Optical and luminescence spectroscopy studies of electronic structure of Li6GdB3O9 single crystals / Ogorodnikov I. N.,Pustovarov V. A.,Omelkov S. I.,Vostrov D. O.,Isaenko L. I. // OPTICAL MATERIALS. - 2014. - V. 36, l. 6. - P. 1060-1064.

ISSN/EISSN:

0925-3467 / 1873-1252

Type:

Article

Abstract:

This article presents the study of electronic structure of Li6GdB3O9 single crystals and radiative relaxation of electronic excitations in them. The investigation was performed by the means of low-temperature optical and luminescence far-ultraviolet spectroscopy upon excitation by synchrotron radiation. On the basis of the low-temperature (T = 10 and 30 K) spectra of the reflection, recorded in the present research and the dispersions of the complex optical functions of (epsilon) over cap (E), (n) over cap (E) and mu(E), calculated in the framework of the oscillator model, we have determined the parameters of the electronic structure of the Li6GdB3O9 crystals as follows. The value of the minimum energy for the interband transitions in the boron-oxygen framework is E-g = 9.42 eV, the energy position of the first excitonic peak in the excitation spectra for anionic excitons is E-n=1 = 7.46 eV, the minimum threshold energy for excitation of excitons in linear chains of the Gd3+ cations is E-c = 6.80 eV. The excitation spectra of an intrinsic luminescence of Li6GdB3O9 crystals, recorded at 10K in the range of the optical charge-transfer transitions O-Gd have a band with the maximum at E-CT = 6.57 eV. (C) 2014 Elsevier B.V. All rights reserved.

Author keywords:

Lithium-gadolinium orthoborate; Reflection spectra; Electronic structure; Luminescence excitation spectra STIMULATED RECOMBINATION PROCESSES; LITHIUM BORATE CRYSTALS; VUV SPECTROSCOPY; ENERGY-TRANSFER; LI6GD(BO3)(3)/CE3+ CRYSTALS; EXCITATIONS; SCINTILLATORS; ULTRAVIOLET; LI6Y(BO3)3; EXCITONS

DOI:

10.1016/j.optmat.2014.01.035

Web of Science ID:

ISI:000334010900010

Соавторы в МНС:

Другие поля

Поле	Значение
Month	APR
Publisher	ELSEVIER SCIENCE BV
Address	PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
Language	English
EISSN	1873-1252
Keywords-Plus	STIMULATED RECOMBINATION PROCESSES; LITHIUM BORATE CRYSTALS; VUV SPECTROSCOPY; ENERGY-TRANSFER; LI6GD(BO3)(3)/CE3+ CRYSTALS; EXCITATIONS; SCINTILLATORS; ULTRAVIOLET; LI6Y(BO3)3; EXCITONS
Research-Areas	Materials Science; Optics
Web-of-Science-Categories	Materials Science, Multidisciplinary; Optics
Author-Email	i.n.ogorodnikov@gmail.com
ResearcherID-Numbers	Isaenko, Ludmila/H-7620-2013 Isaenko, Ludmila/A-5272-2014 Ogorodnikov, Igor/B-4162-2011
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]; laboratory HASYLAB DESY {[}II-20110843]; European Social Fund ({''}Mobilitas{''}) {[}MJD219]; Estonian Research Council {[}IUT02-26]
Funding-Text	The research 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), laboratory HASYLAB DESY (project No. II-20110843), European Social Fund ({''}Mobilitas{''
Number-of-Cited-References	39
Usage-Count-Last-180-days	4
Usage-Count-Since-2013	39
Journal-ISO	Opt. Mater.
Doc-Delivery-Number	AE5EP