Non-radiative relaxation of excited states of non-bridging oxygen hole centers in silica / Zatsepin A. F.,Kortov V. S.,Biryukov D. Yu. // . - 2007. - V. 4, l. 3. - P. 789+.

ISSN/EISSN:

1862-6351 / нет данных

Type:

Proceedings Paper

Abstract:

Processes involved in the excited-state relaxation of non-bridging oxygen hole centers (NBOHCs) were studied in glassy SiO2 using luminescence, optical absorption and photoelectron emission. spectroscopy. It was shown that photoexcited NBOHCs generally have three channels of relaxation. Along with radiative transitions responsible for the luminescence band at 1.9 eV, two non-radiative channels caused by transitions between levels of photoexcited state were observed. The first non-radiative channel was connected with transformation of the electron excitation energy to thermal lattice vibrations and represented an intracenter process of NBOHC luminescence quenching (the activation barrier was 0.05 eV). The second non-radiative relaxation channel for excited NBOHCs was identified as thermally activated external luminescence quenching with the energy barrier of 0.46 eV. As a result of realization of the specified process, the transfer of the excitation energy from NBOHCs to oxygen-deficient centers (ODCs) acting as electron emitters took place. (c) 2007 WILEY-VCH Verlag GmbH \& Co. KGaA, Weinheim.

Author keywords:

ELECTRON-EMISSION

DOI:

10.1002/pssc.200673701

Web of Science ID:

ISI:000246104300020

Соавторы в МНС:

Другие поля

Поле	Значение
Editor	Stutzmann, M
Booktitle	PHYSICA STATUS SOLIDI C - CURRENT TOPICS IN SOLID STATE PHYSICS, VOL 4, NO 3
Series	Physica Status Solidi C-Current Topics in Solid State Physics
Note	10th Europhysical Conference on Defects in Insulating Materials, Milan, ITALY, JUL 10-14, 2006
Publisher	WILEY-V C H VERLAG GMBH
Address	PAPPELALLEE 3, W-69469 WEINHEIM, GERMANY
Language	English
Keywords-Plus	ELECTRON-EMISSION
Research-Areas	Materials Science; Physics
Web-of-Science-Categories	Materials Science, Multidisciplinary; Physics, Condensed Matter
Author-Email	zats@dpt.ustu.ru
ResearcherID-Numbers	Zatsepin, Anatoly/L-7335-2016
ORCID-Numbers	Zatsepin, Anatoly/0000-0001-9539-2403
Funding-Acknowledgement	US CRDF {[}REC-005, EK-005-X1, BRHE Y3-EP-05-05]; RFBR {[}04-02-96073]; Russian Federation Ministry of Education {[}RNP.2.1.1.2948]
Funding-Text	This work was supported in part by US CRDF (REC-005, EK-005-X1, BRHE Y3-EP-05-05), RFBR (Grant 04-02-96073) and Russian Federation Ministry of Education (Project RNP.2.1.1.2948).
Number-of-Cited-References	6
Doc-Delivery-Number	BGD08