Transient Optical Absorption and Luminescence in Li(2)B(4)O(7) Lithium Tetraborate / Ogorodnikov I. N.,Yakovlev V. Yu.,Kruzhalov A. V.,Isaenko L. I. // PHYSICS OF THE SOLID STATE. - 2002. - V. 44, l. 6. - P. 1085-1092.

ISSN/EISSN:

1063-7834 / нет данных

Type:

Article

Abstract:

This paper reports on a study of the transient optical absorption exhibited by Li(2)B(4)O(7) (LTB) in the visible and UV spectral regions. Using absorption optical spectroscopy with nanosecond time resolution, it is established that the transient optical absorption (TOA) in these crystals originates from optical transitions in hole centers and that the kinetics of the optical-density relaxation is controlled by interdefect tunneling recombination, which involves these hole centers and electronic Li(0) centers representing neutral lithium atoms. At 290 K, the Li(0) centers migrate in a thermally stimulated, one-dimensional manner, without carrier ejection into the conduction or valence band. The kinetics of the pulsed LTB cathodoluminescence is shown to be controlled by a relaxation process connected with tunneling electron transfer from a deep center to a small hole polaron migrating nearby, a process followed by the formation of a self-trapped exciton (STE) in an excited state. Radiative annihilation of the STE accounts for the characteristic sigma-polarized LTB luminescence at 3.6 eV, whose kinetics is rate-limited by the tunneling electron transfer. (C) 2002 MAIK ``Nauka/Interperiodica{''}.

Author keywords:

нет данных

DOI:

10.1134/1.1485012

Web of Science ID:

ISI:000208106400015

Соавторы в МНС:

Другие поля

Поле	Значение
Month	JUN
Publisher	MAIK NAUKA/INTERPERIODICA/SPRINGER
Address	233 SPRING ST, NEW YORK, NY 10013-1578 USA
Language	English
Research-Areas	Physics
Web-of-Science-Categories	Physics, Condensed Matter
Author-Email	ogo@dpt.ustu.ru
ResearcherID-Numbers	Ogorodnikov, Igor/B-4162-2011 Isaenko, Ludmila/H-7620-2013 Isaenko, Ludmila/A-5272-2014
ORCID-Numbers	Ogorodnikov, Igor/0000-0002-4700-2340
Number-of-Cited-References	38
Usage-Count-Since-2013	4
Journal-ISO	Phys. Solid State
Doc-Delivery-Number	V19XZ