Correlation between the structural and optical properties of Mn-doped ZnO nanoparticles

被引：32
|
作者：
Ton-That, Cuong [1 ]
Foley, Matthew [1 ]
Phillips, Matthew R. [1 ]
Tsuzuki, Takuya [2 ]
Smith, Zoe [2 ]
机构：
[1] Univ Technol Sydney, Sch Phys & Adv Mat, Broadway, NSW 2007, Australia
[2] Deakin Univ, Ctr Mat & Fibre Innovat, Geelong, Vic 3217, Australia
来源：
JOURNAL OF ALLOYS AND COMPOUNDS | 2012年 / 522卷
关键词：
ZnO; Doping; Bandgap; Cathodoluminescence; THIN-FILMS; MAGNETIC-PROPERTIES; LUMINESCENCE-CENTERS; ZINC-OXIDE; NANOCRYSTALS; FERROMAGNETISM; SEMICONDUCTOR; MG;
D O I：
10.1016/j.jallcom.2012.01.116
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：
The crystallographic and optical properties of Mn-doped ZnO nanoparticles prepared by a sol-gel process have been investigated by X-ray diffraction, UV-visible absorption spectroscopy and cathodoluminescence microanalysis. X-ray diffraction reveals that the nanoparticles have hexagonal wurtzite crystal structure, with the lattice constants along the a-and c-axes increasing with increasing Mn concentration from 0 to 2.4 at%. For all Mn concentrations in this range, the nanoparticles are essentially free of native point defects so that they exhibit only band-edge luminescence. The optical bandgap and band-edge emission energies for Mn-doped ZnO were found to increase in proportion to the lattice constants. The direct correlation between the bandgap and crystal structure suggests that the band-edge optical properties of Mn-doped ZnO is predominantly influenced by the amount of Mn atoms substituting Zn on the lattice sites. (C) 2012 Elsevier B. V. All rights reserved.
引用
收藏
页码：114 / 117
页数：4
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