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

被引：37

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

页码：114 / 117

页数：4

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