NaCa_(1-x-y)Ba_yPO_4:Eu_x^(3+)红色荧光粉的合成及发光性质研究

Synthesis and Photoluminescence of NaCa_(1-x-y)Ba_yPO_4:Eu_x^(3+) Phosphors

采用高温固相法制备了可被近紫外光有效激发的NaCa1-x-yBayPO4:Eux3+(0.00≤x≤1.00)荧光粉。分别探讨了不同Eu3+掺杂量对NaCaPO4:Eu3+、NaBaPO4:Eu3+荧光粉发光强度的影响,以及改变Ca2+、Ba2+浓度对NaCa0.94-xBaxPO4:Eu30.+06(x=0.1、0.3、0.5、0.7、0.9)荧光粉发光性质的影响。对样品分别进行了X-射线衍射(XRD)和荧光光谱的测定。XRD结果表明,当烧结温度为900℃时,可以分别得到NaCaPO4和NaBaPO4的纯相;荧光光谱实验测定,NaCa1-x-y BayPO4:Eux3+能够被395nm的紫外光激发,在613nm和595nm处发出强烈的红色和橙色荧光,并且通过调节Ca2+、Ba2+的浓度比例,可以有效控制其发射强度比。

NaCa1-x-yBayPO4：Eux3 ＋（0.00≤x≤1.00） phosphors had been prepared by solid-state reaction at high-temperature and characterized by powder diffraction（XRD） and fluorescence spectrophotometer.The effect of Eu3 ＋ concentration on luminescent intensity of NaCaPO4 ：Eu3 ＋ and NaBaPO4 ：Eu3 ＋ phosphors and the luminescent properties of NaCa0.94-xBaxPO4 ：Eu30.＋06（x = 0.1,0.3,0.5,0.7,0.9） were discussed.The results of XRD showed that NaCaPO4 and NaBaPO4 pure phase had been synthesized after calcining at 900 ℃.Determination of fluorescence intensity showed that the NaCa1-x-yBayPO4 ：Eux3 ＋ phosphors can be efficiently excited by an ultraviolet（UV） source at 395nm and emitted strong red-emission lines at 613nm and 595nm,which corresponded to the forced electric dipole 5 D0 → 7 F2 transitions and the magnetic dipole transition 5 D0 → 7 F1 transitions on Eu3 ＋,respectively.The ratio of the luminescent intensity of the NaCa1-x-y BayPO4 ： Eux3 ＋ phosphors at 595nm and 613nm can be effective controlled by changing of the concentration of Ba2 ＋ and Ca2 ＋.