研究目的
Investigating the luminescence properties of Dy3t doped LiPbB5O9 phosphors for white LED applications.
研究成果
The LiPbB5O9:Dy3t phosphor, especially at 0.4 mol% Dy3t concentration, is a suitable material for the fabrication of white LEDs and laser applications due to its optimal luminescence properties, including the yellow to blue intensity ratio, critical distance, and energy transfer parameters. The CIE color coordinates and coordinate color temperatures indicate its potential for cool white light generation.
研究不足
The study is limited to the investigation of Dy3t doped LiPbB5O9 phosphors and their luminescence properties for white LED applications. The potential for optimization in the synthesis process and the exploration of other dopants or host materials are not addressed.
1：Experimental Design and Method Selection:
The LiPbB5O9:Dy3t phosphors were prepared through solid state reaction procedure using analytical grade powders.
2：Sample Selection and Data Sources:
The reactants were homogeneously mixed according to their stoichiometric proportion and milled evenly by agate mortar.
3：List of Experimental Equipment and Materials:
X-ray diffraction studies were executed by Bruker, D8 advance diffractometer, FTIR characterization was performed with Perkin Elmer 100 IR spectrometer, SEM analysis was performed with Evo MA15, Carl Zeiss model scanning electron microscope, TG-DSC studies were performed up to 800°C, Photoluminescence and decay curve characterizations were performed by FL-21TCSPC model fluorescence spectrometer.
4：Experimental Procedures and Operational Workflow:
The mixture was transferred to silica crucible and it was preheated for 2 h at 500°C. After this, the products were grounded to fine powders. Finally, the mixture was re-sintered for 10 h at 630°C then cooled to the room temperature.
5：Data Analysis Methods:
The crystallite size was calculated using the Debye-Scherrer model, the microstrain was calculated using Williamson-Hall analysis, and the luminescence properties were analyzed using photoluminescence spectroscopy.
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