Recombination processes and luminescence in Li6GdxY1-x(BO3)(3)-Eu crystals / Poryvay N. E.,Sedunova I. N.,Ogorodnikov I. N.,Tolmachev A. V.,Yavetskiy R. P. // . - 2010. - V. 15, l. .

ISSN/EISSN:

1757-8981 / нет данных

Type:

Proceedings Paper

Abstract:

The results of investigation of thermally stimulated recombination processes and luminescence in Li6GdxY1-x(BO3)(3)-Eu crystals are presented. The steady-state luminescence spectra under X-ray excitation (XRL), the temperature dependence of steady-state luminescence intensity and the thermally stimulated luminescence curves (TSL) were measured at 90-500 K. In the steady-state X-ray luminescence spectra the band at 312 nm related to P-6(J)-> S-8(7/2) transitions in gadolinium ion and bands group at 580-700 nm associated with D-5(0)-> F-7(J) transitions (J = 0 ... 4) in Eu3+ ion were found to be dominant. The intensity of steady-state XRL of these bands in undoped crystal is increased by 15 times as the temperature changes from 100 to 400 K. The probable mechanisms of temperature dependence of steady-state luminescence intensity and their association with energy transfer of electronic excitations in these crystals are discussed. The investigations have shown the principle complex TSL peak with maximum at 150 K and a number of weaker peaks. The thermal activation parameters (activation energy, pre-exponential factor, kinetic order) for all intense TSL peak have been determined. The origin of small trapping centres caused TSL below room temperature and their association with defects in lithium cation sublattice is discussed.

Author keywords:

LIB3O5 CRYSTALS; ENERGY-TRANSFER; DEFECTS; CENTERS

DOI:

10.1088/1757-899X/15/1/012072

Web of Science ID:

ISI:000315348600072

Соавторы в МНС:

Другие поля

Поле	Значение
Booktitle	11TH EUROPHYSICAL CONFERENCE ON DEFECTS IN INSULATING MATERIALS (EURODIM 2010)
Series	IOP Conference Series-Materials Science and Engineering
Note	11th Europhysical Conference on Defects in Insulating Materials (EURODIM), Univ Pecs, Inst Phys, Pecs, HUNGARY, JUL 12-16, 2010
Organization	Res Inst Solid State Phys \& Opt
Publisher	IOP PUBLISHING LTD
Address	DIRAC HOUSE, TEMPLE BACK, BRISTOL BS1 6BE, ENGLAND
Language	English
Article-Number	012072
Keywords-Plus	LIB3O5 CRYSTALS; ENERGY-TRANSFER; DEFECTS; CENTERS
Research-Areas	Materials Science
Web-of-Science-Categories	Materials Science, Multidisciplinary
Author-Email	n.poryvay@gmail.com
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	11
Usage-Count-Since-2013	3
Doc-Delivery-Number	BDW55