Low temperature photoluminescence study of Ce3+ and Eu2+ ions doped SrF2 nanocrystals

The photoluminescence properties of Eu²⁺ and Ce³⁺ doped SrF₂ have been reported at room temperature and 77 K. The emission spectra of Eu²⁺ ions in SrF₂ consisted of a broad band assigned to the 5d-4f transition of the Eu²⁺ ion. Ce³⁺ ions in SrF₂ showed a weak emission intensity. The emission intensity of Eu²⁺ ion was greatly enhanced at 77 K. At room temperature and 77 K, the fluorescence decay of Eu²⁺ and Ce³⁺ ions in SrF₂ have been measured and the fluorescence decay curve have been reported.