Color-tunable up-conversion emission in Y2O3:Yb3+, Er3+ nanoparticles prepared by polymer complex solution method

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Abstract

Powders of Y ₂O ₃ co-doped with Yb ³⁺ and Er ³⁺ composed of well-crystallized nanoparticles (30 to 50 nm in diameter) with no adsorbed ligand species on their surface are prepared by polymer complex solution method. These powders exhibit up-conversion emission upon 978-nm excitation with a color that can be tuned from green to red by changing the Yb ³⁺/Er ³⁺ concentration ratio. The mechanism underlying up-conversion color changes is presented along with material structural and optical properties.

PACS

42.70.-a, 78.55.Hx, 78.60.-b

Related collections

Most cited references 18

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Upconverting nanoparticles.

Markus Haase, Helmut Schäfer (2011)

Upconversion (UC) refers to nonlinear optical processes in which the sequential absorption of two or more photons leads to the emission of light at shorter wavelength than the excitation wavelength (anti-Stokes type emission). In contrast to other emission processes based on multiphoton absorption, upconversion can be efficiently excited even at low excitation densities. The most efficient UC mechanisms are present in solid-state materials doped with rare-earth ions. The development of nanocrystal research has evoked increasing interest in the development of synthesis routes which allow the synthesis of highly efficient, small UC particles with narrow size distribution able to form transparent solutions in a wide range of solvents. Meanwhile, high-quality UC nanocrystals can be routinely synthesized and their solubility, particle size, crystallographic phase, optical properties and shape can be controlled. In recent years, these particles have been discussed as promising alternatives to organic fluorophosphors and quantum dots in the field of medical imaging. Copyright © 2011 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.

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Near-infrared (NIR) to red and green up-conversion emission from silica sol-gel thin films made with La(0.45)Yb(0.50)Er(0.05)F(3) nanoparticles, hetero-looping-enhanced energy transfer (Hetero-LEET): a new up-conversion process.

S. Sivakumar, Jaya P Stanley-Ponniah, Marry van den Heuvel-Eibrink (2007)

Bright green and red luminescence has been generated with a 980 nm diode laser from silica sol-gel thin films made with La0.45Yb0.50Er0.05F3 nanoparticles through a newly described hetero-looping-enhanced energy-transfer (hetero-LEET) up-conversion process, which exhibits a power dependence similar to that of a photon avalanche (PA). The hetero-LEET mechanism is potentially more efficient than PA, ground-state absorption/excited-state absorption (GSA/ESA), and energy-transfer (ETU) mechanisms because it combines resonant ground-state absorption with a looping or feedback process.

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Optical Spectroscopy and Upconversion Studies of Ho3+-Doped Bulk and Nanocrystalline Y2O3

J Boyer, J. Capobianco, F. Vetrone … (2002)

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Author and article information

Journal

Journal ID (nlm-ta): Nanoscale Res Lett

Journal ID (iso-abbrev): Nanoscale Res Lett

Title: Nanoscale Research Letters

Publisher: Springer

ISSN (Print): 1931-7573

ISSN (Electronic): 1556-276X

Publication date Collection: 2013

Publication date (Electronic): 22 March 2013

Volume: 8

Issue: 1

Page: 131

Affiliations

[1 ]Vinča Institute of Nuclear Sciences, University of Belgrade, P.O. Box 522, Belgrade, 11001, Serbia

[2 ]South Dakota School of Mines & Technology, Rapid City, SD, 57701, USA

Article

Publisher ID: 1556-276X-8-131

DOI: 10.1186/1556-276X-8-131

PMC ID: 3765681

PubMed ID: 23522083

SO-VID: e68943c7-8b59-4d65-bc0c-78ffc7298c81

License:

This is an Open Access article distributed under the terms of the Creative Commons Attribution License ( http://creativecommons.org/licenses/by/2.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.