NaY(MoO_4)_2∶Er^(3+)纳米晶体荧光粉的发光与光学温度传感特性(英文)  

Luminescence and Optical Temperature Sensing Properties of NaY( MoO_4)_2∶Er^(3+) Nanocrystalline Phosphor

作　　者：孙英斐 吕树臣[1] 孟庆裕[1] 曲秀荣[1] 

机构地区：[1]哈尔滨师范大学光电带隙材料省部共建教育部重点实验室,黑龙江哈尔滨150025

出　　处：《发光学报》2017年第12期1582-1590,共9页Chinese Journal of Luminescence

基　　金：哈尔滨创新科技人才研究专项基金(2014RFXXJ091);光电带隙材料省部共建教育部重点实验室开放项目计划(PEBM201614)资助项目~~

摘　　要：采用熔盐法制备了不同煅烧温度的NaY(MoO_4)_2∶Er^(3+)荧光粉材料,样品的晶体结构与微观形貌由X射线衍射仪和场发射扫描电镜测得。Er^(3+)掺杂的Na Y(MoO_4)_2纳米晶体的斯托克斯荧光发射光谱是在不同煅烧温度下测得的。NaY(MoO_4)_2∶Er^(3+)荧光粉材料的两个能级~2H_(11/2)-~4I_(15/2)和~4S_(3/2)-~4I_(15/2)跃迁的发射强度比随煅烧温度的增加而减小。NaY(MoO_4)_2∶Er^(3+)荧光粉材料的温度传感特性依赖于Er^3的两个热耦合能级~2H_(11/2)-~4I_(15/2)和~4S_(3/2)-~4I_(15/2)的发射强度。研究表明,在一个相对大的传感温度范围(303~573 K),600℃煅烧的样品的温度传感灵敏度比900℃煅烧的样品高,样品的温度传感灵敏度随煅烧温度的增加而减小,600℃煅烧的样品的温度传感灵敏度为1.36×10^(-2)K^(-1),比900℃煅烧的样品高76.6%。最后,解释了基于不同煅烧温度的温度传感灵敏度的物理机制。The NaY（MoO 4）2∶Er^（3＋） phosphors derived at different calcination temperatures were prepared by molten salt method and the crystal structure and microscopic morphology were characterized by means of X-ray diffraction （XRD）and field emission scanning electron microscopy（FE-SEM）.The Stokes fluorescence emission spectra of nanocrystals derived at different calcination temperatures have been measured.It can be found that the emission in-tensity ratio of ~2H_（11/2）-~4I_（15/2） to ~4S_（3/2）-~4I_（15/2） transitions from NaY（MoO_4）_2：Er^（3＋） increases with the decrease of the calcination temperature.Furthermore,the temperature sensing properties of NaY（MoO_4）_2∶Er^（3＋） phosphors were studied based on the emission intensities from two thermally coupled ~2H_（11/2） and ~4S_（3/2）levels of Er^（3＋）.The result show that the temperature sensing sensitivity of the sample calcinated at 600℃is somewhat higher than that of the sample calcinat-ed at 900℃in a relatively wide range of sensing temperature（303-573 K）.The sensing sensitivity increases with the decreasing of the calcination temperature,and a relative high sensitivity of 1.36×10^（-2）K^（-1） is obtained for the sample calcinated at 600℃,which is about 76.6%higher than that of the sample obtained at 900℃.Finally,the physical mechanism for the calcination temperature-dependence of temperature sensing sensitivity was explained and predicted.

关 键 词：熔盐法 NaY(MoO4)2∶Er^3+荧光粉 温度传感 

分 类 号：O482.31[理学—固体物理]