Hydrothermal Synthesis and Characterization of Nanocrystalline Gd₂Sn₂O₇:Eu³⁺ Phosphors

Abstract:

Phase-pure Eu³⁺ doped Gd₂Sn₂O₇ nanocrystals have been successfully synthesized via a co-precipitation processes combined with hydrothermal treatment. The crystal structure, particle size, morphologies, composition, and photoluminescence properties of the as-synthesized products were investigated by XRD, SEM, TEM, EDS and PL. The samples were single-phase cubic pyrochlore-type nanocrystals with a typical size of about 30 - 60 nm. All the samples exhibited irregular flower like secondary nanostructure assembled by primary nanoparticles. Photoluminescence properties of Gd₂Sn₂O₇:Eu³⁺ were investigated, and the results revealed that the as-synthesized materials displayed intense and prevailing emission located at 580 - 630 nm. The excitation spectra indicated that an energy transfer from Gd³⁺ to Eu³⁺ occurred. Meanwhile, the concentration quenching phenomenon was observed in Gd₂Sn₂O₇:Eu³⁺nanocrystals.

• Periodical: Advanced Materials Research (Volumes 239-242)
• Pages: 2851-2854
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.239-242.2851
• Online since: May 2011
• Authors: Jin Yu Yang, Yu Chang Su, Zhuo Chen, Xue Ying Liu
• Keywords: Gadolinium Stannate, Hydrothermal Synthesis, Photoluminescence (PL), Pyrochlore

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