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Er-Y共掺杂ZrO2的Raman光谱和Er3+的荧光光谱
何军,罗孟飞*,金凌云,何迈,方萍,谢云龙
作者单位
何军 浙江师范大学物理化学研究所浙江省固体表面反应化学重点实验室金华321004 
罗孟飞* 浙江师范大学物理化学研究所浙江省固体表面反应化学重点实验室金华321004 
金凌云 浙江师范大学物理化学研究所浙江省固体表面反应化学重点实验室金华321004 
何迈 浙江师范大学物理化学研究所浙江省固体表面反应化学重点实验室金华321004 
方萍 浙江师范大学物理化学研究所浙江省固体表面反应化学重点实验室金华321004 
谢云龙 浙江师范大学物理化学研究所浙江省固体表面反应化学重点实验室金华321004 
摘要:
采用柠檬酸溶胶凝胶法制备Er-Y共掺杂的具有单斜、四方和立方结构的ZrO2基复合氧化物.用XRD和Raman对复合氧化物结构和不同晶相环境中Er3+的荧光光谱进行了表征.结果表明,掺杂Er3+在三种不同晶相Y-ZrO2中表现出不同的荧光特征.随着基体ZrO2由单斜相逐渐向四方和立方相转变,其荧光谱峰位置对称性提高,峰分裂数减少,谱带逐步向单峰转变.在632.8 nm激发下的Raman图谱有Er3+的荧光干扰,在514.5 nm下则以荧光光谱为主体,不能获得Raman信号,在325 nm激发下无荧光干扰.XRD和紫外Raman二种方法对物相表征结果的差别是由于样品体相和表面不一致,表层容易生成比内层结构对称性更低的物相造成的.
关键词:  ZrO2,Er3+,Raman,XRD,荧光光谱
DOI:10.1360/cjcp2007.20(1).90.5
分类号:
基金项目:
Raman Spectrum of Er-Y-codoped ZrO2 and Fluorescence Properties of Er3+
Jun He ,Meng-fei Luo* ,Ling-yun Jin ,Mai He ,Ping Fang ,Yun-long Xie
Abstract:
Er-Y-codoped ZrO2 mixed oxides with monoclinic, tetragonal and cubic structures were prepared by a sol-gel method. The crystal structure of ZrO2 matrix and the effect of the ZrO2 phases on the fluorescence properties of Er3+ were studied using Raman spectroscopy. The results indicated that the fluorescence properties of Er3+ depend on its local ZrO2 crystal structures. As ZrO2 matrix transferred from monoclinic to tetragonal and cubic phase, the Raman and fluorescence bands of Er3+ decreased in intensities and tended to form a single peak. With 632.8 nm excitation, the bands between 640 and 680 nm were attributed to the fluorescence of Er3+ in the ZrO2 environment. However, only the fluorescence was observed and no Raman spectra were seen under 514.5 nm excitation, while only Raman spectra were observed under 325 nm excitation. UV Raman spectroscopy was found to be more sensitive in the surface region while the information provided by XRD mainly came from the bulk. The phase with lower symmetry forms more easily on the surface than in the bulk.
Key words:  ZrO2, Er3+, Raman spectrum, XRD, Fluorescence properties