Tuning from green to red the upconversion emission of Y2O3:Er3+–Yb3+ nanophosphors

In this work, the structural, morphological and luminescent properties of Y 2 O 3 nanophosphors doped with Er 3+ (1 mol%) and different Yb 3+ concentrations (2–12 mol%) have been studied. Those nanophosphors were synthesized using a simple hydrothermal method. XRD analysis indicates that all the sam...

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Veröffentlicht in:Applied physics. A, Materials science & processing Materials science & processing, 2017-01, Vol.123 (1), p.1-8, Article 25
Hauptverfasser: Diaz-Torres, L. A., Salas, P., Oliva, J., Resendiz-L, E., Rodriguez-Gonzalez, C., Meza, O.
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container_title Applied physics. A, Materials science & processing
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creator Diaz-Torres, L. A.
Salas, P.
Oliva, J.
Resendiz-L, E.
Rodriguez-Gonzalez, C.
Meza, O.
description In this work, the structural, morphological and luminescent properties of Y 2 O 3 nanophosphors doped with Er 3+ (1 mol%) and different Yb 3+ concentrations (2–12 mol%) have been studied. Those nanophosphors were synthesized using a simple hydrothermal method. XRD analysis indicates that all the samples presented a pure cubic phase even for Yb concentrations as high as 12 mol%. In addition, SEM images show nanoparticles with quasi-spherical shapes with average sizes in the range of 300–340 nm. Photoluminescence measurements obtained after excitation at 967 nm revealed that our samples have strong green (563 nm) and red emissions (660 nm) corresponding to 2 H 11/2  +  4 S 3/2  →  4 I 15/2 and 4 F 9/2  →  4 I 15/2 transitions of Er 3+ ions, respectively. We also observed that the green band is quenched and the red emission enhanced as the Yb concentration increases. In consequence, the CIE coordinates changed from (0.35, 0.64) in the green region to (0.59, 0.39) in the red region. Thus, the tuning properties of Y 2 O 3 nanophosphors suggest that they are good candidates for applications in lighting.
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subjects Applied physics
Characterization and Evaluation of Materials
Condensed Matter Physics
Erbium
Machines
Manufacturing
Materials science
Nanoparticles
Nanophosphors
Nanotechnology
Optical and Electronic Materials
Photoluminescence
Physics
Physics and Astronomy
Processes
Surfaces and Interfaces
Thin Films
Ytterbium
Yttrium oxide
title Tuning from green to red the upconversion emission of Y2O3:Er3+–Yb3+ nanophosphors
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