通过高温固相法成功合成了一种新型蓝光荧光粉BaKBP2O8∶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%。BaKBP2O8∶Eu2+的色坐标为(0.176 6,0.168 1)。

Novel efficient blue phosphors Ba1-xKBP2O8∶xEu2+ were successfully synthesized by high-temperature solid state reaction. The structure and luminescence properties were characterized systematically by XRD and fluorescence 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. Under violet light excitation,the samples emit blue light. When the mole fraction of Eu2+ is 0.03,the emission spectrum 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 phosphors is still more than 50%. The CIE chromaticity coordinate of BaKBP2O8∶Eu2+ is (0.176 6,0.168 1).