Kinetics of tunneling electron transfer between antimorphous defects in optical crystals with mobile cations / Ogorodnikov I. N.,Kiseleva M. S. // JOURNAL OF EXPERIMENTAL AND THEORETICAL PHYSICS. - 2012. - V. 115, l. 1. - P. 154-163.

ISSN/EISSN:

1063-7761 / нет данных

Type:

Article

Abstract:

The experimental data on the transient optical absorption of wide-band-gap optical crystals of lithium borates Li2B4O7, LiB3O5, and Li6Gd(BO3)(3) and potassium (KH2PO4 (KDP)) and ammonium (NH4H2PO4 (ADP)) dihydrogen phosphates in the visible and ultraviolet spectral regions are analyzed using the theory of diffusion-controlled tunneling recombination. A nanosecond pulsed radiation action on these crystals is shown to form defect pairs, such as polaron-type hole centers and electron centers based on interstitial cations. The relaxation kinetics of these centers over a wide time range of 10(-8)-10 s is described by a proposed model of tunneling electron transfer between antimorphous defects in the cation sublattice under the thermally stimulated mobility of recombination partners. The numerical values of the kinetic parameters are determined and the time dependences of the reaction rate constants are calculated for all crystals under study. As a result, the dynamics of change in the optical properties of these crystals under a pulsed radiation action can be simulated.

Author keywords:

SELF-TRAPPED EXCITONS; RESOLVED LUMINESCENCE SPECTROSCOPY; POTASSIUM DIHYDROGEN PHOSPHATE; KH2PO4 CRYSTALS; LITHIUM TETRABORATE; NONLINEAR CRYSTALS; NH4H2PO4 CRYSTALS; LATTICE-DEFECTS; LIB3O5 CRYSTALS; ADP NH4H2PO4

DOI:

10.1134/S1063776112060118

Web of Science ID:

ISI:000307534200015

Соавторы в МНС:

Другие поля

Поле	Значение
Month	JUL
Publisher	MAIK NAUKA/INTERPERIODICA/SPRINGER
Address	233 SPRING ST, NEW YORK, NY 10013-1578 USA
Language	English
Keywords-Plus	SELF-TRAPPED EXCITONS; RESOLVED LUMINESCENCE SPECTROSCOPY; POTASSIUM DIHYDROGEN PHOSPHATE; KH2PO4 CRYSTALS; LITHIUM TETRABORATE; NONLINEAR CRYSTALS; NH4H2PO4 CRYSTALS; LATTICE-DEFECTS; LIB3O5 CRYSTALS; ADP NH4H2PO4
Research-Areas	Physics
Web-of-Science-Categories	Physics, Multidisciplinary
Author-Email	igor.ogorodnikov@bk.ru
ResearcherID-Numbers	Ogorodnikov, Igor/B-4162-2011
ORCID-Numbers	Ogorodnikov, Igor/0000-0002-4700-2340
Number-of-Cited-References	51
Usage-Count-Last-180-days	2
Usage-Count-Since-2013	17
Journal-ISO	J. Exp. Theor. Phys.
Doc-Delivery-Number	989BC