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Uniform YF 3 :Eu 3+ phosphors with different sizes and morphologies have been prepared via a simple wet-chemical route at ambient pressure and low temperature, without any catalyst, template, or substrate. The morphologies of the YF 3 :Eu 3+ samples can be changed by easily tuning the reaction temperature and fluoride source. The as-obtained YF 3 :Eu 3+ samples exhibit orange-red emission corresponding to the 5 D 0 -7 F 1 transition of the Eu 3+ ions under UV excitation, which indicates that the Eu 3+ locates in a site with inversion symmetry in the YF 3 matrix. After a calcination treatment, the particle size, morphology, and dispersion of the YF 3 :Eu 3+ samples are preserved, but the crystallinity noticeably enhances. This general, simple, and low-cost method may be of much significance in the synthesis of other lanthanide fluorides with various sizes and morphologies.

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