Size-Dependent Photoluminescence of Europium in Alumina Nanoparticles Synthesized by cw CO2 Laser Vaporization | Sciact - CRIS-система Института катализа

Size-Dependent Photoluminescence of Europium in Alumina Nanoparticles Synthesized by cw CO2 Laser Vaporization Научная публикация

Журнал

Journal of Alloys and Compounds
ISSN: 0925-8388 , E-ISSN: 1873-4669

Вых. Данные

Год: 2020, Том: 815, Номер статьи : 152476, Страниц : 12 DOI: 10.1016/j.jallcom.2019.152476

Ключевые слова

Defects; Laser vaporization; Nanosized Al2O3; Photoluminescence of Eu3+ and Eu2+

Авторы

Kostyukov Anton I. ^1,2 , Snytnikov Vladimir N. ¹ , Zhuzhgov Aleksey V. ¹ , Cherepanova Svetlana V. ^1,2 , Ishchenko Arcady V. ^1,2 , Baronskiy Mark G. ¹ , Snytnikov Valeriy N. ^1,2

Организации

1	Boreskov Institute of Catalysis, Lavrentieva Ave. 5, Novosibirsk, 630090, Russian Federation
2	Novosibirsk State University, Pirogova Str. 2, Novosibirsk, 630090, Russian Federation

Информация о финансировании (2)

1	Министерство науки и высшего образования Российской Федерации (с 15 мая 2018)	ГЗ-2017-2020
2	Российский фонд фундаментальных исследований	18-03-00087

Nanosized Eu/γ- and/or η-Al2O3 ([Eu2О3] = 0.00, 0.02, 0.45 and 0.92 wt%) powders with the particle size from <10 nm to 21 nm synthesized by cw CO2 laser vaporization were studied. It was shown that photoluminescence (PL) properties of the obtained samples are caused by luminescence of the Eu3+ and Eu2+ ions incorporated to the Al2O3 matrix in crystallographic positions with the C3v local symmetry. A scheme based on the formation of Eu2+ ions in the Al2O3 lattice via the charge compensation by oxygen vacancies (F centers) located in the first coordination sphere of europium was proposed. The influence of size effects on PL of Eu/Al2O3 nanoparticles consists first of all in shortening the lifetime of 4f – 4f transitions in Eu3+ ions as a result of increased probability of nonradiative relaxation owing to OH groups and various structural defects. It was found that the conditions of laser vaporization (gas composition and pressure) can change the structure of the resulting Eu/Al2O3 nanoparticles.

Kostyukov A.I. , Snytnikov V.N. , Zhuzhgov A.V. , Cherepanova S.V. , Ishchenko A.V. , Baronskiy M.G. , Snytnikov V.N.
Size-Dependent Photoluminescence of Europium in Alumina Nanoparticles Synthesized by cw CO2 Laser Vaporization
Journal of Alloys and Compounds. 2020. V.815. 152476 :1-12. DOI: 10.1016/j.jallcom.2019.152476 WOS Scopus РИНЦ CAPlusCA OpenAlex

Поступила в редакцию:	28 июн. 2019 г.
Принята к публикации:	26 сент. 2019 г.
Опубликована online:	27 сент. 2019 г.
Опубликована в печати:	30 янв. 2020 г.

Web of science:	WOS:000502521900144
Scopus:	2-s2.0-85072755711
РИНЦ:	41695689
Chemical Abstracts:	2019:1897690
Chemical Abstracts (print):	171:483764
OpenAlex:	W2976910796

БД	Цитирований
Scopus	14
Web of science	11
РИНЦ	13
OpenAlex	15