研究目的
Investigating the synthesis, optical properties, thermal behavior, and LED packaging of Eu3t doped lutetium tungsten molybdenum oxide phosphors for potential applications in UV LEDs.
研究成果
The synthesized lutetium tungsten molybdenum oxide phosphors, particularly Eu3t doped Lu2WMoO9, exhibit enhanced photoluminescence properties and red shift excitation bands, making them suitable for application in UV LED devices. The study demonstrates the potential of these materials in phosphor-converted UV LEDs, with implications for future research in optimizing their performance and stability.
研究不足
The study focuses on the synthesis and characterization of specific phosphor materials, with potential limitations in scalability and practical application in LED devices. The thermal stability of certain phosphors under UV excitation was noted to be less optimal compared to deep UV excitation.
1：Experimental Design and Method Selection:
The study employed a solid-state reaction method to synthesize various lutetium tungsten molybdenum oxide phosphors by adjusting molar ratios of raw materials.
2：Sample Selection and Data Sources:
Raw materials included tungsten oxide (WO3, A.R.), molybdenum trioxide (MoO3,
3：99%), lutetium oxide (Lu2O3, 99%), and europium oxide (Eu2O3, 99%). List of Experimental Equipment and Materials:
Characterization was performed using X-ray diffraction (XRD), scanning electron microscope (SEM), energy-dispersive spectra (EDS), diffuse reflection (DR) spectra, photoluminescence (PL) excitation and emission spectra, luminescence decay curves, and temperature dependent PL spectra.
4：Experimental Procedures and Operational Workflow:
The synthesis involved mixing raw materials in specific ratios, followed by solid-state reaction, and subsequent characterization.
5：Data Analysis Methods:
Data analysis included evaluating energy gap values from DR spectra, analyzing PL spectra for excitation and emission properties, and assessing thermal stability through temperature-dependent PL measurements.
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