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为了获得BaY_2ZnO_5:Tm~(3+)/Yb~(3+)荧光粉材料的最大蓝色上转换发光强度,采用正交试验设计与二次通用旋转组合设计相结合的两步连续优化法对Tm~(3+)和Yb~(3+)掺杂浓度进行全局优化,得到该体系最强蓝光发射下的离子掺杂最佳浓度.采用高温固相反应法合成出蓝色上转换发光强度最强的BaY_2ZnO_5:Tm~(3+)/Yb~(3+)荧光粉材料,并对样品的晶体结构和上转换发光性质进行了研究.980nm红外光激发下,测量了最优样品在不同激发电流下的上转换发射光谱,由强度制约关系确定样品的蓝色上转换发光为三光子过程.测量了最优样品温度相关的上转换发射光谱,发现样品的蓝色上转换发光强度随着样品温度的升高而持续减弱,即发生了温度猝灭现象,计算得激活能约为0.602eV.
In order to obtain the maximum blue upconversion luminescence intensity of BaY_2ZnO_5: Tm ~ (3 +) / Yb ~ (3+) phosphors, a two-step continuous optimization method combining orthogonal experimental design and quadratic universal rotation combined design Tm ~ (3+) and Yb ~ (3 +) doping concentration, the best concentration of ion doping under the strongest blue light emission of the system was obtained.High temperature solid-state reaction method was used to synthesize the blue upconversion luminescence intensity The strongest BaY_2ZnO_5: Tm ~ (3 +) / Yb ~ (3+) phosphor was synthesized and the crystal structure and the upconversion luminescence properties of the sample were studied.With the excitation of 980nm infrared light, The upconversion emission spectrum under the excitation current is determined by the intensity constraint relationship and the blue up-conversion luminescence of the sample is determined to be a three-photon process.The up-conversion emission spectra related to the optimal sample temperature are measured and the blue up-conversion luminescence intensity of the sample is found The sample temperature continued to weaken, that is, the phenomenon of temperature quenching occurred, and the calculated activation energy was about 0.602eV.