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Applied Physics 2025
烧结温度对NaYF4:Yb,Er晶体结构和发光的影响研究
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Abstract:
为了探究烧结温度对NaYF4:Yb,Er晶体结构和发光的影响，采用水热法一步合成了六方相NaYF4:Yb,Er，通过烧结稳定过程去除杂质。利用X射线粉末衍射(XRD)、荧光光谱等手段对不同烧结温度下的产物进行物相及光学性能分析。结果表明，烧结温度在500℃时NaYF4:Yb,Er开始向立方相转变，当烧结温度达到700℃时NaYF4:Yb,Er完全变成立方相。并且其荧光性能也随温度的升高而发生变化，随着温度升高绿光(2H11/2→4I15/2和4S3/2→4I15/2跃迁)的荧光强度越低，红光(4F9/2→4I15/2跃迁)的荧光强度越高。
In order to investigate the influence of sintering temperature on the crystal structure and luminescence of NaYF4:Yb,Er, hexagonal NaYF4:Yb,Er was synthesized by a one-step hydrothermal method, and the impurities were removed by sintering and stabilizing. The phase and optical properties of the products under different sing temperatures were analyzed by X-ray powder diffraction (XRD), fluorescence spectrum and other means. The results show that NaYF4:Yb,Er to transform into cubic phase at 500？C, and NaYF4:Yb,Er completely transforms into cubic phase when the sintering temperature reaches 700？C. Moreover, its fluorescence performance also changes with the increase of temperature. With the increase of temperature, the fluorescence intensity of green light (2H11/2→4I15/2和4S3/2→4I15/2 transition) is lower and lower, and the intensity of red light (4F9/2→4I15/2 transition) is higher and higher.
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