【摘要】 通过燃烧法合成了Eu3+掺杂的含氧磷酸镧(La3PO7∶Eu3+)纳米晶颗粒材料。样品的结构、形貌和粒径分别由X射线衍射、扫描电镜和透射电子显微镜得到。测量了样品的发射光谱、激光选择激发光谱和时间分辨光谱。实验结果表明:样品展示的较强红光发射来自于Eu3+的5D0→7F2辐射跃迁,Eu3+在La3PO7基质中至少占据两种不同的格位,且具有较低的格位对称性。更多还原

【Abstract】 La3PO7∶Eu3+ nanocrystals were successfully prepared by combustion method.The structure and morphology of the prepared samples were obtained by X-ray diffraction,scanning of electron microscopy,high resolution transmission electron microscope,respectively.It was found that the average size of the particles was about 80 nm.In La3PO7∶Eu3+ samples,the major emission peak is derived from the 5D0→7F2 radiation transition and has a strong red emission and better color purity.The results of emission spectra,laser selective excitation spectra and time-resolved spectra indicate that symmetry of the local environment of Eu3+ is lower and Eu3+ ions occupy at least two types of site in the La3PO7 nanocrystal.更多还原