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利用水热法成功合成了不同形貌的稀土掺杂六方NaY0.95Yb0.03Er0.02F4,包括柱状、粒状、片状、管状等.通过XRD,SEM,TEM对合成样品的物相结构及晶粒形态进行了表征,探讨络合剂EDTA用量;表面活性剂CTAB,P123,十二烷基苯磺酸钠;热溶剂水、乙二醇、聚乙二醇对晶体生长方向的影响,并对不同形态样品进行上转换发光性能测试,分析晶粒形态对上转换发光强度与寿命的影响,结果显示晶粒越小发光强度越强,相当粒径的管状样品的发光强度比粒状的强,不同晶粒形态上转换的主要能量传递模式也不相同.研究结果可以指导我们可控合成适应实际应用需求的晶粒形态及优良上转换发光性能的材料.
The rare earth doped hexagonal NaY0.95Yb0.03Er0.02F4 with different morphologies was successfully synthesized by hydrothermal method, including columnar, granular, flake and tube shape.The phase structure and crystal structure of the synthesized samples were characterized by XRD, SEM and TEM The effects of complexing agent EDTA dosage, surfactant CTAB, P123, sodium dodecyl benzene sulfonate, hot solvent water, ethylene glycol and polyethylene glycol on the crystal growth direction were investigated. The results show that the smaller the crystal grain is, the stronger the luminescence intensity is, and the luminescence intensity of the tubular sample with the same size is stronger than that of the grainy crystal with different crystal The main energy transfer modes of grain morphological up-conversion are also different.The research results can guide us to controllable synthesis of grain shape and excellent upconversion luminescence properties to meet practical applications.