Template-free Fabrication and Luminescent Characterization of Highly Uniform and Monodisperse Y₂O₂S:Sm³⁺ Hollow Submicrospheres

S.Q.Deng,Z.P.Xue,Y.H.Yang,Q.Yang and Y.L.Liu Department of Chemistry,Jinan University,Guangzhou 510632,China

摘 要：Well dispersed and homogeneous Y2O2S:Sm3+ hollow submicrospheres were successfully achieved by a templatefree solvothermal method combining with a postcalcining process.The crystalstructure and particle morphology were investigated by the X-ray diffraction（XRD）,Fourier transform infrared（FT-IR） spectra,scanning and transmission electron microscopy（SEM and TEM）,respectively.A possible growth mechanism was proposed to reveal the formation process.Luminescence properties of the Y2O2S:Sm3+ long-lasting phosphor were analyzed by measuring the excitation spectra,emission spectra,afterglow decay curve and thermoluminescence curve.The excitation spectra indicated that the phosphor could be excited effectively by the ultraviolet-light emitting diode（UV-LED） or blue LED,and the emission spectra showed that the phosphor could emit red light from 600 to 650 nm.

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