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采用溶胶-凝胶法制备了系列Eu~(3+)激活的红色荧光粉Ca_8Mg(SiO_4)_4Cl_2:Eu~(3+)。通过X射线粉末衍射、环境扫描电子显微镜和荧光光谱等对样品进行了表征,研究了Eu~(3+)掺杂量、添加不同电荷补偿剂(Li+、Na+、K+)对样品发光强度的影响。结果表明:该系列荧光粉能被393 nm的近紫外光有效激发,发射出波长为615 nm的红光;Eu~(3+)的最佳掺杂量为3%(摩尔分数),添加电荷补偿剂Na+可以显著提高其荧光强度。经计算,Ca_8Mg(SiO_4)_4Cl2:3%Eu~(3+)样品的色坐标为(x=0.641,y=0.358),位于1931-色度图的红光区域。
A series of Eu 3+ -activated red phosphors Ca_8Mg (SiO_4) _4Cl_2: Eu ~ (3+) were prepared by sol-gel method. The samples were characterized by X-ray powder diffraction, environmental scanning electron microscopy and fluorescence spectroscopy. The effects of Eu 3+ doping and different charge compensation agents (Li +, Na +, K +) on the luminescence intensity of samples were studied . The results show that this series of phosphors can be effectively excited by 393 nm near-UV light and emit red light with a wavelength of 615 nm. The optimal doping amount of Eu 3+ is 3% (mole fraction) Compensator Na + can significantly increase its fluorescence intensity. The calculated color coordinates of the sample Ca_8Mg (SiO_4) _4Cl2: 3% Eu ~ (3+) are (x = 0.641, y = 0.358) and are located in the red region of the 1931- chromaticity diagram.