研究目的
Investigating the plasmon-enhanced upconversion luminescence in pyrochlore phase YbxEr2-xTi2O7 thin film.
研究成果
The study demonstrates that high concentration of Yb3+ ions promotes the formation of pyrochlore phase YETO, which exhibits enhanced UC emission. The introduction of Au NRs further enhances the UC fluorescence due to the LSPR effect, with an optimal enhancement factor of about 2.8 times. This method provides a simple approach to improve UC emission in thin film materials for optical device applications.
研究不足
The study is limited by the concentration range of Yb3+ ions (10-40 mol%) and the annealing temperature (700 ℃). The UC emission enhancement is dependent on the density and distribution of Au NRs, which may vary with preparation conditions.
1：Experimental Design and Method Selection:
The study employs a facile sol-gel method combined with spin-coating technique and post-annealing treatment at 700 ℃ in air atmosphere.
2：Sample Selection and Data Sources:
YETO thin films with different Yb3+ concentrations (10-40 mol%) are prepared. Au NRs are introduced to form Au@YETO nano-composite thin films.
3：List of Experimental Equipment and Materials:
X-ray diffraction (XRD), field emission scanning electron microscopy (FE-SEM), transmission electron microscopy (TEM), fluorescence spectrophotometer, UV-Visible-Infrared spectrophotometry.
4：Experimental Procedures and Operational Workflow:
Spin-coating of Yb3+/Er3+ co-doped TiO2 gel on n-Si substrates, drying at 100 ℃, annealing at 700 ℃, spin-coating Au NRs solutions with various concentrations.
5：Data Analysis Methods:
XRD patterns analysis, SEM and TEM imaging, UC emission spectra recording, absorption spectrum characterization.
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X-ray diffraction
Rigaku Ultima Ⅲ
Rigaku
Determining the crystallinity and phase of the as-prepared thin films.
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Fluorescence spectrophotometer
FLS980
Edinburgh Photonics
Recording UC emission spectra.
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Field emission scanning electron microscopy
Sigma
Characterizing the morphologies and microstructures of thin films.
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Transmission electron microscopy
Tecnai G2 F20
Characterizing the microstructures of thin films and Au NRs.
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UV-Visible-Infrared spectrophotometry
UV3600
Characterizing the absorption spectrum.
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