研究目的
Investigating the optical properties and quantum efficiency of Rb2Bi(PO4)(MoO4):Eu3+ phosphors for application in white LEDs.
研究成果
Rb2Bi(PO4)(MoO4):Eu3+ phosphors exhibit high quantum efficiency, color purity, and thermal stability, making them suitable for application in near-UV LED driven solid-state light sources. Ceramic disks efficiently absorb LED emissions, indicating potential for use in white LEDs.
研究不足
High concentration of Eu3+ makes these phosphors relatively expensive. The absorption of certain LED emissions by ceramic disks is not complete, requiring thicker disks for full absorption.
1：Experimental Design and Method Selection:
Synthesis of Rb2Bi(PO4)(MoO4):Eu3+ phosphors by solid-state reaction method. Optical properties were investigated as a function of excitation wavelength, temperature, and Eu3+ concentration.
2：Sample Selection and Data Sources:
Powder and ceramic samples were prepared with varying Eu3+ concentrations.
3：List of Experimental Equipment and Materials:
Used reagents include MoO3, Rb2CO3, Bi2O3, Eu2O3, and NH4H2PO
4：Equipment includes Rigaku SmartLab diffractometer, Hitachi SU-70 SEM, Bruker Alpha ATR FTIR spectrometer, and Edinburgh Instruments FLS980 spectrometer. Experimental Procedures and Operational Workflow:
Samples were sintered at 600°C, characterized by XRD, SEM, FTIR, and luminescence spectroscopy.
5：Data Analysis Methods:
Quantum efficiency, luminous efficacy, and color coordinates were calculated from emission spectra.
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Rigaku SmartLab diffractometer
SmartLab
Rigaku
X-ray diffraction analysis
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Hitachi SU-70 SEM
SU-70
Hitachi
Scanning electron microscopy
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Bruker Alpha ATR FTIR spectrometer
Alpha ATR
Bruker
Infrared spectroscopy
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Edinburgh Instruments FLS980 spectrometer
FLS980
Edinburgh Instruments
Photoluminescence spectroscopy
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