试验优化设计Er3+/Yb3+共掺Ba5Gd8Zn4O21荧光粉及红光上转换发光性质研究  

Experimental optimal design of Er3+/Yb3+ co-doped Ba5Gd8Zn4O21 phosphor and red upconversion luminescence properties

作　　者：赵越 杨帆 孙佳石 李香萍 张金苏 张希珍 徐赛 程丽红 陈宝玖 Zhao Yue;Yang Fan;Sun Jia-Shi;Li Xiang-Ping;Zhang Jin-Su;Zhang Xi-Zhen;Xu Sai;Cheng Li-Hong;Chen Bao-Jiu(College of Science,Dalian Maritime University,Dalian 116026,China)

机构地区：[1]大连海事大学理学院

出　　处：《物理学报》2019年第21期46-54,共9页Acta Physica Sinica

基　　金：国家自然科学基金(批准号:11774042,11704056);大连市高层次人才创新支持计划(批准号:2016RQ037,2017RQ070);集成光电子学国家重点实验室开放课题(批准号:IOSKL2019KF06,OSKL2018KF02);中央高校基本科研业务费专项基金(批准号:3132019186,3132019338,3132019035);大连海事大学研究生教育教学改革项目(批准号:YJG2019209,YJG2019210)资助的课题~~

摘　　要：为得到最大发光强度的红光上转换Er^3+/Yb^3+共掺Ba5Gd8Zn4O21荧光粉,采用均匀设计初步寻找Er^3+/Yb^3+共掺杂的浓度范围,再通过二次通用旋转组合设计,建立了Er^3+/Yb^3+掺杂浓度与荧光粉在980 nm与1550 nm激光激发下红色上转换发光强度的回归方程,最后利用遗传算法解得回归方程的最优解,即在980 nm与1550 nm激光激发下红光上转换最大发光强度对应的Er^3+/Yb^3+掺杂浓度,用高温固相法分别制备出两种激发下的最优解荧光粉样品.经X射线衍射仪分析,证明所制备样品均为纯相Ba5Gd8Zn4O21.在980 nm激光激发下,最优样品的红光为双光子过程;在1550 nm激光激发下,最优样品的红光为三光子过程.测量了最优样品关于温度的上转换发射光谱,发现样品的红光上转换发光强度随着温度的升高而减弱.所得最优样品与NaYF4∶Er^3+/Yb^3+红光商品粉进行比较,在980 nm和1550 nm激光激发下,最优样品红光上转换发光强度远强于NaYF4红光商品粉发光强度.在相同功率密度激发下, 980 nm激光激发下的最优样品比1550 nm激光激发下的最优样品红光上转换发光强度更强.In order to obtain the Er3+/Yb3+co-doped Ba5Gd8Zn4O21 up-conversion phosphor material with maximumred luminous intensity,three steps are adopted as follows.Firstly,the uniform design in the experimentaloptimal design is used to find the reasonable doping concentration of Er^3+/Yb^3+.Secondly,according to thequadratic general rotary unitized design,the regression equation of the red luminescence intensity of Er^3+/Yb^3+co-doped Ba5Gd8Zn4O21 under 980 nm and 1550 nm excitations is established.Finally,the optimal solution ofthe regression equation is obtained by genetic algorithm.The Ba5Gd8Zn4O21:Er^3+/Yb3+phosphors are preparedby a high-temperature solid-phase method.The crystal structure for each of the prepared phosphors is analyzedby X-ray diffraction,and it is confirmed that the prepared phosphor samples of Ba5Gd8Zn4O21 are all in purephase.Using the 980 nm laser as an excitation source,the relationship between the red up-conversionluminescence intensity of the optimal sample and the operating current of the laser is studied.It is found thatthe red luminescence is emitted through a double-photon process by the formula fitting analysis.Using the 1550 nmlaser as the excitation source,it is found that red luminescence is emitted through a three-photon process.Theup-conversion emission spectrum of the optimal sample with respect to temperature is measured and discussed,and it is found that the red up-conversion luminescence intensity of the sample is weakened as the temperatureincreases.The optimal samples are compared with the commercial phosphors of NaYF4:Er^3+/Yb^3+under the980 nm and 1550 nm excitation respectively,the luminescence intensity of the optimal sample is much strongerthan that of the commercial phosphor of NaYF4:Er^3+/Yb^3+.Moreover,under the same power density excitation,the red up conversion luminescence intensity of the optimal sample at 980 nm is stronger than that at 1550 nm.

关 键 词：均匀试验设计 二次通用旋转组合设计 红光上转换 Ba5Gd8Zn4O21∶Er^3+/Yb^3+ 

分 类 号：TQ422[化学工程] O482.31[理学—固体物理]