Energy transfer study between Ce3+ and Tb3+ ions in doped and core-shell sodium yttrium fluoride nanocrystals

Nanoscale
Pushpal GhoshAmitava Patra

Abstract

Here, we report the preparation of Ce(3+) and Tb(3+) co-doped sodium yttrium fluoride nanorods and NaYF(4):Ce(3+)/Tb(3+) core-shell nanoparticles by the emulsion method. The core-shell nanoparticles are confirmed by X-ray diffraction study and transmission electron microscopy (TEM) analysis. The hexagonal crystal phase of Ce(3+)-doped sodium yttrium fluoride nanocrystals is converted to the cubic polymorph after surface coating by TbF(3). Cell volume, cell parameters and lattice strain have been modified due to core-shell structure. The decay times are found to be 8.4 ms and 5.4 ms for doped nanorods and core-shell nanoparticles, respectively, which reveals that non-radiative decay is higher in the case of core-shell nanoparticles than doped nanorods. Energy transfer efficiencies from Ce(3+) to Tb(3+)are 65% and 45% for doped Na(Y(1.5)Na (0.5))F(6):Ce:Tb material and NaYF(4):Ce/Tb core-shell materials, respectively. Quantum yields are found to be 75% and 42% for doped and core-shell samples, respectively.

References

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Citations

Mar 29, 2014·Dalton Transactions : an International Journal of Inorganic Chemistry·Chanchal HazraVenkataramanan Mahalingam
Jun 29, 2014·Spectrochimica Acta. Part A, Molecular and Biomolecular Spectroscopy·Chunyan CaoAn Xie
Oct 1, 2011·Dalton Transactions : an International Journal of Inorganic Chemistry·Ganngam PhaomeiR K Vatsa
May 9, 2015·Dalton Transactions : an International Journal of Inorganic Chemistry·Anna M KaczmarekRik Van Deun
Dec 19, 2013·Chemical Society Reviews·Mengmeng ShangJun Lin
Aug 16, 2016·Inorganic Chemistry·Ting LiZhiping Yang
Jul 23, 2019·Luminescence : the Journal of Biological and Chemical Luminescence·Sitakanta PandaB S Panigrahi
Oct 18, 2012·Dalton Transactions : an International Journal of Inorganic Chemistry·Dongling GengJun Lin
Feb 16, 2017·Dalton Transactions : an International Journal of Inorganic Chemistry·Benjamin RitterErhard Kemnitz

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