水热法制备YF_3:Eu^(3+)发光纳米束及其性能研究

Preparation and Properties of YF_3:Eu^(3+) Luminescent Nanobundles by Hydrothermal Method

以PEG为表面活性剂,NaF为氟源,在水热条件下合成出均一的YF3:Eu3+发光纳米束,对其结构进行了表征,并对其形成机制进行了初步探讨。XRD分析表明:样品为结晶良好的正交相YF3。透射电镜照片表明:所得样品为直径200nm,长度约800nm的YF3:Eu3+纳米束,该纳米束由直径30nm,长度70nm的纳米晶自组装而成。SAED显示所得样品为单晶结构。荧光光谱表明:在394nm的紫外光激发下,最强发射峰出现在591nm处,对应于Eu3+的5D0→7F1的磁偶极跃迁,发橙红光。

YF3： Eu^3＋ luminescent nanobundles were prepared by a hydrothermal method using PEG as surfactant and NaF as fluoride resource; the structure was characterized and the forming mechanics was discussed. XRD analysis shows that the samples are orthogonal phase YF3 with good crystallization. TEM images indicate that the samples are homogeneous nanobundles with a diameter of 200 nm and a length of 800 nm, and the nanobundles are self-assemblied by nanocrystals with a diameter of 30 nm and a length of 70 nm. SAED pattern presents that the samples are single crystal. Photoluminescence spectra show that the main emission peak is near 591 nm, corresponding to ^5D0→^7F1 transition of Eu^3＋, which emits orange-red light under the 394 nm UV excitation.