近紫外LED用绿色荧光粉Ba0.11Sr2.89-2x-2yCexTbyNax＋yAlO4F发光特性及Ce^3＋→Tb^3＋之间能量传递  

Luminescent Properties and Ce^(3+)→Tb^(3+) Energy Transfer of Green Phosphors Ba_(0.11)Sr_(2.89-2x- 2y)Ce_xTb_yNa_(x + y)AlO_4F for Near Ultra-Violet LED

作　　者：黄奇书[1] 倪海勇[2] 王灵利[2] 张秋红[2] 许毅钦[3,4] 

机构地区：[1]广州有色金属研究院稀有金属科技公司,广东广州510650 [2]广州有色金属研究院稀有金属研究所,广东广州510650 [3]广州有色金属研究院 [4]广东半导体照明产业技术研究院,广东广州510650

出　　处：《中国稀土学报》2014年第4期397-402,共6页Journal of the Chinese Society of Rare Earths

基　　金：广州市科技计划项目(2011J2200034,2013Y2-00118);广州有色金属研究院创新基金(2013C002);广东省战略新兴产业项目(粤财工[2010]633号)资助

摘　　要：高温固相法合成Ba0.11Sr2.89-2x-2yCexTbyNax+yAlO4F荧光粉,并用X射线衍射(XRD)、荧光光谱(PL)测定分析了其晶体结构及光谱性质。结果表明:当Tb3+掺杂量x=0.07时,发光强度最高,发射主峰位于545 nm,并进一步研究了Ce3+,Tb3+共掺的样品中Ce3+→Tb3+能量传递过程。其次,测试由近紫外LED(~380 nm)和三基色荧光粉(Ba0.11Sr2.89Ce0.01Tb0.07Na0.08AlO4F,BAM and Sr2Si5N8:Eu2+)封装的白光LED光电性能,其色品坐标(x=0.3223,y=0.3408),色温5500 K,显色指数为86.26。因此,Ba0.11Sr2.89-2x-2yCexTbyNax+yAlO4F可作为一种潜在的适用于近紫外LED激发的荧光材料。The strontium oxyfluoride aluminate phosphors Ba0. 11Sr2. 89- 2x- 2yCexTbyNax ＋ yAlO4 F were prepared by a high-temperature solid-state reaction technology. The crystal structure and luminescent properties were systematically investigated by means of X-ray diffraction（ XRD） and photoluminescence spectra（ PL）. The energy transfer of synthesized phosphors Ba0. 11Sr2. 89- 2x- 2yCexTbyNax ＋ yAlO4 F between Ce3 ＋and Tb^3＋was investigated and the maximum relative intensity of Tb^3＋reaches at x = 0. 07 with the emission centered at about 545 nm. Secondly,the chromaticity coordinates,color rendering index（ CRI） and correlated color temperature of the white LED fabricated with the tri-color phosphors（ Ba0. 11Sr2. 73Ce0. 01Tb0. 07Na0. 08AlO4 F,BAM and Sr2Si5N8： Eu^2＋） and near ultra-violet LED（ - 380 nm） under（ 100 mA） is（ x = 0. 3223,y = 0. 3408）,5500 K and 86. 26,respectively. The Ba0. 11Sr2. 89- 2x- 2yCexTbyNax ＋ yAlO4 F phosphors are expected to be potential photoluminescent material for near-UV LEDs.

关 键 词：BA0 11Sr2 89AlO4F 能量传递 紫外LED TB3+ Ce3+ 

分 类 号：O482.31[理学—固体物理]