研究目的
Investigating the enhanced absorption and energy transfer properties of Sr3Lu2(BO3)4:Ce3+,Tb3+ phosphor for application in UV-pumped white LEDs.
研究成果
The SLBO:Ce3+,Tb3+ phosphor shows good excitation and absorption property for the practical UV pumped white LEDs. The emission color from blue to green with Tb3+ concentration increasing was realized based on energy transfer. Moreover, the title phosphor shows high thermal stability and good quantum efficiency. A warm white LEDs was fabricated using SLBO:Ce3+,Tb3+, CaAlSiN3:Eu2+, and a 365 nm UV LED chip, which shows a color rendering index of 83 and CCT of 3998 K. The results show that as-prepared SLBO:Ce3+,Tb3+ phosphors have potential application in UV-based white LEDs.
研究不足
The study focuses on the synthesis and characterization of SLBO:Ce3+,Tb3+ phosphor for UV-pumped white LEDs. The limitations include the need for further optimization of the phosphor's properties for commercial applications and the exploration of other potential hosts for similar applications.
1：Experimental Design and Method Selection:
The phosphors were synthesized via high temperature solid–state reaction. The starting materials were SrCO3, H3BO3, Lu2O3, CeO2, and Tb4O
2：The raw materials were weighed according to stoichiometric ratio, thoroughly ground, and fired at 1473 K for 8 hours in a reducing atmosphere. Sample Selection and Data Sources:
The composition of particles was examined with SEM. The absorption spectra were measured on a UV–vis–NIR spectrophotometer. The photoluminescence spectra were measured with a fluorescence spectrophotometer.
3：List of Experimental Equipment and Materials:
Rigaku X-ray diffraction (XRD), Bruker Vertex 70 FT-IR, SEM (S3400N), UV–vis–NIR spectrophotometer (SHIMADZU UV-3600), Hitachi F–7000 fluorescence spectrophotometer, Hamamatsu Quantaurus-Tau C11367 fluorescence spectrophotometer, Edinburgh FLS
4：Experimental Procedures and Operational Workflow:
10 The raw materials were ground, fired, and cooled down to ambient temperature. The structure was identified by XRD, FT-IR spectrum was recorded, and the composition was examined with SEM. The absorption and photoluminescence spectra were measured.
5：Data Analysis Methods:
The emission spectra were analyzed to understand the energy transfer process. The temperature-dependent emission spectra were analyzed to understand the thermal stability.
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