立方Gd_2O_3∶Eu纳米晶及光谱性质

Spectral Properties of Cubic Gd2O3Eu Nanocrystals

用透射电镜拍摄球形ＣＧｄ２Ｏ３∶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.