Synthesis and optical properties of nanosized powders:: lanthanide-doped Y2O3

被引：108

作者：

Tessari, G

Bettinelli, M

Speghini, A

Ajò, D

Pozza, G

Depero, LE

Allieri, B

Sangaletti, L

机构：

[1] Univ Verona, Dipartimento Sci & Tecnol, I-37134 Verona, Italy

[2] CNR, ICTIMA, I-35127 Padua, Italy

[3] Univ Brescia, Ist Nazl Fis Mat, I-25123 Brescia, Italy

[4] Univ Brescia, Dipartimento Chim & Fis Ingn & Mat, I-25123 Brescia, Italy

来源：

APPLIED SURFACE SCIENCE | 1999年 / 144-45卷

关键词：

nanosized powders; lanthanide-doped Y2O3; optical properties;

D O I：

10.1016/S0169-4332(98)00902-7

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Y1.8Nd0.2O3 and Y1.8Er0.2O3 powder samples were prepared by combustion synthesis. X-ray diffraction showed that the materials are nanostructured, with average coherence length 5-10 nm. The visible and infrared luminescence spectra of nanometric cubic Y1.8Nd0.2O3 and Y1.8Er0.2O3 show some important differences from these of the bulk materials. in the case of Y1.8Er0.2O3, faster relaxation of some excited states occurs, leading to changes in the relative intensities of several optical transitions. As far as nanostructured Y1.8Nd0.2O3 is concerned, the F-4(3/2) --> I-4(9/2) transition is characterized by a perturbed intensity pattern of the Stark components and by an anomalous integrated intensity. Possible explanations for this behaviour are proposed. (C) 1999 Elsevier Science B.V. All rights reserved.

引用

页码：686 / 689

页数：4

共 7 条

[1] Size dependent efficiency in Tb doped Y2O3 nanocrystalline phosphor [J].