Photo- and radioluminescence of lithium hafnate Li2HfO3 / Baklanova Ya V.,Ishchenko A. V.,Denisova T. A.,Maksimova L. G.,Shulgin B. V.,Pustovarov V. A.,Viktorov L. V. // OPTICAL MATERIALS. - 2012. - V. 34, l. 7. - P. 1037-1041.

ISSN/EISSN:

0925-3467 / нет данных

Type:

Article

Abstract:

Photoluminescence, excitation and pulse cathode luminescence spectra, and decay kinetics of lithium hafnate Li2HfO3 were investigated at temperatures 300 and 7.5 K. Time-resolved luminescence spectra were excited with synchrotron radiation in UV-VUV range. Strong emission with the peak position at 4.42 eV and with the decay time in mu s range was revealed at T= 7.5 K. The emission was attributed to radiative decay of self-trapped excitons (STE). The features observed in the excitation spectra at 6.6 eV were likely to take place because of the exciton formation, with inter-band transitions dominating at 6.7 eV. Crystal structure defects underpin the luminescence spectra formation at room temperature in the frame of vacancy model. Crown Copyright (C) 2012 Published by Elsevier B.V. All rights reserved.

Author keywords:

Lithium hafnate; Time-resolved spectroscopy; Low-temperature luminescence VUV; spectroscopy; Radioluminescence; Scintillator; Self-trapped excitons PROFILE REFINEMENT; THIN-FILMS; SCINTILLATORS; HFO2; ZRO2

DOI:

10.1016/j.optmat.2011.12.024

Web of Science ID:

ISI:000303071500008

Соавторы в МНС:

Другие поля

Поле	Значение
Month	MAY
Publisher	ELSEVIER SCIENCE BV
Address	PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
Language	English
Keywords-Plus	PROFILE REFINEMENT; THIN-FILMS; SCINTILLATORS; HFO2; ZRO2
Research-Areas	Materials Science; Optics
Web-of-Science-Categories	Materials Science, Multidisciplinary; Optics
Author-Email	baklanovay@ihim.uran.ru
ResearcherID-Numbers	Ishchenko, Aleksey/E-1017-2014
ORCID-Numbers	Ishchenko, Aleksey/0000-0002-9883-6652
Funding-Acknowledgement	UB RAS; Federal Target Program
Funding-Text	This work was supported by grants of the UB RAS and the Federal Target Program ``Scientific and scientific-pedagogical staff of innovative Russia{''}. The authors are grateful to O.A. Kaigorodova for assistance in measurement of PCL parameters with the use of the KLAVI-R facility. Particular thanks are given to Dr. N.V. Tarakina for his valuable help in the SEM data collection.
Number-of-Cited-References	20
Usage-Count-Since-2013	23
Journal-ISO	Opt. Mater.
Doc-Delivery-Number	929NF