M_2Al_2SiO_7:Eu^(2+)(M=Ca,Sr)荧光粉的合成和发光性质的研究  

The synthesis and luminescent properties of M_2 Al_2 SiO_7 : Eu^(2+) ( M=Ca , Sr ) phosphors

作　　者：张秋红[1] 倪海勇[1] 王灵利[1] 黄莉丽[1] 

机构地区：[1]广东省工业技术研究院(广州有色金属研究院)稀有金属研究所,广东广州510650

出　　处：《材料研究与应用》2013年第2期91-96,共6页Materials Research and Application

基　　金：广州市科技计划项目(2011J4300012);广州市珠江科技新星项目(2011J2200034)

摘　　要：采用传统的高温固相法合成了一系列M2Al2SiO7︰Eu2+(M=Ca,Sr)荧光粉,并系统地研究了其结构、漫反射光谱、激发光谱、发射光谱及浓度猝灭和温度猝灭特性.研究结果表明,M2Al2SiO7︰Eu2+(M=Ca,Sr)的激发光谱均在250～300nm和350～450nm范围内具有两个宽的吸收带,与近紫外LED芯片发出的紫外光相匹配.Ca2Al2SiO7︰Eu2+和Sr2Al2SiO7︰Eu2+荧光粉的发射峰分别为位于约536nm黄绿光和487nm处的蓝绿光,它们的发射峰归属于Eu2+的5d-4f跃迁发射.Eu2+在M2Al2SiO7(M=Ca,Sr)中的最佳掺杂浓度均为x=0.005.Ca2Al2SiO7︰Eu2+和Sr2Al2SiO7︰Eu2+荧光粉在375K时的发光强度分别为室温时的69%和68%.A serials of M2 Al2 SiO7 ： Eu2＋ （M= Ca, Sr） phosphors were synthesized by conventional solid state reaction technology and systemically investigated including its structure, diffuse reflection spectra,photo- luminescent excitation and emission spectra, concentration quenching process and thermal quenching process. The results show that two broad bands in wavelength range of 250-300 nm and 350-450 nm were observed in excitation spectra of all the Mz Alz SiO7 ： Eu2＋ （M = Ca, Sr） phosphors, which perfectly matcheed the emission wavelength of near UV light emitting diodes （LEDs）. The emission spectra of both Eu2＋ in CazAl2SiOTand Sr2Al2SiO7 host show yellowish green peak at 536 nm and bluish green emission peak at 487 nm,respectively. The broad emission band in emission M2Al2SiO7 ：Eu2＋ （M=Ca,Sr）phosphors is at- tributed to the 5d-4f transition of the Eu2＋ ion. The optimal concentration of Eu2＋ ion in M2Al2SiO7 （M= Ca,Sr） is x=0. 005. The emission intensity of both Ca2 Al2 SiO7 ：Eu2＋ and Sr2 Al2 SiO7 ：Eu2＋ phosphors at 375K were 69% and 68% at room temperature.

关 键 词：Eu2+ Ca2Al2SiO7 Sr2Al2SiO7 荧光粉 发光性质 

分 类 号：O482.31[理学—固体物理]