A far ultraviolet spectroscopic study of the reflectance, luminescence and electronic properties of SrMgF4 single crystals / Ogorodnikov I. N.,Pustovarov V. A.,Omelkov S. I.,Isaenko L. I.,Yelisseyev A. P.,Goloshumova A. A.,Lobanov S. I. // JOURNAL OF LUMINESCENCE. - 2014. - V. 145, l. . - P. 872-879.

ISSN/EISSN:

0022-2313 / 1872-7883

Type:

Article

Abstract:

The electronic properties of single crystals of SrMgF4 have been determined using low-temperature (10-293 K) time-resolved vacuum ultraviolet synchrotron radiation spectroscopy, far ultraviolet (3.7-36 eV) reflectance spectra and calculations for the spectra of optical functions. The bandgap of investigated compound was found at E-g = 12.55 eV, the energy threshold for creation of the unrelaxed excitons at E-n=1 = 11.37 eV, and the low-energy fundamental absorption edge at 10.3 eV. Two groups of photoluminescence (PL) bands have been identified: the exciton-type emissions at 2.6-3.3 and 3.3-4.2 eV and defect-related emissions at 1.8-2.6 and 4.2-5.5 eV. It was shown that PL excitation (PLE) for the exciton-type emission bands occurs mainly at the low-energy tail of the fundamental absorption of the crystal with a maximum at 10.7 eV. At excitation energies above E-g the energy transfer from the host lattice to the PL emission centers is inefficient. The paper discusses the origin of the excitonic-type PLE spectra taking into account the results of modeling the PLE spectra shape in the framework of a simple diffusion theory and surface energy losses. (C) 2013 Elsevier B.V. All rights reserved.

Author keywords:

Time-resolved luminescence spectroscopy; Reflection spectrum; SrMgF4 single crystals; Electronic properties SELF-TRAPPED EXCITONS; VACUUM-ULTRAVIOLET; MAGNESIUM FLUORIDE; OPTICAL-PROPERTIES; EARTH; PHOTOLUMINESCENCE; SPECTRA; SYSTEM; IONS

DOI:

10.1016/j.jlumin.2013.09.006

Web of Science ID:

ISI:000330821200141

Соавторы в МНС:

Другие поля

Поле	Значение
Month	JAN
Publisher	ELSEVIER SCIENCE BV
Address	PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
Language	English
EISSN	1872-7883
Keywords-Plus	SELF-TRAPPED EXCITONS; VACUUM-ULTRAVIOLET; MAGNESIUM FLUORIDE; OPTICAL-PROPERTIES; EARTH; PHOTOLUMINESCENCE; SPECTRA; SYSTEM; IONS
Research-Areas	Optics
Web-of-Science-Categories	Optics
Author-Email	i.n.ogorodnikov@gmail.com
ResearcherID-Numbers	Goloshumova, Alina/A-5356-2014 Ogorodnikov, Igor/B-4162-2011 Isaenko, Ludmila/A-5272-2014 Lobanov, Sergey/A-5379-2014 Isaenko, Ludmila/H-7620-2013 Yelisseyev, Alexander/A-3846-2014
ORCID-Numbers	Ogorodnikov, Igor/0000-0002-4700-2340
Funding-Acknowledgement	Ministry of Education and Science of the Russian Federation {[}14.A18.21.0076]; Siberian Branch of the Russian Academy of Sciences {[}28]; HASYLAB DESY {[}20110843]; European Social Fund ('Mobilitas') {[}MJD219]; Estonian Centre of Excellence in Research Project {[}TK117T]; Estonian Ministry of Education and Research {[}IUT2-24]
Funding-Text	This work was partially supported by the Ministry of Education and Science of the Russian Federation (Grant no. 14.A18.21.0076), Siberian Branch of the Russian Academy of Sciences (Grant no. 28), HASYLAB DESY (Project no. 20110843), European Social Fund ('Mobilitas', MJD219), Estonian Centre of Excellence in Research Project TK117T and Estonian Ministry of Education and Research (project IUT2-24).
Number-of-Cited-References	40
Usage-Count-Last-180-days	1
Usage-Count-Since-2013	11
Journal-ISO	J. Lumines.
Doc-Delivery-Number	AA0XR