Please use this identifier to cite or link to this item: http://hdl.handle.net/10995/102753
Title: Temperature-induced shift of the exciton absorption band in InP/ZnS quantum dots
Authors: Savchenko, S. S.
Vokhmintsev, A. S.
Weinstein, I. A.
Issue Date: 2017
Publisher: OSA - The Optical Society
Citation: Savchenko S. S. Temperature-induced shift of the exciton absorption band in InP/ZnS quantum dots / S. S. Savchenko, A. S. Vokhmintsev, I. A. Weinstein. — DOI 10.1364/OME.7.000354 // Optical Materials Express. — 2017. — Vol. 7. — Iss. 2. — P. 354-359.
Abstract: Using the second-order derivative spectrophotometry method, we have determined the energy of optical transitions of colloidal InP/ZnS core-shell quantum dots at room temperature: E1 = 2.60 eV corresponds to a first exciton absorption peak of the InP core, E2 = 4.70 eV appears to meet the processes in the ZnS shell. We have investigated E1(T) temperature dependence within 6.5 - 296 K range for the first time. The obtained experimental data have been approximated by means of a linear model and Fan's expression. Also, it has been shown that the interaction between excitons and longitudinal acoustic phonons causes the energy E1 to change with temperature. In this case, the peak's FWHM remains invariant and amounts to 0.39 eV, which indicates the inhomogeneous broadening character and a high degree of static disorder in the ensemble of the quantum dots studied. © 2017 Optical Society of America.
Keywords: ACOUSTICS
EXCITONS
II-VI SEMICONDUCTORS
III-V SEMICONDUCTORS
INDIUM PHOSPHIDE
NANOCRYSTALS
SEMICONDUCTING INDIUM PHOSPHIDE
SEMICONDUCTOR QUANTUM DOTS
TEMPERATURE DISTRIBUTION
ZINC SULFIDE
CORE-SHELL QUANTUM DOTS
EXCITON ABSORPTION PEAK
EXCITON ABSORPTIONS
INHOMOGENEOUS BROADENING
LONGITUDINAL ACOUSTIC PHONONS
SECOND ORDER DERIVATIVES
TEMPERATURE DEPENDENCE
TEMPERATURE-INDUCED
SULFUR COMPOUNDS
URI: http://hdl.handle.net/10995/102753
Access: info:eu-repo/semantics/openAccess
SCOPUS ID: 85011838482
PURE ID: 1621225
a1c6e103-13d8-4283-9c2e-b09dfc1221d5
ISSN: 21593930
DOI: 10.1364/OME.7.000354
Appears in Collections:Научные публикации, проиндексированные в SCOPUS и WoS CC

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