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

Cuong Ton-That; Matthew Foley; Matthew R. Phillips; Takuya Tsuzuki; Zoe Smith

doi:10.1016/j.jallcom.2012.01.116

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

Cuong Ton-That^*, Matthew Foley, Matthew R. Phillips, Takuya Tsuzuki, Zoe Smith

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

41 Citations (Scopus)

Abstract

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.

Original language	English
Pages (from-to)	114-117
Number of pages	4
Journal	Journal of Alloys and Compounds
Volume	522
DOIs	https://doi.org/10.1016/j.jallcom.2012.01.116
Publication status	Published - 5 May 2012
Externally published	Yes

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title = "Correlation between the structural and optical properties of Mn-doped ZnO nanoparticles",

abstract = "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.",

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T1 - Correlation between the structural and optical properties of Mn-doped ZnO nanoparticles

AU - Ton-That, Cuong

AU - Foley, Matthew

AU - Phillips, Matthew R.

AU - Tsuzuki, Takuya

AU - Smith, Zoe

PY - 2012/5/5

Y1 - 2012/5/5

N2 - 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.

AB - 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.

KW - Bandgap

KW - Cathodoluminescence

KW - Doping

KW - ZnO

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DO - 10.1016/j.jallcom.2012.01.116

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VL - 522

SP - 114

EP - 117

JO - Journal of Alloys and Compounds

JF - Journal of Alloys and Compounds

ER -

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

Abstract

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