用高温固相法在N2/H2=95/5(v/v)还原气氛下合成了Li2SrSiO4:Eu2+,Tb3+荧光粉发光材料,通过荧光光谱研究其发光特性,并从理论上探讨了Eu2+与Tb3+之间的能量转移类型.结果表明:该发光材料主发射峰值550nm,与EEu2+在4f7- 4f65d1产生跃迁有关；通过掺杂,共存于Li2SrSiO4基质中的Tb3+通过电多级相互作用将能量传递给Eu2+；在500～ 650nm范围内对Eu2+有很强的敏化作用,使其在主发射峰550nm的发射强度显著增强；当名义化学组成为Li2Sr0.996SiO4:0.005Eu2+,0.010Tb3+时,发光强度为最佳.%U2SrSi04:Eu2*,Tb9f phosphor was prepared by solid-state reaction at a high temperature in the reducing atmosphere [IV H2 = 95/ 5 (v/ v)]. The luminescence characteristics and the energy transfer between Eu2* and Tb3+ in LijSrSiCU phosphor were discussed by means of the spectrofluorometry. The results indicated that in UjSrSiOj host the Eu2* emission was mainly from 4f - 4f"5d1 transitions and possible to be sensitized by Tb3*. The observed strong enhancement of the Eu2* emission for introducing Tb3* is attributed to the energy transfer effect from Tb3* to Eu2* through the electric multipolar interaction. Compared with Eu-doped USrSiO* the luminescence intensity of Eu2* and Tb3* co-doped phosphor was significantly improved. The maximum emission intensity could be achieved when the content of Eu2' equaled 0.005 and Tb3* equaled 0.010.
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