Dy^(3+),Sm^(3+)共掺杂Ca_2A1[AlSiO_7]荧光粉的发光性质研究  

Luminescent Properties of Dy^(3+),Sm^(3+) Co-doped Ca_2A1[AlSiO_7]Phosphors

作　　者：吐沙姑.阿不都吾甫 戴鹏鹏[1] 马媛媛[1] 周芷萱[1] 海热古.吐逊 艾尔肯.斯地克 

机构地区：[1]新疆师范大学新疆矿物发光材料及其微结构实验室,新疆乌鲁木齐830054

出　　处：《发光学报》2017年第2期154-159,共6页Chinese Journal of Luminescence

基　　金：国家自然科学基金(11464045;11264040);新疆师范大学重点实验室招标课题(KWFG1604)资助项目~~

摘　　要：采用高温固相反应法合成了一系列Dy^(3+)、Sm^(3+)单掺杂和共掺杂铝方柱石发光材料,详细地研究了Dy^(3+)、Sm^(3+)掺杂对铝方柱石的结构和发光性质的影响。XRD结果表明Dy^(3+)、Sm^(3+)离子单掺杂和共掺杂样品均形成了单相的铝方柱石结构化合物,并没有改变基质的晶体结构。发光光谱表明,通过调节Dy^(3+)、Sm^(3+)离子的掺杂比例,发光颜色可实现从黄色到黄白色的可控调节。此外,发射和激发光谱表明,Dy^(3+)与Sm^(3+)离子之间存在有效的光谱重叠,暗示着Dy^(3+)→Sm^(3+)的能量传递。荧光寿命衰减结果进一步证实Dy^(3+)与Sm^(3+)离子之间是一种无辐射共振能量传递方式。A series of Dy3＋,Sm3＋co-doped Ca2A1[AlSiO7] phosphors were synthesized by the solid-state reaction. The crystal structure and luminescent properties of the samples were investigated by XRD,PL spectra and lifetime decay. XRD results show that the as-prepared phosphors are single-phase melilite compounds. Dy and Sm codoped do not vary the crystal structure of melilite. The PL spectra results show that the emission color can be tuned from yellow-emitting to warm-white lighting by changing the ratio of Dy3＋to Sm3＋. In addition,the PL and PLE results demonstrate that there is a significant energy transfer from Dy3＋to Sm3＋. The lifetime decay results further verified that the energy-transfer mode of Dy3＋→Sm3＋is attributed to the nonradiative energy-transfer.

关 键 词：高温固相法 Ca2A1[AlSiO7]∶Dy3+ Sm3+ 能量传递 色坐标 

分 类 号：O482.31[理学—固体物理]