Photoluminescence Imaging of SiO2@Y2O3:Eu(III) and SiO2@Y2O3:Tb(III) Core-Shell Nanostructures


Insu Cho, Jun-Gill Kang, Youngku Sohn, Journal of Information Processing Systems Vol. 35, No. 2, pp. 575-580, Feb. 2014  

https://doi.org/10.5012/bkcs.2014.35.2.575
Keywords: SiO2@Eu(III)-Y2O3, SiO2@Tb(III)-Y2O3, Core-shell, Site symmetry, Photoluminescence imaging
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Abstract

We uniformly coated Eu(III)- and Tb(III)-doped yttrium oxide onto the surface of SiO2 spheres and then characterized them by scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray diffraction crystallography and UV-Visible absorption. 2D and 3D photoluminescence image map profiles were reported for the core-shell type structure. Red emission peaks of Eu(III) were observed between 580 to 730 nm and assigned to 5D0  7FJ (J = 0 – 4) transitions. The green emission peaks of Tb(III) between 450 and 650 nm were attributed to the 5D4 7FJ (J = 6, 5, 4, 3) transitions. For annealed samples, Eu(III) ions were embedded at a C2 symmetry site in Y2O3, which was accompanied by an increase in luminescence intensity and redness, while Tb(III) was changed to Tb(IV), which resulted in no green emission.


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Cite this article
[APA Style]
Cho, I., Kang, J., & Sohn, Y. (2014). Photoluminescence Imaging of SiO2@Y2O3:Eu(III) and SiO2@Y2O3:Tb(III) Core-Shell Nanostructures. Bulletin of the Korean Chemical Society, 35(2), 575-580. DOI: 10.5012/bkcs.2014.35.2.575.

[IEEE Style]
I. Cho, J. Kang, Y. Sohn, "Photoluminescence Imaging of SiO2@Y2O3:Eu(III) and SiO2@Y2O3:Tb(III) Core-Shell Nanostructures," Bulletin of the Korean Chemical Society, vol. 35, no. 2, pp. 575-580, 2014. DOI: 10.5012/bkcs.2014.35.2.575.

[ACM Style]
Insu Cho, Jun-Gill Kang, and Youngku Sohn. 2014. Photoluminescence Imaging of SiO2@Y2O3:Eu(III) and SiO2@Y2O3:Tb(III) Core-Shell Nanostructures. Bulletin of the Korean Chemical Society, 35, 2, (2014), 575-580. DOI: 10.5012/bkcs.2014.35.2.575.