Low-energy charge transfer excitations in NiO / Sokolov V. I.,Pustovarov V. A.,Churmanov V. N.,Ivanov V. Yu,Yermakov A. Ye,Uimin M. A.,Gruzdev N. B.,Sokolov P. S.,Baranov A. N.,Moskvin A. S. // . - 2012. - V. 38, l. .

ISSN/EISSN:

1757-8981 / нет данных

Type:

Proceedings Paper

Abstract:

Comparative analysis of photoluminescence (PL) and photoluminescence excitation (PLE) spectra of NiO poly- and nanocrystals in the spectral range 2-5.5 eV reveals two PLE bands peaked near 3.7 and 4.6 eV with a dramatic rise in the low-temperature PLE spectral weight of the 3.7 eV PLE band in the nanocrystalline NiO as compared with its polycrystalline counterpart. In frames of a cluster model approach we assign the 3.7 eV PLE band to the low-energy bulk-forbidden p-d (t(1g)(pi)-e(g)) charge transfer (CT) transition which becomes the allowed one in the nanocrystalline state while the 4.6 eV PLE band is related to a bulk allowed d-d (eg-eg) CT transition scarcely susceptible to the nanocrystallization. The PLE spectroscopy of the nanocrystalline materials appears to be a novel informative technique for inspection of different CT transitions.

Author keywords:

OPTICAL-PROPERTIES; ELECTRONIC-STRUCTURE; ELECTROREFLECTANCE; OXIDE; ZNO

DOI:

10.1088/1757-899X/38/1/012007

Web of Science ID:

ISI:000309665200007

Соавторы в МНС:

Другие поля

Поле	Значение
Book-Group-Author	IOP
Booktitle	INTERNATIONAL CONFERENCE ON FUNCTIONAL MATERIALS AND NANOTECHNOLOGIES (FM\&NT2012)
Series	IOP Conference Series-Materials Science and Engineering
Note	International Conference on Functional Materials and Nanotechnologies (FMandNT), Univ Latvia, Inst Solild State Phys (ISSP UL), Riga, LATVIA, APR 17-20, 2012
Organization	Mat Sci \& Informat Technol Latvia, Natl Res Programme
Publisher	IOP PUBLISHING LTD
Address	DIRAC HOUSE, TEMPLE BACK, BRISTOL BS1 6BE, ENGLAND
Language	English
Article-Number	012007
Keywords-Plus	OPTICAL-PROPERTIES; ELECTRONIC-STRUCTURE; ELECTROREFLECTANCE; OXIDE; ZNO
Research-Areas	Science \& Technology - Other Topics; Materials Science
Web-of-Science-Categories	Nanoscience \& Nanotechnology; Materials Science, Multidisciplinary
Author-Email	alexandr.moskvin@usu.ru
ResearcherID-Numbers	Sokolov, Viktor/J-9376-2013 Gruzdev, Nikita/J-9311-2013 Yermakov, Anatoly/J-5185-2013 Sokolov, Petr/E-8376-2011 Uimin, Mikhail/K-1319-2013
ORCID-Numbers	Sokolov, Viktor/0000-0002-6252-8914 Gruzdev, Nikita/0000-0001-7563-6685 Yermakov, Anatoly/0000-0001-6466-7064 Sokolov, Petr/0000-0003-3516-3953 Uimin, Mikhail/0000-0003-3906-8101
Funding-Acknowledgement	Ural Branch RAS {[}12-U-2-1030]; RFBR {[}10-02-96032, 12-02-01039]
Funding-Text	The authors are grateful to R.V. Pisarev for stimulating discussions. This work was partially supported by the Ural Branch RAS (Grant No. 12-U-2-1030) and RFBR (Grants No. 10-02-96032 and 12-02-01039).
Number-of-Cited-References	26
Usage-Count-Last-180-days	1
Usage-Count-Since-2013	8
Doc-Delivery-Number	BCB66