摘要
用透射电镜拍摄球形CGd2O3∶Eu纳米晶,并研究了室温下它的激发和发射光谱。结果表明,900℃制备的体材料和相应的纳米晶相比,其激发光谱存在明显差异。前者以基质激发带为主导,电荷转移带(CTB)很弱,而后者以CTB为主。在绝缘体稀土氧化物中。
The transmission electron
microscopic morphology and excitation and emission spectra of cubic Gd2O3Eu nanocrystals
were investigated. The excitation spectrum of the Gd2O3Eu nanocrystal consists of charge
transfer band(CTB) of Eu3+ mainly, and the excitation lines of Gd3+ and Eu3+ are at higher
levels. The cubicGd2O3Eu nanocrystals obtained at 900 are distinct from the bulk in the
excitation spectra. There are negligible grainsize effects on the excitation and emission spectra
which may be presented in the features of wellknown 4f-4f transitions of the corresponding Eu3+
levels.
出处
《中国稀土学报》
CAS
CSCD
北大核心
1999年第2期176-179,共4页
Journal of the Chinese Society of Rare Earths
基金
国家自然科学基金
863高技术资助项目
中国科学院激发态物理开放研究实验室项目