研究目的
Investigating the luminescent properties of Ce3t-doped CaSc2O4 phosphors for white LED applications.
研究成果
The CaSc2O4:Ce3t phosphor synthesized through the solid-state method showed improved photoluminescence intensity after washing. It exhibited strong excitation at 450 nm and green emission at 520 nm, with good thermal stability. The optical simulation and fabrication of white LEDs demonstrated that combining the green CaSc2O4:Ce3t phosphor with orange Sr3SiO5:Eu2t phosphor resulted in the best luminous efficacy and color rendering index for white LED applications.
研究不足
The study did not explore the hydration effect of CaSc2O4:Ce3t phosphor on its luminescence performance in depth. The thermal stability and color variation with temperature were noted but not extensively analyzed.
1：Experimental Design and Method Selection:
The synthesis of Ce3t-doped CaSc2O4 phosphor samples was conducted through a solid-state reaction. The raw materials were weighed in stoichiometric ratio, ground, and synthesized at 1400°C for 4 h in a reducing gas. The obtained powders were washed several times in deionized water to remove impurities.
2：Sample Selection and Data Sources:
The samples were identified through X-ray diffraction (XRD) technique, scanning electron microscope (SEM), and energy dispersive X-ray spectrometer (EDS).
3：List of Experimental Equipment and Materials:
XRD (Cu Kα, D/MAX 2500), SEM (TESCAN, VEGA II LSU), EDS (HORIBA), fluorescence spectrophotometer (PSI, DARSA PRO-5200).
4：0). Experimental Procedures and Operational Workflow:
4. Experimental Procedures and Operational Workflow: The measurements of photoluminescence (PL), photoluminescence excitation (PLE) spectra were carried out using a fluorescence spectrophotometer.
5：Data Analysis Methods:
The optical simulation was performed using optical ray-tracing software (LightTools, Optical Research Associates, and Version 8.6.0) based on the Mie scattering theory.
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