采用高温固相法制备了KNaCa2（PO4）2：Dy3＋发光材料并对其发光特性进行了研究。光谱显示，KNaCa2（PO4）2：Dy3＋激发谱为300～500nm范围内的一系列锐谱，可被InGaN管芯和蓝光有效激发。尤其在385nm紫外光激发下，样品呈现较强白光发射，主发射峰位于485和577nm，对应Dy3＋的。F9/2-6H15／2、4F9/2-6H13/2跃迁，形成“黄＋蓝”单一基质白光。研究了Dy3＋掺杂浓度对KNaCa2（PO4）2：Dy3＋发光性能的影响，随Dy3＋浓度增加，发光强度先增大后减小，最佳掺杂浓度为0．04mol，Y／B值在较小范围内先增大后减小。根据Dexter理论分析其浓度猝灭机理为电偶极一电偶极相互作用。测量并标定了Dy抖不同浓度下样品的色坐标均呈现白光发射。研究表明，KNaCa2（PO4）2：Dy3＋材料是一种适合紫外-近紫外-蓝光激发的单一基质白光荧光粉。
Phosphor KNaCa2（PO4）2：Dy3＋ was synthesized by high temperature solid-state reaction and its lumi- nescence properties were investigated. The excitation and emission spectra of KNaCa2（PO4）2：Dy3＋ phosphor were measured by fluorospectrophotometer at room temperature. The excitation bands were all extended from 300 to 500nm, of which the strongest peak was located at 385nm. Phosphor can be excited effectively by InGaN chips in the range of 380-410nm and two major emission peaks locate at 485 and 620nm, which correspond to the 4 F9/2-6 H15/2 and 4 F9/2 6 H13/2 typical transition of Dy3＋ , respectively. White light could be obtained by mixing the two emission colors, blue （485nm） and yellow （577nm）, in the single host. The luminescent intensity of KNa- Ca2-x（PO4）2： xDy3＋ powder changed along with different concentrations of Dy3＋ ions, and the optimum con- centration of Dy3＋ in KNaCa2 （PO4）2 was x（Dy） ：0.04tool. It was confirmed that the mechanism of concentra- tion is electric dipole-dipole interaction. Color coordinates were measured and marked under different Dy3＋ con- centrations, and all of the samples show the white light emission. The experimental results show that the KNaCa2（PO4）2：Dy3＋ was a single host phosphor with superior properties for white light emitting diodes.
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