YZr2OZr3:Er3+纳米晶anti-Stokes发光性质的研究

采用均相沉积法制备了不同Er³⁺离子浓度掺杂的Y₂O₃纳米晶, 应用XRD，SEM和PL光谱对该体系材料进行了表征.在Y₂O₃:Er³⁺纳米材料体系中, 观察和研究了Stokes及anti-Stokes PL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-Stokes PL强度最强.粉末X关键词：氧化钇纳米晶anti-Stokes PL双光子吸收

The study of anti-Stokes photoluminescence properties in the Y2O3: Er3+ nanocrystals

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.