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中文摘要：
采用高温固相法制备了Dy3＋掺杂的Sr1-xCaxMoO4荧光粉。利用XRD、SEM、激发发射光谱以及色参数等研究了所制备荧光粉的结构和发光性能以及x值对荧光粉性能的影响。XRD图像表明当x=1和x=0时样品为CaMoO4和SrMoO4单一相。SEM图像表明在750℃下煅烧3h制备的样品粒径为0.2～1.0μm,适合固态发光器件的要求。监测576nm得到的样品的激发光谱由250～340nm之间的一个宽带和340～460nm之间的一系列尖峰组成。改变Sr/Ca的值,电荷迁移带激发峰位置发生变化,而窄带跃迁的激发峰强度发生变化。用350nm波长激发样品得到的发射谱由峰值位于480和576nm的两个窄带组成,它们是由4 F9/2→6 H15/2和4 F9/2→6 H13/2跃迁引起的。黄色发射峰和蓝色发射峰的强度比Y/B随着Sr/Ca比值的变化而变化。
英文摘要：
Dy3＋ doped Sr1-xCaxMoO4 phosphors were prepared by solid state method in the present paper.The crystal structure,luminescent properties and the effect of x on the luminescent properties were studied by XRD,SEM,excitation,emission and color parameters.The XRD patterns indicated that the samples were single phase of CaMoO4 and SrMoO4 when x=1 and x=0.It can be seen that the crystal size of samples prepared at 750 ℃ for 3 h were 0.2～1.0 μm,which was matched with solid state luminescent device.The excitation spectra monitored at 576 nm were composed of a broad band at 250～340 nm and a series of narrow band at 340～460 nm.The excitation peaks situation of CT transition and the excitation peaks intensity of narrow bands varied with Sr/Ca.The emission spectra excited by 350 nm were composed of two broad bands at 470 and 576 nm,which were attributed to the transition of 4F9/2→6H15/2 and 4F9/2→6H13/2.The emission intensity of yellow and blue emission varied with the value of Sr/Ca.
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