PDF(Pubmed)
Abstract：
Zn2V2O7 phosphor was made using a sol-gel technique and then annealed at temperatures ranging from 700 to 850 °C. The x-ray diffraction (XRD) results revealed that Zn2V2O7 exhibits a single monoclinic phase. The width at half-maximum of the (022) XRD peak shrank overall resulting in improved crystallinity of the Zn2V2O7 phosphors with higher annealing temperatures. Because of the good crystallinity of Zn2V2O7, scanning electron microscopy (SEM) indicates that grain size increases as the annealing temperature rises. When the temperature was raised from 35 °C to 500 °C, TGA findings revealed a total weight loss of approximately 65%. The photoluminescence emission spectra of annealed Zn2V2O7 powders revealed a wide green-yellowish emission in the range of 400 nm-800 nm. As the annealing temperature was raised, the crystallinity improved, resulting in an increase in PL intensity. The peak of the PL emission shifts from green to yellow emission.
摘要：
使用溶胶-凝胶技术制备Zn2V2O7磷光体,然后在700至850°C的温度下退火。X射线衍射（XRD）结果表明，Zn2V2O7表现出单一的单斜相。(022)XRD峰的半峰宽度总体上收缩,导致具有较高退火温度的Zn2V2O7磷光体的结晶度改善。由于Zn2V2O7的良好结晶度,扫描电子显微镜(SEM)表明晶粒尺寸随着退火温度的升高而增大。当温度从35℃升至500℃时，TGA发现显示大约65%的总重量损失。退火的Zn2V2O7粉末的光致发光发射光谱显示出在400nm-800nm范围内的宽绿色黄色发射。随着退火温度的升高,结晶度提高，导致PL强度增加。PL发射的峰值从绿色发射移动到黄色发射。
