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A promising red-emitting phosphor for white light emitting diodes prepared by sol-gel method

机译：通过溶胶-凝胶法制备的用于白光发光二极管的有前途的红光荧光粉

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摘要

Gd_(2-x)EU_x(MoO_4)_3 red phosphors were prepared by the sol-gel (SG) process. Differential thermal analysis (DTA), thermogravimetric (TG) analysis, X-ray diffraction (XRD), field emission scanning electron microscopy (FE-SEM) and photoluminescence (PL) spectra were used to characterize the resulting phosphors. The influence of the synthesis method on the luminescence properties was studied by comparing the optical performances of samples by sol-gel processing and solid-state reaction (SR). On the basis of X-ray powder diffraction, SEM micrograph and photoluminescence measurements, SG appeared to be the most efficient method to prepare high-quality compounds for practical applications. In addition, the effects of annealing temperature, time and Eu~(3+) doping concentration on the PL intensities were also investigated in detail.
机译：通过溶胶-凝胶（SG）工艺制备了Gd_（2-x）EU_x（MoO_4）_3红色荧光粉。差热分析（​​DTA），热重分析（TG），X射线衍射（XRD），场发射扫描电子显微镜（FE-SEM）和光致发光（PL）光谱用于表征所得的荧光粉。通过比较样品的溶胶-凝胶法和固态反应（SR）的光学性能，研究了合成方法对发光性能的影响。在X射线粉末衍射，SEM显微照片和光致发光测量的基础上，SG似乎是制备用于实际应用的高质量化合物的最有效方法。另外，还详细研究了退火温度，时间和Eu〜（3+）掺杂浓度对PL强度的影响。

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