采用溶胶-凝胶法制备了Ca₃SiO₅:Eu²⁺发光材料。测量了材料的激发与发射光谱,结果显示,材料的发射光谱为一峰值位于505 nm处的不对称的宽带谱;监测505 nm发射峰,所得材料的激发光谱为一双峰宽谱,峰值为374和397 nm。研究了合成条件对Ca₃SiO₅:Eu²⁺材料发射光谱的影响,结果显示,随合成温度或合成时间或Eu2+ 浓度的增大,Ca₃SiO₅:Eu²⁺材料发射光谱峰值强度均表现出先增大后减小的趋势,当合成温度为1 100 ℃、合成时间为4 h、Eu2+ 浓度为0.5 mol%时,Ca₃SiO₅:Eu²⁺材料发射光谱峰值强度最大。

The Ca₃SiO₅:Eu²⁺ phosphor was synthesized by the sol-gel reaction method.The emission spectrum was measured by a SPEX1404 spectrophotometer,and the excitation spectrum was measured by a SHIMADZU RF-540 ultraviolet spectrophotometer.All the characterization of the phosphors was conducted at room temperature.The results show that the emission spectrum of Ca₃SiO₅:Eu²⁺ phosphor exhibits one asymmetry band centred at 505 nm under the 365 nm excitation,and the excitation spectrum for 505 nm indicates two bands centred at 374 and 397 nm,respectively.The above results indicate that the phosphor used for w-LEDs can be excited by UV light,and emit green light.The effect of synthesis condition,such as synthesis temperature,synthesis time and Eu2+ concentration,on the emission spectrum of Ca₃SiO₅:Eu²⁺ phosphor was investigated.The results show that the emission peak intensity of Ca₃SiO₅:Eu²⁺ phosphor firstly increases,then decreases with the increase in synthesis temperature or synthesis time or Eu2+ concentration,and reaches the maximum value at 1 100 ℃,for 4 h and 0.5 mol% Eu2+.