Abstract:The Sr2SiO4∶Dy3+ phosphor was synthesized by the high temperature solid-state reaction method in air. Dy2O3(99.9%), SiO2(99.9%), SrCO3(99.9%), Li2CO3(99.9%), Na2CO3(99.9%) and K2CO3(99.9%) were used as starting materials, and the Dy3+ doping concentration was 2 mol%. The emission spectrum was measured by a SPEX1404 spectrophotometer, and all the characterization of the phosphors was conducted at room temperature. The emission spectrum of Sr2SiO4∶Dy3+ phosphor showed several bands centered at 486, 575 and 665 nm under the 365 nm excitation. The effect of Li+,Na+ and K+ on the emission spectra of Sr2SiO4∶Dy3+ phosphor was studied. The results show that the location of the emission spectrum of Sr2SiO4∶Dy3+ phosphor was not influenced by Li+,Na+ and K+. However, the emission spectrum intensity was greatly influenced by Li+,Na+ and K+,and the evolvement trend was monotone with different charge compensation, i.e. the emission spectrum intensity of Sr2SiO4∶Dy3+ phosphor firstly increased with increasing Li+ concentration, then decreased. However the charge compensation concentration corresponding to the maximum emission intensity was different with different charge compensation, and the concentration is 4, 3 and 3 mol% corresponding to Li+,Na+ and K+,respectively. And the theoretical reason for the above results was analyzed.
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