论文部分内容阅读
采用溶胶-凝胶法制备了CaSiO_3∶Eu~(3+)荧光粉,通过对样品的X射线衍射谱及光致发光光谱的测试和表征,研究了不同Eu~(3+)和电荷补偿剂Li+浓度下,CaSiO_3∶Eu~(3+)荧光粉的物相结构和发光性能。结果显示CaSiO_3∶Eu~(3+)荧光粉发射光谱是由位于595nm和614nm处的主峰构成的双峰谱线,激发光谱为多峰宽谱,谱峰位于220~280nm范围内。Eu~(3+)含量对CaSiO_3∶Eu~(3+)发光性能有明显的影响,随Eu~(3+)浓度的增大,CaSiO_3∶Eu~(3+)的发光强度呈现先增大后减小的规律,Eu~(3+)浓度为1%(摩尔分数,下同)时,发光强度最大。电荷补偿剂Li~+可以显著提高CaSiO_3∶Eu~(3+)的发光强度,当Li~+浓度为4%时,增强效果最为显著。
The CaSiO 3: Eu 3+ phosphor was prepared by sol-gel method. The X-ray diffraction and photoluminescence spectra of the sample were characterized by X-ray diffraction and photoluminescence spectroscopy. The effects of different Eu 3+ and charge compensators Structure and Luminescence Properties of CaSiO_3: Eu ~ (3 +) Phosphors at Li + Concentration. The results show that the emission spectrum of CaSiO 3: Eu 3+ phosphor is a doublet peak composed of the main peaks at 595 nm and 614 nm. The excitation spectrum is multimodal and broad spectrum with the peak located in the range of 220-280 nm. The Eu 3+ content has a significant effect on the luminescence properties of CaSiO 3: Eu 3+. With the increase of Eu 3+ concentration, the luminescence intensity of CaSiO 3: Eu 3+ increased first After the reduction, Eu ~ (3 +) concentration of 1% (molar fraction, the same below), the maximum luminous intensity. The charge compensation Li ~ + can significantly improve the luminescence intensity of CaSiO_3: Eu ~ (3+). When Li ~ + concentration is 4%, the enhancement effect is the most significant.