溶液燃烧法制备纳米LaAlO_(3):Dy3+及发光性能研究

Preparation and luminescent properties of LaAlO_(3):Dy^(3+) nanoparticles by solution combustion method

通过溶液燃烧法以LaAlO_(3)·6H_(2)O,Dy(NO_(3))_(3)·9H_(2)O和Al(NO_(3))_(3)·9H_(2)O及C_(2)H_(5)NO_(2)为原材料制备纳米粉体La1-xDyxAlO_(3)(x=0,0.01,0.02,0.03,0.04,0.05)。采用X射线衍射、扫描电子显微镜、紫外-可见漫反射光谱和荧光光谱研究晶体结构、形貌、发光强度等内容,结果表明,通过溶液燃烧法在800℃下煅烧4 h,Dy^(3+)离子进入到LaAlO_(3)晶格中,荧光光谱分析结果表明La1-xDyxAlO_(3)粉体在370 nm的激发波长下,发光主峰位于423 nm处,在掺杂比例为0.03时发光强度最高,其禁带宽度5.54 eV与理论值5.6 eV相近。

The nano-powder La_(1-x)Dy_(x)AlO_(3)(x=0,0.01,0.02,0.03,0.04,0.05)were prepared by solution combustion method with La(NO_(3))_(3)·6H_(2)O,Dy(NO_(3))_(3)9H_(2)O and C_(2)H_(5)NO_(2)as raw materials.XRD,SEM,UV-VIS diffuse reflectance spectroscopy and fluorescence spectroscopy were used to study the crystal system,morphology and luminescence intensity.The results show that Dy;ions enter into the lattice of LaAlO3 after calcined at 800℃for 4 h by solution combustion method,The results of fluorescence spectrum analysis show that the main emission peak of La;Dy;AlO;powder is at 423 nm at the excitation wavelength of 370 nm and the band gap was 5.54 eV close to the theoretical value 5.6 eV.