Non-radiative relaxation processes in luminescence of InP/ZnS quantum dots

Savchenko, S. S.; Vokhmintsev, A. S.; Weinstein, I. A.

doi:10.1088/1742-6596/1537/1/012015

Please use this identifier to cite or link to this item: http://elar.urfu.ru/handle/10995/92611

Title:	Non-radiative relaxation processes in luminescence of InP/ZnS quantum dots
Authors:	Savchenko, S. S. Vokhmintsev, A. S. Weinstein, I. A.
Issue Date:	2020
Publisher:	Institute of Physics Publishing
Citation:	Savchenko S. S. Non-radiative relaxation processes in luminescence of InP/ZnS quantum dots / S. S. Savchenko, A. S. Vokhmintsev, I. A. Weinstein. — DOI 10.1088/1742-6596/1537/1/012015 // Journal of Physics: Conference Series. — 2020. — Vol. 1. — Iss. 1537. — 12015.
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.
Keywords:	ACTIVATION ENERGY EXCITONS III-V SEMICONDUCTORS INDIUM PHOSPHIDE NANOSTRUCTURED MATERIALS QUENCHING SEMICONDUCTING INDIUM PHOSPHIDE SEMICONDUCTOR QUANTUM DOTS CORE/SHELL NANOCRYSTALS EMISSION BANDS EXCITON FINE STRUCTURE INHOMOGENEOUS BROADENING NON-RADIATIVE RELAXATION TEMPERATURE BEHAVIOR TEMPERATURE RANGE THERMAL QUENCHING NANOCRYSTALS
URI:	http://elar.urfu.ru/handle/10995/92611
Access:	info:eu-repo/semantics/openAccess
SCOPUS ID:	85089510862
PURE ID:	13683674
ISSN:	17426588
DOI:	10.1088/1742-6596/1537/1/012015
metadata.dc.description.sponsorship:	Departamento Administrativo de Ciencia, TecnologÃa e InnovaciÃ³n (COLCIENCIAS): 727-2015 Departamento Administrativo de Ciencia, TecnologÃa e InnovaciÃ³n (COLCIENCIAS) 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.
Appears in Collections:	Научные публикации ученых УрФУ, проиндексированные в SCOPUS и WoS CC

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