Photoluminescence properties of Co2+-doped ZnO nanocrystals

被引：64

作者：

Lommens, P

Smet, PF

Donega, CD

Meijerink, A

Piraux, L

Michotte, S

Mátéfi-Tempfli, S

Poelman, D

Hens, Z

机构：

[1] Univ Ghent, Phys Chem Lab, B-9000 Ghent, Belgium

[2] Univ Ghent, Dept Solid State Sci, B-9000 Ghent, Belgium

[3] Univ Utrecht, Debye Inst, NL-3508 TA Utrecht, Netherlands

[4] Unite Phys Chim & Phys Mat, B-1348 Louvain, Belgium

来源：

JOURNAL OF LUMINESCENCE | 2006年 / 118卷 / 02期

关键词：

diluted magnetic semiconductors; photoluminescence; ZnO;

D O I：

10.1016/j.jlumin.2005.08.020

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

We performed photoluminescence experiments on colloidal, Co2+-doped ZnO nanocrystals in order to study the electronic properties of Co2+ in a ZnO host. Room temperature measurements showed, next to the ZnO exciton and trap emission, an additional emission related to the Co2+ dopant. The spectral position and width of this emission does not depend on particle size or Co2+ concentration. At 8 K, a series of ZnO bulk phonon replicas appear on the Co2+-emission band. We conclude that Co2+ ions are strongly localized in the ZnO host, making the formation of a Co2+ d-band unlikely. Magnetic measurements revealed a paramagnetic behaviour. (c) 2005 Elsevier B.V. All rights reserved.

引用

页码：245 / 250

页数：6

共 19 条

[1] Magneto-optical properties of ZnO-based diluted magnetic semiconductors [J].