BaAl_2Si_2O_8:Eu^(3+)荧光粉的制备及发光性能(英文)

Synthesis and Luminescence Properties of BaAl_2Si_2O_8:Eu^(3+) Phosphor

利用高温固相法制备Eu3+掺杂的BaAl2Si2O8荧光粉并研究其发光性能,通过X射线衍射分析该发光材料的结构特征。光致发光谱表明:在近紫外光激发下该荧光粉可以发出较好的红光,峰值位于615 nm处;Eu3+的最佳掺杂量为0.08 mol。分析了BaAl2Si2O8:0.08Eu3+材料的发射强度随电荷补偿剂Li+,Na+和K+掺杂量的变化规律,结果表明:随着电荷补偿剂含量的增大,BaAl2Si2O8:0.08Eu3+的发射强度均出现先增大后减小趋势;K+具有更好的补偿效果。色参数测量结果表明,该荧光粉是一种较好的用于白光发光二极管的红色荧光粉。

Eu3＋ doped BaAl2Si2O8 phosphors were synthesized by a high temperature solid state method,and the luminescent proper-ties were also investigated.The structure characteristics of the luminescent materials were determined by X-ray powder diffractometer.Photoluminescence measurements indicate that the phosphors exhibit a bright red emission centered at 615 nm excited by near ultra-violet.The optimal concentration of the doping Eu3＋ in BaAl2Si2O8：Eu3＋ phosphor was 0.08 mole.The influence of concentration of Li＋,Na＋ and K＋ on the emission spectra of BaAl2Si2O8：0.08Eu3＋ were analyzed.The results show that the emission intensity of BaAl2Si2O8：0.08Eu3＋ firstly increases and then decreases with increasing the concentration of charge compensator,and K＋ has better compensation effect.The color parameters indicate that this phosphor is a superior red phosphor candidate for white light-emitting diodes.