摘要
以稀土羧酸配合物为前驱体, 采用快速热分解方法制备了纳米Y2O3∶Eu 荧光材料,进行了结构、尺寸及形貌表征. 随着Eu3+ 掺杂浓度的提高, 样品的晶胞参数加大, 当Eu3+掺杂量高达30% 时, 体系仍能保持Y2O3 基质的立方相结构; 样品的晶粒度与退火温度及配合物前驱体组成有关. 退火温度越高、前驱体中Re3+ 与配体的摩尔比越小, 样品的粒径越大. 随着Eu3+ 掺杂浓度的提高, 激发光谱红移, 发射强度在掺杂浓度分别为5% 和10% 时有极大值; 发射强度与Re3+ 和配体摩尔比及退火温度有关.
Nanoscale Y 2O 3∶Eu phosphors were prepared by thermal decomposition of the rare earth carboxylic acid complexes. The structure, size and morphology of particles were characterized by XRD and HRTEM. The cell parameters of nanoscale Y 2O 3∶Eu are related with the doping concentration of Eu 3+ , annealing temperature and the ratio of rare earth ions(Re 3+ )and carboxylic acid. The size of Y 2O 3∶Eu nanoparticle can be controlled by modifying the ratio of Re 3+ and ligand in the precursor. The excitation spectra shift towards the red when the content of Eu 3+ is increased. The emission intensity is related with the composition of the complexes, the annealing temperature and the concentration of Eu 3+ .
出处
《发光学报》
EI
CAS
CSCD
北大核心
1999年第3期254-257,共4页
Chinese Journal of Luminescence
基金
国家自然科学基金
国家科技部攀登计划
国家教育部博士点基金
北大方正基金
中国博士后基金
关键词
稀土配合物
前驱体
纳米材料
氧化钇
荧光粉
rare earth carboxylic acid complexe
precursor
Y_2O_3∶Eu
nanoscale materials