采用固相合成法制备了Eu3+掺杂的LaOBr发光材料,研究了不同物质的量分数的Eu3+对发光性质的影响,其中Eu3+的物质的量分数为0.1％,0.2％,0.5％,1％.X线衍射图表明:所得样品为纯相的LaOBr.测量了不同物质的量分数的激发谱、发射谱及荧光寿命.通过对Eu3+衰减曲线的拟合,得到在相同Eu3+的物质的量分数下,从电荷迁移带跃迁到5 D0能级时间比5 D2能级跃迁到5 D0能级时间短,但从5 D0能级跃迁到基态能级的时间基本相同,说明Eu3+之间存在交叉弛豫现象.利用Judd-Oflet理论,从发射光谱获得了Eu3+的光学跃迁强度参数Ωλ(λ=2,4).
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