Effects of phonon confinement on the luminescence dynamics of Eu3+ in Gd2O3 nanotubes

被引：85

作者：

Liu, Liqin

Ma, En

Li, Renfu

Liu, Guokui

Chen, Xueyuan ^{[1
]}

机构：

[1] Chinese Acad Sci, Fujian Inst Res Struct Matter, State Key Lab Struct Chem, Natl Engn Res Ctr Optoelect Crystalline Mat, Fujian 350002, Peoples R China

[2] Chinese Acad Sci, Grad Sch, Beijing 10049, Peoples R China

[3] Argonne Natl Lab, Div Chem, Argonne, IL 60439 USA

来源：

NANOTECHNOLOGY | 2007年 / 18卷 / 01期

关键词：

D O I：

10.1088/0957-4484/18/1/015403

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

The effects of phonon confinement on the excited state dynamics of Eu3+ in Gd2O3 nanotubes are investigated. Anomalous thermalization appears due to elimination of low-energy phonon modes in this highly efficient nanophosphor of many potential applications. It is observed that in the low-temperature excitation spectrum hot bands with fine structures originate from the lowest sublevel of F-7(1) at 217 cm(-1) above the ground state. The intensity of the hot bands hardly changes below 50 K, but it increases and exhibits normal Boltzmann thermalization above 50 K. The fluorescence lifetime of D-5(0) (2.19 ms at 10 K) is found to be unusually longer than that of the bulk counterparts, indicating a small filling factor of 0.55 for the nanotubes. These luminescent properties are attributed to the morphology and to the lack of low-energy phonon modes in the nanotubes.

引用

页数：5

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