研究目的
Investigating the spectroscopic properties and up-conversion luminescence of PMMA-based composites doped with rare earth ions for optoelectronic applications.
研究成果
The KGd(WO4)2:Yb3+/Er3+/Tm3+&PMMA composites exhibit effective multicolor up-conversion luminescence in the VIS and NIR spectral range under 980 nm excitation. The vibrational properties and luminescence characteristics suggest that these composites can be used as new phosphors for up-conversion based optoelectronic devices.
研究不足
The study is limited to the spectroscopic properties and up-conversion luminescence of PMMA-based composites under specific conditions. The potential applications in optoelectronic devices are suggested but not extensively explored.
1：Experimental Design and Method Selection:
The study involved the preparation of PMMA-based composites containing KGd(WO4)2:Yb3+/Er3+/Tm3+, KGd(WO4)2:Yb3+/Tm3+, and KGd(WO4)2:Yb3+/Er3+ powders using a solution-mixing method. The vibrational properties were investigated using μ-Raman spectroscopy, and up-conversion luminescence was measured under 980 nm excitation.
2：Sample Selection and Data Sources:
The samples were prepared by incorporating rare earth doped KGd(WO4)2 powders into PMMA matrix. The powders were synthesized using the modified Pechini method.
3：List of Experimental Equipment and Materials:
Renishaw InVia Raman microscope, Ar laser (488 nm), IR laser diode (980 nm), double monochromator, photon-counting system, Zeiss LSM 780 system with tunable infrared femtosecond laser.
4：Experimental Procedures and Operational Workflow:
The Raman spectra were recorded in back-scattering geometry. The up-conversion luminescence spectra were measured under 980 nm excitation, and luminescence maps were created to analyze the distribution of luminescence.
5：Data Analysis Methods:
The Raman spectra were analyzed using software packages WiRE 3.4/Renishaw. The up-conversion luminescence spectra were analyzed to determine the mechanisms of photon activation during the up-conversion process.
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tunable infrared femtosecond laser
Chameleon
Coherent
Used for excitation in luminescence mapping.
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Renishaw InVia Raman microscope
Renishaw
Used for Raman spectroscopy to investigate the vibrational properties of the composites.
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Ar laser
Used for excitation in Raman spectroscopy.
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IR laser diode
Used for excitation in up-conversion luminescence measurements.
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double monochromator
Used for collecting visible emissions in up-conversion measurements.
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photon-counting system
Used for analyzing the signal in up-conversion measurements.
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Zeiss LSM 780 system
Zeiss
Used for luminescence surface imaging of samples.
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