Luminescence and recombination processes in bulky Li6GdxY1-x(BO3)(3):Eu crystals / Ogorodnikov I. N.,Poryvai N. E.,Sedunova I. N.,Tolmachev A. V.,Yavetskii R. P. // OPTICS AND SPECTROSCOPY. - 2011. - V. 111, l. 3. - P. 441-450.

ISSN/EISSN:

0030-400X / нет данных

Type:

Article; Proceedings Paper

Abstract:

The luminescence and recombination processes in crystals of lithium borates Li6Gd (x) Y1 - x (BO3)(3):Eu have been investigated. The steady-state X-ray luminescence (XRL) spectra, the temperature dependences of the XRL intensity, and the thermally stimulated luminescence (TSL) spectra have been measured for the Li6Gd(BO3)(3), Li6Eu(BO3)(3), Li6Y0.5Gd0.5(BO3)(3):Eu, and Li6Gd(BO3)(3):Eu compounds in the temperature range of 90-500 K. It is established that the band at 312 nm, which is due to the (6) P (J) -> (8) S (7/2) transitions in Gd3+ ions and the group of lines at 580-700 nm, which are due to the (5) D (0) -> (7) F (J) (J = 0 aEuro broken vertical bar 4) transitions in Eu3+ ions dominate in the XRL spectra. The XRL intensity in these bands increases several times with a change in temperature from 100 to 400 K for undoped crystals. The likely mechanisms of the observed temperature dependence of the XRL intensity and their relationship with the features of electronic-excitation energy transfer in these crystals are discussed. The spectra of all crystals under study exhibit a dominant composite TSL peak with a maximum at 110-160 K and a series of weaker peaks, the composition and structure of which depend on the crystal type. The nature of the shallow traps, which are responsible for the TSL at temperatures below room, and their relationship with the defects of lithium cation sublattice are discussed.

Author keywords:

LITHIUM TRIBORATE LIB3O5; THERMALLY STIMULATED LUMINESCENCE; ENERGY-TRANSFER; SINGLE-CRYSTALS; DEFECTS; LI6GD(BO3)3; GROWTH

DOI:

10.1134/S0030400X11090190

Web of Science ID:

ISI:000295678200020

Соавторы в МНС:

Другие поля

Поле	Значение
Month	SEP
Note	14th International Feofilov Symposium on Spectroscopy of Crystals Doped with Rare Earth and Transition Metal Ions, Univ Informat Technol, Mech, \& Optics, St Petersburg, RUSSIA, OCT 18-21, 2010
Publisher	MAIK NAUKA/INTERPERIODICA/SPRINGER
Address	233 SPRING ST, NEW YORK, NY 10013-1578 USA
Language	English
Keywords-Plus	LITHIUM TRIBORATE LIB3O5; THERMALLY STIMULATED LUMINESCENCE; ENERGY-TRANSFER; SINGLE-CRYSTALS; DEFECTS; LI6GD(BO3)3; GROWTH
Research-Areas	Optics; Spectroscopy
Web-of-Science-Categories	Optics; Spectroscopy
Author-Email	ogo@dpt.ustu.ru
ResearcherID-Numbers	Yavetskiy, Roman/J-4323-2015 Ogorodnikov, Igor/B-4162-2011
ORCID-Numbers	Ogorodnikov, Igor/0000-0002-4700-2340 Yavetskiy, Roman/0000-0003-4260-5481
Number-of-Cited-References	29
Usage-Count-Last-180-days	1
Usage-Count-Since-2013	13
Journal-ISO	Opt. Spectrosc.
Doc-Delivery-Number	830ST