研究目的
Investigating the synthesis, energy transfer, and multicolor luminescent property of Eu3+-doped LiCa2Mg2V3O12 phosphors for warm white light-emitting diodes.
研究成果
The study successfully synthesized Eu3+-doped LCMVO phosphors with tunable multicolor luminescence, demonstrating potential applications in near ultraviolet chip-excited white light-emitting diodes. The energy transfer mechanism from (VO4)3- to Eu3+ was explained, and the phosphors showed good thermal stability and quantum efficiency.
研究不足
The thermal stability of the phosphors is limited, with the temperature for 50% of the PL intensity being approximately 60 and 70 oC for LCMVO and LCMVO: 0.01Eu3+ phosphors, respectively.
1:Experimental Design and Method Selection:
The Eu3+-doped LiCa2Mg2V3O12 phosphors were prepared by conventional solid-state reaction. The raw materials were weighed according to stoichiometry, grinded thoroughly, and sintered at 800 °C for 4 h.
2:Sample Selection and Data Sources:
The phase structure was checked using XRD, morphology was examined by SEM, and spectroscopic properties were characterized with a spectrofluorometer.
3:List of Experimental Equipment and Materials:
XRD (DMAX2500 RIGAKU), SEM, Edinburgh Instruments FS5 spectrofluorometer, and Edinburgh Instruments (FLS 980) equipped with dynamic-heating device.
4:Experimental Procedures and Operational Workflow:
The products were crushed into powders after calcination for further characterization.
5:Data Analysis Methods:
The luminescence decay curves were fitted based on a bi-exponential equation to describe the energy transfer.
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XRD
DMAX2500
RIGAKU
Phase structure checking
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spectrofluorometer
FS5
Edinburgh Instruments
Spectroscopic properties characterization
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dynamic-heating device
FLS 980
Edinburgh Instruments
PL spectra characterization at various temperature
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SEM
Morphology examination
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