研究目的
Investigating the electric field poling modulated upconversion photoluminescence response in Er3+ doped BCZT piezoelectric ceramics to explore the interplay between piezoelectric and photoluminescence properties.
研究成果
The research demonstrates that electric field poling in BCZT: Er3+ ceramics induces structural transformation from tetragonal to rhombohedral phase, leading to photoluminescence quenching and changes in Stark line intensities. This provides a noncontact method to monitor piezoelectric constant d33 and highlights the potential for multifunctional optoelectronic devices. Future studies could focus on other dopants or real-time in situ measurements.
研究不足
The study is limited to Er3+ doped BCZT ceramics at a specific composition; other dopants or compositions are not explored. The electric field poling effects are investigated up to 5 kV/mm, and the mechanism relies on structural changes, which may not generalize to all piezoelectric materials. Potential optimizations include varying doping concentrations or exploring other rare-earth ions.
1：Experimental Design and Method Selection:
The study employs a traditional solid-state reaction method to prepare BCZT: Er3+ ceramics, followed by electric field poling to investigate structural and photoluminescence changes. Theoretical models include Judd-Ofelt theory for explaining photoluminescence behavior.
2：Sample Selection and Data Sources:
Samples are BCZT: Er3+ ceramics with 1.5 mol% Er3+ doping, prepared from high-purity starting powders (BaCO3, CaCO3, TiO2, ZrO2, Er2O3). Data sources include XRD for structural analysis, PL spectra for luminescence, and electrical measurements for ferroelectric and piezoelectric properties.
3：5 mol% Er3+ doping, prepared from high-purity starting powders (BaCO3, CaCO3, TiO2, ZrO2, Er2O3). Data sources include XRD for structural analysis, PL spectra for luminescence, and electrical measurements for ferroelectric and piezoelectric properties. List of Experimental Equipment and Materials:
3. List of Experimental Equipment and Materials: Equipment includes high-resolution XRD (D8 Advanced, Bruker AXS), FESEM (FEI, Quanta FEG450), spectrofluorometer (FS5, Edinburgh Instruments), d33 meter (ZJ-4AN), and ferroelectric analyzer (TF Analyzer 2000E, AixACCT Systems). Materials include agate balls, alcohol, alumina crucibles, and silver electrodes.
4：Experimental Procedures and Operational Workflow:
Powders are mixed, milled, calcined, pressed into disks, sintered, polished, and coated with electrodes. Poling is done under DC fields (0-5 kV/mm) for 30 min. Characterization involves XRD, SEM, PL spectra, d33 measurement, and P-E hysteresis loops.
5：Data Analysis Methods:
XRD data are analyzed using Gaussian fitting for phase fractions. PL spectra are normalized and analyzed for intensity and Stark splitting. Piezoelectric and ferroelectric data are plotted against electric field.
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Field emission scanning electron microscope
Quanta FEG450
FEI
Measurement of surface morphology and energy dispersive spectroscopic characterization
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Spectrofluorometer
FS5
Edinburgh Instruments
Measurement of upconversion luminescence emission spectra
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X-ray powder diffraction
D8 Advanced
Bruker AXS
Characterization of phase purity and structure of samples
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d33 meter
ZJ-4AN
Measurement of quasi-static piezoelectric coefficients
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Ferroelectric analyzer
TF Analyzer 2000E
AixACCT Systems
Achievement of polarization-electric field hysteresis loops
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Planetary ball mill
Milling of starting powders
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High voltage amplifier
Application of DC fields for poling process
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