荧光体Zn_4B_6O_(13)及Zn_4B_6O_(13):Mn^(2+)的长余辉发光性质  

Long Lasting Phosphorescence Properties of Zn_4B_6O_(13) and Zn_4B_6O_(13): Mn^(2+)

作　　者：万国江 刘宗淼 陈伟 王静[2] 

机构地区：[1]广东省稀土发光材料工程技术研究开发中心∥江门市科恒实业股份有限公司,广东江门529040 [2]中山大学化学与化学工程学院,广东广州510275

出　　处：《中山大学学报（自然科学版）》2013年第4期105-109,共5页Acta Scientiarum Naturalium Universitatis Sunyatseni

基　　金：广东省重大科技专项资助项目(2012A080106005)

摘　　要：该文采用高温固相法合成了新型蓝紫色Zn4B6O13和黄绿色Zn4B6O13:Mn2+长余辉材料。通过XRD、荧光发射和激发光谱、余辉发射光谱与衰减曲线、色坐标和热释光谱测试手段对Zn4B6O13和Zn4B6O13:Mn2+进行了结构与发光性质表征。Zn4B6O13呈现两个荧光发射峰,与余辉发射基本一致,分别位于350 nm和430 nm附近。余辉持续时间约30 min。Zn4B6O13:Mn2+的荧光和余辉发射峰位于540 nm附近。热释光谱测试结果显示,基质至少存在三种缺陷中心,相应的热释发光峰分别位于345 K,405 K和530 K附近。其中,室温附近的两个低温峰相对应的陷阱中心是导致材料产生紫色和蓝色余辉发光的主要原因。Zn4B6O13:Mn2+样品的热释主峰位于350 K附近,它是导致黄绿色余辉产生的主要原因。Novel bluish-violet Zn4B6013 and yellow-green Zn4B6013： Mn2~ long lasting persistence ma- terials were synthesized by the solid state method. X-ray diffraction （XRD） , photoluminescence and ex- citation spectroscopy, persistent luminescence spectroscopy and decay analysis and thermoluminescence were employed to characterize the structure and optical properties of these materials. Zn4B6Ol3 showed two fluorescent emission peaks located at about 350 nm and 430 nm, which were similar to the persistent luminescence. Zn4B6013 samples maintained the persistent luminescence of about 30 min. The fluores- cence and persistent emission peak of ZnaB6Ol3 ： Mn2~ located at about 540 nm. Moreover, thermolumi- nescence measurement revealed that ZnaB6013 host had at least three defect centres, corresponding ther- moluminescence peaks at about 345, 405 and 530 K, respectively. Two defect centres （at 345 and 405 K） were responsible for producing blue-violet persistent luminescence of Zn4B6013materials. The thermo- luminescence peak of Zn4B6Ol3 ： Mn2＋ sample located at 350 K, resulting in yellow-green persistent lu- minescence of ZnnB6O13 ： Mn2＋ materials.

关 键 词：长余辉 硼酸盐 缺陷发光 荧光光谱 热释发光 

分 类 号：O611.4[理学—无机化学] O433.5[理学—化学]