Luminescence and thermally stimulated recombination processes in Li6Gd(BO3)(3):Ce3+ crystals / Ogorodnikov I. N.,Poryvai N. E.,Sedunova I. N.,Tolmachev A. V.,Yavetskiy R. P. // OPTICS AND SPECTROSCOPY. - 2011. - V. 110, l. 2. - P. 266-276.

ISSN/EISSN:

0030-400X / нет данных

Type:

Article

Abstract:

The luminescence and thermally stimulated recombination processes in lithium borate crystals Li6Gd(BO3)(3) and Li6Gd(BO3)(3):Ce have been studied. The steady-state luminescence spectra under X-ray excitation (X-ray luminescence), temperature dependences of the intensity of steady-state X-ray luminescence (XL), and thermally stimulated luminescence (TSL) spectra of these compounds have been investigated in the temperature range of 90-500 K. The intrinsic-luminescence 312-nm band, which is due to the (6) P (J) -> (8) S (7/2) transitions in Gd3+ matrix ions, dominates in the X-ray luminescence spectra of these crystals; in addition, there is a wide complex band at 400-420 nm, which is due to the d -> f transitions in Ce3+ impurity ions. It is found that the steady-state XL intensity in these bands increases several times upon heating from 100 to 400 K. The possible mechanisms of the observed temperature dependence of the steady-state XL intensity and their correlation with the features of electronic-excitation energy transfer in these crystals are discussed. The main complex TSL peak at 110-160 K and a number of minor peaks, whose composition and structure depend on the crystal type, have been found in all crystals studied. The nature of the shallow traps that are responsible for TSL at temperatures below room temperature and their relation with defects in the lithium cation sublattice are discussed.

Author keywords:

SINGLE-CRYSTALS; ENERGY-TRANSFER; GROWTH

DOI:

10.1134/S0030400X11020135

Web of Science ID:

ISI:000288176700015

Соавторы в МНС:

Другие поля

Поле	Значение
Month	FEB
Publisher	MAIK NAUKA/INTERPERIODICA/SPRINGER
Address	233 SPRING ST, NEW YORK, NY 10013-1578 USA
Language	English
Keywords-Plus	SINGLE-CRYSTALS; ENERGY-TRANSFER; GROWTH
Research-Areas	Optics; Spectroscopy
Web-of-Science-Categories	Optics; Spectroscopy
Author-Email	logo@dpt.ustu.ru
ResearcherID-Numbers	Ogorodnikov, Igor/B-4162-2011 Yavetskiy, Roman/J-4323-2015
ORCID-Numbers	Ogorodnikov, Igor/0000-0002-4700-2340 Yavetskiy, Roman/0000-0003-4260-5481
Number-of-Cited-References	23
Usage-Count-Last-180-days	1
Usage-Count-Since-2013	21
Journal-ISO	Opt. Spectrosc.
Doc-Delivery-Number	732HX