水热法制备NaGd(WO_4)_2:Eu~(3+)发光材料

采用水热法,以十六烷基三甲基溴化铵(CTAB)为表面活性剂,合成了NaGd(WO4)2:Eu3+发光材料.采集XRD,SEM图谱来表征样品的晶型与形貌,利用激发光谱和发射光谱研究了材料的发光特性.结果表明,所制得的NaGd(WO4)2:Eu3+是由纳米棒组成的绒球状发光材料,球体直径为100nm,纳米棒长2～5μm.样品不仅可以被紫外光(266nm)激发,还能被近紫外光(393nm)和蓝光(464nm)有效激发,其主发射峰值位于614nm,为红色荧光成分,且当Eu3+掺杂物质的量分数为3%时,此发射峰达到最大,该发光粉可用于制造紫外光芯片激发的白光LED.

Hydrothermal synthesis of phosphor NaGd (WO4)2:Eu3+with spherical particle

NaGd(WO4)2:Eu3+ powders were prepared by a simple hydrothermal method,cetyltrimethylammonium bromide as the surfactant.The morphology and composition of the NaGd(WO4)2:Eu3+ powders were characterised by SEM and XRD.The phosphorescence of the powders was measured with spectrofluorimeter.The result showed that spherical particles were synthesized with average size for 100 nm,and they consisted of nanorods with 2-5 μm long.The powder could not only be excited by UV(266 nm),but also by near-UV(393 nm)and blue(464 nm).There were red fluorescence composition in the emission spectrum at 614 nm,when the Eu3+ doping concentration was 3%,the emission peak at 614 nm was relatively high.The particles may be used for white-LED excitated by ultraviolet chip.