采用超声波悬浮液法，合成了组成为Ba1-xSi2O2N2xEu2+(0.01≤x≤0.08)的蓝色荧光粉，用X射线衍射仪、荧光光谱仪分别对其结构及发光性能进行了表征。结果表明，这种荧光粉的主晶相是BaSi2O2N2Eu2+，在287～460 nm的宽波段范围内可以得到有效激发，发射出很强的蓝光。发射光谱显示出峰值在λ=487 nm的单峰宽带特征，这对应着Eu2+的4f65d→4f7跃迁， Eu2+在303 nm的波长激发下，由于无辐射弛豫现象，比在397 nm的波长激发下，有更大的斯托克斯位移。随着Eu2+浓度增加，发光强度也增加，发射峰红移，当x超过0.02时，出现浓度猝灭现象，发射强度逐渐减弱。在白光LED用荧光粉方面，这种新型蓝色荧光粉有广阔的应用前景。

Blue-emitting Ba1-xSi2O2N2xEu2+(0.01≤x≤0.08) phosphor has been synthesized via an ultrasonic suspension route. The microstructure and photoluminescence properties of the as-synthesized phosphor are characterized by X-ray diffraction (XRD) and photoluminescence spectroscopy, respectively. Its XRD pattern indicates that the BaSi2O2N2Eu2+is the major crystalline phase for all compositions. It can be efficiently excited over a broad excitation band extending from 287 to 460 nm。The BaSi2O2N2Eu2+phosphor has strong blue emission. The emission spectrum consists of a single-peak broadband with a maximum at 487 nm, which may be ascribed to the 4f65d→4f7transition of Eu2+. A larger Stokes shift of Eu2+luminescence is expected at the excitation wavelength of 303 nm than at 397 nm due to nonradiative relaxation. The luminescence intensity is enhanced and a red shift is observed upon increasing Eu2+concentration. When x exceeds 0.02, the emission intensity tends to monotonically decrease due to the Eu2+concentration quenching. This new phosphor has promising applications in phosphor-converted white LED.