研究目的
Investigating the synthesis and characterization of highly efficient oxide-based red line emitters for smart white LEDs and plant growth applications.
研究成果
The synthesized NaSrGd(MoO4)3:Eu3+ red phosphors exhibit high internal quantum efficiency (82%) and excellent thermal stability, making them suitable for warm white LEDs and plant growth applications. The fabricated white LED showed decent CRI (74%) and CCT (6823 K) values. The Sm3+ and Eu3+ co-doped deep red phosphor covers the absorption spectrum of Phytochrome Pr, indicating its potential for plant growth applications.
研究不足
The study focuses on the synthesis and characterization of red phosphors for white LEDs and plant growth applications. The limitations include the need for further optimization of the phosphor properties for commercial applications and the exploration of other potential applications.
1：Experimental Design and Method Selection:
The Eu3+ ions activated NSGM red phosphors were synthesized by using the solid-state reaction method. All the highly pure starting materials were purchased from Alfa Aesar and used for the synthesis. The stoichiometric amounts of SrCO3, Na2CO3, Gd2O3, Eu2O3, Sm2O3, MoO3 were taken and ground by using an agate mortar and pestle, and calcined at 600oC for 10 hrs and reground, further annealed at 800oC for 10 hrs. Finally, the collected red phosphors were ground again to form fine powder and stored in the container for further analysis.
2：Sample Selection and Data Sources:
The synthesized phosphors were characterized by powder X-ray diffraction (PXRD), SEM, EDX, elemental mapping, FT-IR, DRS, and photoluminescence spectroscopy.
3：List of Experimental Equipment and Materials:
Agate mortar and pestle, calcination furnace, PXRD, SEM, EDX, FT-IR spectrometer, DRS setup, photoluminescence spectrometer.
4：Experimental Procedures and Operational Workflow:
The synthesis involved grinding stoichiometric amounts of starting materials, calcination, annealing, and grinding to fine powder. Characterization involved structural, morphological, and optical analysis.
5：Data Analysis Methods:
The data from PXRD, SEM, EDX, FT-IR, DRS, and photoluminescence spectroscopy were analyzed to determine the structural, morphological, and optical properties of the synthesized phosphors.
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