【摘要】 采用均相沉积法制备了不同Er3+ 离子浓度掺杂的Y2 O3纳米晶 ,应用XRD ,SEM和PL光谱对该体系材料进行了表征 .在Y2 O3:Er3+ 纳米材料体系中 ,观察和研究了Stokes及anti StokesPL谱强度与Er3+ 离子摩尔浓度变化的关系 ,当Er3+ 离子浓度为 2 0mol%时 ,anti StokesPL强度最强 .粉末XRD和SEM照片分别表明 :制备的Y2 O3:Er3+ 纳米材料具有立方相结构 ,且粒径分布均匀 .实验结果证明 :anti StokesPL来自于这个体系中的双光子吸收过程更多还原

【Abstract】 The homogeneous precipitation method was used for preparing nanocrystalline erbium doped Y 2O 3 with various molar concentrations. These materials synthesized in the system were characterized with XRD, SEM micrograph and PL spectra. Stokes and anti Stokes PL emissions of Y 2O 3:Er 3+ nanocrystals were investigated, whose intensities were varied evidently with a range of dopant erbium ions concentration. When the molarity of dopant erbium ions is close to 2 0%, the relative intensities of anti Stokes PL spectra are dominant. From the XRD and SEM micrograph, the Y 2O 3:Er 3+ nanocrystal with cubic structure is verified and the distribution of particles size is homogeneous. The experimental results indicate that the anti Stokes emission results from two photon absorption process in the Y 2O 3:Er 3+ nanocrystal system.更多还原