Luminescent defects in nanostructured silica / Kortov V. S.,Zatsepin A. F.,Gorbunov S. V.,Murzakaev A. M. // PHYSICS OF THE SOLID STATE. - 2006. - V. 48, l. 7. - P. 1273-1279.

ISSN/EISSN:

1063-7834 / нет данных

Type:

Article

Abstract:

The spectral and kinetic properties of excited states of luminescent defects (oxygen-deficient centers) in SiO2 ceramics are studied using pulsed cathodoluminescence and time-resolved photoluminescence. It is found that, in nanostructured samples prepared by thermal decomposition of polysilazane in air, there can exist modifications of oxygen-deficient centers in the form of surface analogs of either neutral oxygen monovacancies Si-Si ( Ge-Ge ) or twofold-coordinated silicon atoms =Si: (=Ge:). Photoluminescence of these centers is efficiently excited in the optical absorption bands of E-s surface centers and silicon clusters SiSiSi and can be associated with the intercenter energy transfer in the course of their nonradiative relaxation. The photoluminescence and excitation spectra indicate thermally induced conversion of different types of oxygen-deficient centers. The specific features of the thermally induced changes in the luminescence characteristics of the defects due to the transformation of the structure of the silica samples from amorphous to partially crystalline are revealed from analyzing the spectral composition and decay kinetics of pulsed cathodoluminescence.

Author keywords:

SIO2 LAYERS; RADIATION; CENTERS; GLASSES; DIOXIDE; IONS; SI+

DOI:

10.1134/S1063783406070092

Web of Science ID:

ISI:000239281900009

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	SIO2 LAYERS; RADIATION; CENTERS; GLASSES; DIOXIDE; IONS; SI+
Research-Areas	Physics
Web-of-Science-Categories	Physics, Condensed Matter
Author-Email	zats@dpt.ustu.ru
ResearcherID-Numbers	Zatsepin, Anatoly/L-7335-2016
ORCID-Numbers	Zatsepin, Anatoly/0000-0001-9539-2403
Number-of-Cited-References	15
Usage-Count-Last-180-days	2
Usage-Count-Since-2013	8
Journal-ISO	Phys. Solid State
Doc-Delivery-Number	067DM