Oxygen Vacancy in Hafnia as a Blue Luminescence Center and a Trap of Charge Carriers / Gritsenko Vladimir A.,Islamov Damir R.,Perevalov Timofey V.,Aliev Vladimir Sh.,Yelisseyev Alexander P.,Lomonova Elena E.,Pustovarov Vladimir A.,Chin Albert // JOURNAL OF PHYSICAL CHEMISTRY C. - 2016. - V. 120, l. 36. - P. 19980-19986.

ISSN/EISSN:

1932-7447 / нет данных

Type:

Article

Abstract:

The electronic properties of HfO2, in particular, luminescence and charge transport, are determined by defects and traps. The origin of luminescence centers and traps of charge carriers in a HfO2 crystal was studied using luminescence spectroscopy, charge transport, and quantum chemical calculation. The 2.7 eV luminescence band and 5.2 eV absorption/luminescence excitation band are associated with an oxygen vacancy. The thermal activation energy 1.25 eV, estimated from the charge transport and thermoluminescence experiment, is equal to half of the Stokes shift in photoluminescence spectra. Hence, oxygen vacancies are supposed to operate as electron traps in HfO2, and the charge transport is described by phonon-assisted tunneling between traps.

Author keywords:

THIN-FILMS; ELECTRONIC-STRUCTURE; OPTICAL-PROPERTIES; HFO2; DEFECTS; OXIDE; IONIZATION; ZIRCONIA

DOI:

10.1021/acs.jpcc.6b05457

Web of Science ID:

ISI:000383641700009

Соавторы в МНС:

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Другие поля

Поле	Значение
Month	SEP 15
Publisher	AMER CHEMICAL SOC
Address	1155 16TH ST, NW, WASHINGTON, DC 20036 USA
Language	English
Keywords-Plus	THIN-FILMS; ELECTRONIC-STRUCTURE; OPTICAL-PROPERTIES; HFO2; DEFECTS; OXIDE; IONIZATION; ZIRCONIA
Research-Areas	Chemistry; Science \& Technology - Other Topics; Materials Science
Web-of-Science-Categories	Chemistry, Physical; Nanoscience \& Nanotechnology; Materials Science, Multidisciplinary
Author-Email	timson@isp.nsc.ru
ResearcherID-Numbers	Islamov, Damir/A-5708-2014 Yelisseyev, Alexander/A-3846-2014 Perevalov, Timofey/H-4243-2017
ORCID-Numbers	Islamov, Damir/0000-0002-5188-7049
Funding-Acknowledgement	Russian Science Foundation {[}14-19-00192]; Ministry of Science and Technology, Taiwan
Funding-Text	This work was supported by the Russian Science Foundation under grant 14-19-00192 (except transport measurements). The works on the transport measurements was supported by the Ministry of Science and Technology, Taiwan. The computations were carried out at the computational cluster of the Novosibirsk State University Supercomputer Center.
Number-of-Cited-References	49
Usage-Count-Last-180-days	10
Usage-Count-Since-2013	19
Journal-ISO	J. Phys. Chem. C
Doc-Delivery-Number	DW4VS