研究目的
Investigating the design and synthesis of an Eu2+-doped K3ScSi2O7 (KSSO) NIR phosphor with broad-band NIR emission and robust thermal stability for application in NIR pc-LEDs.
研究成果
The study successfully designed and synthesized a NIR broad-band KSSO: Eu2+ phosphor with efficient excitation by blue light and robust thermal stability. The phosphor's application in NIR pc-LEDs shows great potential for high-power devices, indicating a promising direction for future research in NIR light sources.
研究不足
The study focuses on the synthesis and properties of a specific phosphor, and while it demonstrates robust thermal stability, the practical application in high-power devices may require further optimization for efficiency and durability.
1：Experimental Design and Method Selection:
The study involved the design and synthesis of an Eu2+-doped K3ScSi2O7 (KSSO) NIR phosphor. The crystal structure, luminescent properties, mechanism of abnormal NIR emission, thermal stability, and application to NIR pc-LEDs were investigated.
2：Sample Selection and Data Sources:
The samples were KSSO: xEu2+ (
3：01 ≦ x ≦ 05) phosphors. Data sources included XRD patterns, PL and PLE spectra, XPS spectrum, and temperature-dependent PL spectra. List of Experimental Equipment and Materials:
Equipment and materials used included XRD for crystal structure analysis, PL and PLE spectrometers for luminescent properties, XPS for chemical state analysis, and a LED chip for device fabrication.
4：Experimental Procedures and Operational Workflow:
The workflow involved synthesizing the phosphor, analyzing its crystal structure and luminescent properties, measuring thermal stability, and fabricating a pc-LED device.
5：Data Analysis Methods:
Data analysis included Rietveld refinement of XRD patterns, Gaussian fitting of PL spectra, and Arrhenius equation for thermal quenching behavior.
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