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Emission properties of Ln (Eu, Tb, Dy, Er)-doped Y2O3 nanoparticles synthesized by surfactant-assembly and their applications in visible color-tuning

Paper ID Volume ID Publish Year Pages File Format Full-Text
26398 43950 2015 7 PDF Available
Title
Emission properties of Ln (Eu, Tb, Dy, Er)-doped Y2O3 nanoparticles synthesized by surfactant-assembly and their applications in visible color-tuning
Abstract

•Emitting Ln3+ ions are doped in Y2O3 particles with diameter of ∼500 nm.•Under UV excitation, Ln3+ exhibits 4f–4f emission in the nano environment.•Eu–Tb co-doped particles show emission-color variation with excitation wavelength.•An additive color-tuning is proved by the CIE chromaticity diagram.

We have prepared lanthanoid (Ln = Eu, Tb, Dy, and Er)-doped Y2O3 nanoparticles (YNPs) for producing nanomaterials showing emission in the visible region. YNPs were fabricated by means of surfactant assembly, and they had a diameter of 500 ± 200 nm. Under UV excitation, Ln-doped YNPs showed sharp emission spectra due to the 4f–4f transitions of Ln3+ in the YNP environment. The photoexcitation spectra of Ln-doped YNP comprised 4f–4f transitions and Ln3+ 4f–5d transitions, or charge transfer from the Y2O3 matrix to Ln3+; the bands in the latter case were broad. By appropriate choice of the excitation wavelength (λex), either Eu3+ or Tb3+ could be dominantly excited in the Eu3+ and Tb3+ co-doped YNP. At an appropriate λex, the co-doped YNP showed emission in the orange and green regions due to Eu3+ and Tb3+, respectively; alternatively, an intermediate color resulted because of additive color-tuning of the resources. The emission color can also be varied by changing the Eu–Tb doping ratio in the YNP, under a fixed λex. It was demonstrated that Eu3+ and Tb3+ emit almost independently, which makes such a color-tuning process feasible.

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Keywords
Nanoparticles; Rare-earth emission; Additive color-tuning; Surfactant-assembly
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Emission properties of Ln (Eu, Tb, Dy, Er)-doped Y2O3 nanoparticles synthesized by surfactant-assembly and their applications in visible color-tuning
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Publisher
Database: Elsevier - ScienceDirect
Journal: Journal of Photochemistry and Photobiology A: Chemistry - Volume 299, 15 February 2015, Pages 87–93
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Bioengineering
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us