静电纺丝方法制备CaTiO_3∶Er^(3+)微米带及其上转换发光性质(英文)

Electrospinning Fabrication and Upconversion Luminescent Properties of CaTiO_3∶Er^(3+) Microbelts

CaTiO3∶Er3+微米带由静电纺丝方法制备。用X射线衍射、傅里叶变换红外光谱、拉曼光谱、扫描电子显微镜(SEM)、透射电子显微镜(TEM)、高分辨透射电子显微镜(HRTEM)和上转换发光表征所制备的样品。SEM和TEM测试证实所得前躯体微米带尺寸均一,烧后得到的微米带是由纳米粒子组成的。在980 nm激光激发下,CaTiO3∶Er3+样品发出绿光,绿光发射峰位于546 nm,可归属于Er3+离子的4S3/2→4I15/2跃迁。当Er3+离子的掺杂浓度提高,因为Er3+离子之间的能量传递,红光发射相对于绿光发射增强。

One-dimensional CaTiO3∶ Er^3＋ microbelts have been prepared by electrospinning method.X-ray diffraction,Fourier transform infrared spectroscopy,Raman spectroscopy,scanning electron microscopy（SEM）,transmission electron microscopy（TEM）,high-resolution transmission electron microscopy（HRTEM）,up-converted luminescence were used to characterize the resulting samples.SEM and TEM analysis indicate that the obtained precursor belts have a uniform size,and the as-formed microbelts consist of nanoparticles.Under 980 nm laser beam excitation,the CaTiO3∶ Er^3＋ samples exhibit a green emission band with a maximum at 546 nm originating from the ^4S3/2→^4I15/2 transitions of Er^3＋ ions.When the Er^3＋ concentration increases,the red emission of CaTiO3∶ Er^3＋ increases relative to the green emission,which is due to the energy transfer between Er^3＋ ions.