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长春光学精密机械与物... [2]
大连理工大学 [1]
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会议论文 [2]
期刊论文 [1]
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2018 [1]
2006 [1]
2005 [1]
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Separating and enhancing the green and red emissions of NaYF4:Yb3+/Er3+ by sandwiching them into photonic crystals with different bandgaps
期刊论文
NANOSCALE HORIZONS, 2018, 卷号: 3, 页码: 616-623
作者:
Liu, Baoqi
;
Meng, Zhipeng
;
Wu, Suli
;
Wu, Yue
;
Zhang, Shufen
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  |  
浏览/下载:9/0
  |  
提交时间:2019/12/02
Energy gap
Luminescence
Nanoparticles
Sandwich structures
Separation, Excitation light
Green emissions
Luminescent material
Red emissions
Single band
Strong luminescence
Upconversion nanoparticles, Photonic crystals
Upconversion luminescence properties of Y2O3:Yb 3+, Er3+ nanostructures (EI CONFERENCE)
会议论文
De G.
;
Qin W.
;
Zhang J.
;
Zhang J.
;
Wang Y.
;
Cao C.
;
Cui Y.
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  |  
浏览/下载:16/0
  |  
提交时间:2013/03/25
Cubic Y2O3 nanostructures doped with Yb3+ and Er3+ ions were synthesized by a facile hydrothermal method. Three distinct shapes such as nanotubes
nanospheres and nanoflakes formed in the products by adjusting the pH value of reacting solution. Powder X-ray diffraction analyses indicate that all the three nanostructures are pure cubic phase
while electron microscopy measurements confirm the formation of different morphologies. These nanostructures exhibit strong visible upconversion luminescence under the excitation of a 978-nm diode laser. In Yb3+- and Er3+- codoped Y2O3 nanocrystals
the relative intensity of green emission became stronger as the size and morphology of sample changed from tubes to flakes. 2006 Elsevier B.V. All rights reserved.
Characterization of ZnO/Mg0.12Zn0.88O heterostructure grown by plasma-assisted molecular beam epitaxy (EI CONFERENCE)
会议论文
13th International Conference on Molecular Beam Epitaxy, August 22, 2004 - August 27, 2004, 13th International Conference on Molecular Beam Epitaxy, August 22, 2004 - August 27, 2004
Lu Y. M.
;
Wu C. X.
;
Wei Z. P.
;
Zhang Z. Z.
;
Zhao D. X.
;
Zhang J. Y.
;
Liu Y. C.
;
Shen D. Z.
;
Fan X. W.
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  |  
浏览/下载:21/0
  |  
提交时间:2013/03/25
In this paper
Mg0.12Zn0.88O/ZnO heterostructures were fabricated on c-plane sapphire (Al2O3) substrates by plasma-assisted molecular beam epitaxy (P-MBE). The quality of the Mg 0.12Zn0.88O alloy thin film was characterized by X-ray diffraction (XRD) and reflection high-energy electron diffraction (RHEED). Optical properties of the Mg0.12Zn0.88O/ZnO heterostructure were studied by absorption and photoluminescence (PL) spectra. At room temperature (RT)
Mg0.12Zn0.88O/ZnO heterostructures show two absorption edges originating from ZnO and Mg 0.12Zn0.88O layers
respectively. In PL spectra
two ultraviolet emission bands related to the ZnO layer and the Mg 0.12Zn0.88O layer were observed. The emission band from Mg0.12Zn0.88O layer dominates at moderately lower temperature
and the luminescence of ZnO becomes gradually important with increasing temperature. This is suggested to exist as a potential barrier in the interface and to restrict the relaxation of the carriers from the Mg 0.12Zn0.88O layer to ZnO layer. As the thickness of ZnO layer decreases
the emission from the Mg0.12Zn0.88O layer becomes weaker and weaker. When the ZnO thickness is up to 2 nm
only the luminescence of the ZnO layer is observed at RT. The quenching of the emission corresponding to the MgZnO layer indicates the existence of a strong injection process in the samples with thinner ZnO layer. 2005 Elsevier B.V. All rights reserved.
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