Temperature-induced shift of the exciton absorption band in InP/ZnS quantum dots / Savchenko S. S.,Vokhmintsev A. S.,Weinstein I. A. // OPTICAL MATERIALS EXPRESS. - 2017. - V. 7, l. 2. - P. 354-359.

ISSN/EISSN:

2159-3930 / нет данных

Type:

Article

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: E-1 = 2.60 eV corresponds to a first exciton absorption peak of the InP core, E-2 = 4.70 eV appears to meet the processes in the ZnS shell. We have investigated E-1(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 E-1 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. (C) 2017 Optical Society of America

Author keywords:

SEMICONDUCTOR NANOCRYSTALS; DEPENDENCE; GAP

DOI:

10.1364/OME.7.000354

Web of Science ID:

ISI:000394173200007

Соавторы в МНС:

Другие поля

Поле	Значение
Month	FEB 1
Publisher	OPTICAL SOC AMER
Address	2010 MASSACHUSETTS AVE NW, WASHINGTON, DC 20036 USA
Language	English
Keywords-Plus	SEMICONDUCTOR NANOCRYSTALS; DEPENDENCE; GAP
Research-Areas	Materials Science; Optics
Web-of-Science-Categories	Materials Science, Multidisciplinary; Optics
Author-Email	i.a.weinstein@urfu.ru
ResearcherID-Numbers	Weinstein, Ilya/K-8178-2012
ORCID-Numbers	Weinstein, Ilya/0000-0002-5573-7128
Funding-Acknowledgement	Act 211 Government of the Russian Federation {[}02.A03.21.0006]; President of Russian Federation {[}MK-5729.2015.2]
Funding-Text	The work was supported by Act 211 Government of the Russian Federation, contract No. 02.A03.21.0006. A.S.V. thanks grant of the President of Russian Federation for financial supporting {[}grant number MK-5729.2015.2].
Number-of-Cited-References	30
Usage-Count-Last-180-days	6
Usage-Count-Since-2013	6
Journal-ISO	Opt. Mater. Express
Doc-Delivery-Number	EK8KS