Luminescence, energy transfer, and upconversion mechanisms of Y(2)O(3) nanomaterials doped with Eu(3+), Tb(3+), Tm(3+), Er(3+), and Yb(3+) ions

Tran Kim Anh
Paul Benalloul
Charles Barthou
Lam Thi Kieu Giang
Nguyen Vu
Le Quoc Minh

Luminescence, energy transfer, and upconversion mechanisms of nanophosphors (Y(2)O(3) : Eu(3+), Tb(3+), Y(2)O(3) : Tm(3+), Y(2)O(3) : Er(3+), Yb(3+)) both in particle and colloidal forms were studied. The structure, phase, and morphology of the nanopowders and nanocolloidal media were determined by high-resolution TEM and X-ray diffraction. It was shown that the obtained nanoparticles have a round-spherical shape with average size in the range of 4 to 20 nm. Energy transfer was observed for Y(2)O(3) : Eu(3+), Tb(3+) colloidal and powders, upconversion transitions were observed for both Y(2)O(3) : Er(3+) and Y(2)O(3) : Er(3+), Yb(3+) nanophosphors. The dependence of photoluminescence (PL) spectra and decay times on doping concentration has been investigated. The infrared to visible conversion of emission in Y(2)O(3) : Er(3+), Yb(3+) system was analyzed and discussed aiming to be applied in the photonic technology

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Title:	Luminescence, energy transfer, and upconversion mechanisms of Y(2)O(3) nanomaterials doped with Eu(3+), Tb(3+), Tm(3+), Er(3+), and Yb(3+) ions
Authors:	Tran Kim Anh Paul Benalloul Charles Barthou Lam Thi Kieu Giang Nguyen Vu Le Quoc Minh
Keywords:	COMBUSTION SYNTHESIS;OPTICAL-PROPERTIES;PHOTOLUMINESCENT PROPERTIES;NANOCRYSTALLINE Y2O3EU;WAVE-GUIDES;GRAIN-SIZE;EMISSION;SPECTROSCOPY
Issue Date:	2007
Publisher:	HINDAWI PUBLISHING CORPORATION, 410 PARK AVENUE, 15TH FLOOR, #287 PMB, NEW YORK, NY 10022 USA
Citation:	ISIKNOWLEDGE

Description:	JOURNAL OF NANOMATERIALS Article Number: 48247 Published: 2007 ; TNS07659
URI:	http://repository.vnu.edu.vn/handle/VNU_123/31874
ISSN:	1687-4110
Appears in Collections:	Bài báo của ĐHQGHN trong Web of Science