Sr2SiO4:Eu3+发光材料的制备及其光谱特性

采用溶胶-凝胶法制备了Sr2SiO4:Eu3+发光材料. 测量了Sr2SiO4:Eu3+材料的激发与发射光谱, 发射光谱主峰位于618 nm处；监测618 nm发射峰时, 所得激发光谱主峰分别为320、397、464 和518 nm. 研究了Sr2SiO4:Eu3+材料在618 nm的主发射峰强度随Eu3+浓度的变化情况. 结果显示, 随Eu3+浓度的增大, 发射峰强度先增大; 当Eu3+浓度为7%时(x), 峰值强度最大; 而后随Eu3+浓度的增大, 峰值强度减小. 在Eu3+浓度为7%的情况下, 研究了电荷补偿剂Li+的掺杂浓度(x(Li+))对Sr2SiO4:Eu3+材料发射光谱强度的影响. 结果显示, 随x(Li+)的增大, 材料发射光谱强度先增大后减小, 当x(Li+)为8%时, 峰值强度最大.

Preparation and Spectrum Characteristics of Sr2SiO4:Eu3+ Phosphor

The Sr2SiO4:Eu3+ phosphor was synthesized by sol-gel method. The excitation and emission spectra were investigated. The emission spectrum of Sr2SiO4:Eu3+ showed several bands, and the main peak value was 618 nm. The excitation spectrumfor 618 nm emission had several excitation bands at 320, 397, 464, and 518 nm. The effect of Eu3+ concentration on the emission spectrum intensity of Sr2SiO4:Eu3+ was investigated, and the results showed that the emission spectrumintensity increased with increasing Eu3+ concentration, and reached the maximumvalue at 7%(x) Eu3+, then decreased. Under the condition of doping 7% Eu3 +, the effect of Li + concentration on the emission spectrum intensity of Sr2SiO4:Eu3+ was studied, and the emission spectrum intensity increased with increasing Li+ concentration, and reached the maximumvalue at 8%(x) Li+, then decreased.