, I.A.
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  • aNANOTECH Centre, Ural Federal University, 19 Mira str., Ekaterinburg, 620002, Russian Federation
  • bInstitute of Metallurgy, Ural Branch, Russian Academy of Sciences, 101 Amundsen str., Ekaterinburg, 620016, Russian Federation

Abstract

Photoluminescence (PL) thermal quenching of InP/ZnS core/shell nanocrystals of 4.2 (QD-1) and 4.6 (QD-2) nm in diameter is investigated in the temperature range of 6.5-296 K. Observed PL spectra are found to originate from exciton and defect-related transitions. Temperature behavior of the emission bands indicates effects of inhomogeneous broadening due to distributions of quantum dots parameters in the ensembles. PL thermal quenching analysis unveils two non-radiative relaxation channels for each band in both samples. Activation energies of 130 and 119 meV in QD-1 and QD-2, correspondingly, for the exciton band can be assigned to the bright-bright splitting of the exciton fine structure. © Published under licence by IOP Publishing Ltd.

Indexed keywords

Engineering controlled terms:Activation energyExcitonsIII-V semiconductorsIndium phosphideNanostructured materialsQuenchingSemiconducting indium phosphideSemiconductor quantum dots
Engineering uncontrolled termsCore/shell nanocrystalsEmission bandsExciton fine structureInhomogeneous broadeningNon-radiative relaxationTemperature behaviorTemperature rangeThermal quenching
Engineering main heading:Nanocrystals

Funding details

Funding sponsor Funding number Acronym
Departamento Administrativo de Ciencia, Tecnología e Innovación (COLCIENCIAS)727-2015

  • 1

    We gratefully acknowledge the financial support received from the Departamento Administrativo de Ciencia, Tecnología e Innovación, Colciencias, Colombia, through Convocatoria No. 727-2015. The authors would also like to thank the administrative support received from the Centro de Investigación para el Desarrollo y la Innovación (CIDI) of the Universidad Pontificia Bolivariana.

  • ISSN: 17426588
  • Source Type: Conference Proceeding
  • Original language: English
  • DOI: 10.1088/1742-6596/1537/1/012015
  • Document Type: Conference Paper
  • Publisher: Institute of Physics Publishing


© Copyright 2020 Elsevier B.V., All rights reserved.

Cited by 2 documents

Weinstein, I.A. , Savchenko, S.S.
Temperature behavior of the optical spectra of InP/ZnS nanocrystals stabilized by a polyvinylpyrrolidone-based coating
(2023) Russian Chemical Bulletin
Savchenko, S.S. , Vokhmintsev, A.S. , Weinstein, I.A.
Activation energy distribution in thermal quenching of exciton and defect-related photoluminescence of InP/ZnS quantum dots
(2022) Journal of Luminescence
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