Improved Visible Emission from ZnO Nanoparticles Synthesized via the Co-Precipitation Method
被引:15
作者:
Apostoluk, Alexandra
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Univ Lyon, INL INSA Lyon, CNRS, UMR 5270, F-69621 Villeurbanne, FranceUniv Lyon, INL INSA Lyon, CNRS, UMR 5270, F-69621 Villeurbanne, France
Apostoluk, Alexandra
[1
]
Zhu, Yao
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Univ Lyon, INL INSA Lyon, CNRS, UMR 5270, F-69621 Villeurbanne, FranceUniv Lyon, INL INSA Lyon, CNRS, UMR 5270, F-69621 Villeurbanne, France
Zhu, Yao
[1
]
Gautier, Pierrick
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机构:
Univ Lyon, IRCE Lyon, CNRS, UMR 5256, F-69626 Villeurbanne, FranceUniv Lyon, INL INSA Lyon, CNRS, UMR 5270, F-69621 Villeurbanne, France
Gautier, Pierrick
[2
]
Valette, Audrey
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Univ Lyon, IRCE Lyon, CNRS, UMR 5256, F-69626 Villeurbanne, FranceUniv Lyon, INL INSA Lyon, CNRS, UMR 5270, F-69621 Villeurbanne, France
Valette, Audrey
[2
]
Bluet, Jean-Marie
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Univ Lyon, INL INSA Lyon, CNRS, UMR 5270, F-69621 Villeurbanne, FranceUniv Lyon, INL INSA Lyon, CNRS, UMR 5270, F-69621 Villeurbanne, France
Bluet, Jean-Marie
[1
]
Cornier, Thibaut
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Univ Lyon, IRCE Lyon, CNRS, UMR 5256, F-69626 Villeurbanne, FranceUniv Lyon, INL INSA Lyon, CNRS, UMR 5270, F-69621 Villeurbanne, France
Cornier, Thibaut
[2
]
Masenelli, Bruno
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Univ Lyon, INL INSA Lyon, CNRS, UMR 5270, F-69621 Villeurbanne, FranceUniv Lyon, INL INSA Lyon, CNRS, UMR 5270, F-69621 Villeurbanne, France
Masenelli, Bruno
[1
]
Daniele, Stephane
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机构:
Univ Lyon, IRCE Lyon, CNRS, UMR 5256, F-69626 Villeurbanne, France
Univ Claude Bernard Lyon 1, Univ Lyon, C2P2 UMR 5265, ESCPE Lyon, BP 2077, F-69616 Villeurbanne, FranceUniv Lyon, INL INSA Lyon, CNRS, UMR 5270, F-69621 Villeurbanne, France
Daniele, Stephane
[2
,3
]
机构:
[1] Univ Lyon, INL INSA Lyon, CNRS, UMR 5270, F-69621 Villeurbanne, France
[2] Univ Lyon, IRCE Lyon, CNRS, UMR 5256, F-69626 Villeurbanne, France
[3] Univ Claude Bernard Lyon 1, Univ Lyon, C2P2 UMR 5265, ESCPE Lyon, BP 2077, F-69616 Villeurbanne, France
Since ZnO nanoparticles (NPs) possess a variety of intrinsic defects, they can provide a wide spectrum of visible emission, without adding any impurity or any doping atoms. They are attracting more and more interest as a material for light sources and energy downshifting systems. However, defect emission with a high luminescence quantum efficiency (PL QY) is difficult to obtain. Here, we present the co-precipitation synthesis parameters permitting to attain ZnO NPs with highly visible PL QYs. We found that the nature of zinc precursors and alkaline hydroxide (KOH or LiOH) used in this method affects the emission spectra and the PL QY of the as-grown ZnO NPs. LiOH is found to have an advantageous effect on the visible emission efficiency when added during the synthesis of the ZnO NPs. More precisely, LiOH permits to increase the emission efficiency in the visible up to 13%. We discuss the effects of the nanoparticle size, the morphology and the surface stabilization on the enhancement of the luminescent emission efficiency. Various spectral contributions to the luminescent emission were also examined, in order to achieve a control of the defect emission to increase its efficiency.
机构:
Univ Free State, Dept Chem, Bloemfontein, South Africa
Univ Nigeria, Dept Pure & Ind Chem, Nsukka, NigeriaUniv Free State, Dept Chem, Bloemfontein, South Africa
机构:
Univ Free State, Dept Chem, Bloemfontein, South Africa
Univ Nigeria, Dept Pure & Ind Chem, Nsukka, NigeriaUniv Free State, Dept Chem, Bloemfontein, South Africa