中文摘要：

通过高温固相法成功合成了一种新型蓝光荧光粉Ba KBP2O8∶Eu2+,分别用XRD和荧光光谱表征了其结构与光学性能。结果表明,Eu2+的引入并没有显著改变其四方相的晶体结构。样品的激发光谱(监测波长为443 nm)是由主晶格吸收的307 nm吸收肩与Eu2+离子4f7-4f65d跃迁的346 nm主峰组成。在紫光激发下,样品的发射光谱为蓝色。当Eu2+离子摩尔分数为0.03时,样品的发射强度达到最大值。然而,随着Eu2+浓度的进一步增加,由于浓度猝灭机制,其发射强度开始降低。在超过370 K的温度下,荧光粉样品的相对发光强度仍然超过50%。Ba KBP2O8∶Eu2+的色坐标为(0.176 6,0.168 1)。

英文摘要：

Novel efficient blue phosphors Ba1-x KBP2 O8:xEu2+ were successfully synthesized by high-temperature solid state reaction. The structure and luminescence properties were characterized systematically by XRD and fluores-cence spectra, respectively. The results show that Eu2+doping does not produce significant changes for the crystal structure which remains pure tetragonal. Excitation spectrum ( monitoring wavelength is 443 nm) is composed of the acromion at 307 nm due to host absorption, and the main peak at 346 nm due to 4f7-4f65d transition Eu2+ ions. Un-der violet light excitation, the samples emit blue light. When the mole fraction of Eu2+ is 0. 03, the emission spec-trum has a maximum intensity. However, with further increase of the concentration of Eu2+, the emission spectrum intensity decreases, as a result of concentration quenching. At temperatures over 370 K, the intensity of the phos-phors is still more than 50%. The CIE chromaticity coordinate of BaKBP2O8:Eu2+ is (0. 176 6, 0. 168 1).