合成条件对(Eu0.045Li3xLuy)2O3纳米晶发光性能的影响

用沉淀法制备(Eu_0.045Li_3xLu_y)₂O₃纳米晶，通过测量样品的X 射线衍射谱、傅里叶红外光谱、扫描电子显微镜图像和透射电子显微镜图像分析其微观结构与形貌，测量样品的激发谱、发射谱及发光衰减曲线来分析发光特性。研究合成条件中沉淀剂、助熔剂、温度、退火条件等因素对(Eu_0.045Li_3xLu_y)₂O₃ 纳米晶微结构、发光特性、荧光衰减及能级寿命的影响。实验表明，氨水沉淀下，合成前驱粉中加入碳酸锂，1000 ℃活性炭中退火获得的(Eu_0.045Li_3x=0.015Lu_y=0.94)₂O₃纳米晶，比相同条件不加碳酸锂的样品发光强度提高约2倍；比800 ℃空气中退火的(Eu_0.045Lu_0.955)₂O₃纳米晶发光强度提高约4倍。

Abstract

(Eu_0.045Li_3xLu_y)₂O₃ nanocrystals are prepared by the precipitation method. The X-ray diffraction, Fourier transform infrared spectra, scanning electron microscopic images and transmission electron microscopic images are used to analyze the microstructure and morphology of the nanocrystals. To analyze the luminescence properties, the excitation spectra, emission spectra and luminescence decay curves of the samples are measured. The influence of precipitation agent, solvent, temperature, annealing condition and other factors on the microstructure, luminescence properties, fluorescence decay and energy level lifetime for (Eu_0.045Li_3xLu_y)₂O₃ nanocrystals is researched. The results show that the luminous intensity of the (Eu_0.045Li_3x=0.015Lu_y=0.94)₂O₃ nanocrystals precipitated in ammonia by adding lithium carbonate into the precursor powder and after calcination in activated carbon at 1000 ℃ increases by about twice compared with the sample which is prepared without lithium carbonate added, and increases by about four times compared with the sample calcined in air at 800 ℃.

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王林香. 合成条件对(Eu_0.045Li_3xLu_y)₂O₃纳米晶发光性能的影响[J]. 光学学报, 2016, 36(3): 0316001. Wang Linxiang. Effect of Synthesis Conditions on Luminescence Properties of (Eu_0.045Li_3xLu_y)₂O₃ Nanocrystals by Precipitation[J]. Acta Optica Sinica, 2016, 36(3): 0316001.

合成条件对(Eu_0.045Li_3xLu_y)₂O₃纳米晶发光性能的影响

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