Electronic excitations and luminescence of SrMgF4 single crystals / Pustovarov V. A.,Ogorodnikov I. N.,Omelkov S. I.,Isaenko L. I.,Yelisseyev A. P.,Goloshumova A. A.,Lobanov S. I.,Krinitsyn P. G. // PHYSICS OF THE SOLID STATE. - 2014. - V. 56, l. 3. - P. 456-467.

ISSN/EISSN:

1063-7834 / 1090-6460

Type:

Article

Abstract:

The electronic and crystal structures of SrMgF4 single crystals grown by the Bridgman method have been investigated. The undoped SrMgF4 single crystals have been studied using low-temperature (T = 10 K) time-resolved fluorescence optical and vacuum ultraviolet spectroscopy under selective excitation by synchrotron radiation (3.7-36.0 eV). Based on the measured reflectivity spectra and calculated spectra of the optical constants, the following parameters of the electronic structure have been determined for the first time: the minimum energy of interband transitions E (g) = 12.55 eV, the position of the first exciton peak E (n) = 1 = 11.37 eV, the position of the maximum of the ``exciton{''} luminescence excitation band at 10.7 eV, and the position of the fundamental absorption edge at 10.3 eV. It has been found that photoluminescence excitation occurs predominantly in the region of the low-energy fundamental absorption edge of the crystal and that, at energies above E (g) , the energy transfer from the matrix to luminescence centers is inefficient. The exciton migration is the main excitation channel of photoluminescence bands at 2.6-3.3 and 3.3-4.2 eV. The direct photoexcitation is characteristic of photoluminescence from defects at 1.8-2.6 and 4.2-5.5 eV.

Author keywords:

VACUUM-ULTRAVIOLET; MAGNESIUM FLUORIDE; OPTICAL-PROPERTIES; SPECTROSCOPY; PHOTOLUMINESCENCE; EXCITONS; SPECTRA; SYSTEM; IONS

DOI:

10.1134/S106378341403024X

Web of Science ID:

ISI:000333159700006

Соавторы в МНС:

Другие поля

Поле	Значение
Month	MAR
Publisher	MAIK NAUKA/INTERPERIODICA/SPRINGER
Address	233 SPRING ST, NEW YORK, NY 10013-1578 USA
Language	English
EISSN	1090-6460
Keywords-Plus	VACUUM-ULTRAVIOLET; MAGNESIUM FLUORIDE; OPTICAL-PROPERTIES; SPECTROSCOPY; PHOTOLUMINESCENCE; EXCITONS; SPECTRA; SYSTEM; IONS
Research-Areas	Physics
Web-of-Science-Categories	Physics, Condensed Matter
Author-Email	igor.ogorodnikov@bk.ru
ResearcherID-Numbers	Yelisseyev, Alexander/A-3846-2014 Goloshumova, Alina/A-5356-2014 Isaenko, Ludmila/H-7620-2013 Ogorodnikov, Igor/B-4162-2011 Lobanov, Sergey/A-5379-2014 Isaenko, Ludmila/A-5272-2014 Krinitsin, Pavel/A-5268-2014
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]; Hamburg Synchrotron Radiation Laboratory HASY-LAB at DESY (Hamburg, Germany) {[}20110843]; European Social Fund (Mobilitas grant) {[}MJD219]
Funding-Text	This study was supported in part by the Ministry of Education and Science of the Russian Federation (grant no. 14.A18.21.0076), the Siberian Branch of the Russian Academy of Sciences (grant no. 28), the Hamburg Synchrotron Radiation Laboratory HASY-LAB at DESY (Hamburg, Germany) (project no. 20110843), and the European Social Fund (Mobilitas grant no. MJD219).
Number-of-Cited-References	39
Usage-Count-Last-180-days	2
Usage-Count-Since-2013	10
Journal-ISO	Phys. Solid State
Doc-Delivery-Number	AD3QB