研究目的
Investigating the luminescence properties of Dy3+-doped Na3Gd(PO4)2 nanophosphor for solid state white LEDs.
研究成果
The Dy3+-doped Na3Gd(PO4)2 nanophosphors synthesized via citrate gel combustion technique exhibit efficient white light emission, making them suitable candidates for white LED applications. The optimal Dy3+ concentration was found to be 1.0 mol%, with CIE chromaticity coordinates close to the standard white light point.
研究不足
The study focuses on the luminescence properties under specific conditions and does not explore the full range of potential applications or environmental impacts of the nanophosphors.
1：Experimental Design and Method Selection:
The study employed the citrate gel combustion technique for synthesizing Dy3+-doped Na3Gd(PO4)2 nanophosphors. This method was chosen for its ability to produce nanoparticles with controlled size and morphology.
2：Sample Selection and Data Sources:
High-purity Na2CO3, Gd2O3, NH4H2PO4, Dy2O3, and citric acid were used as starting materials.
3：List of Experimental Equipment and Materials:
A Seifert X-ray Diffractometer, Oxford instruments INCA PENTA FETx3 attached to SEM: Carl Zeiss EVO MA15, Thermo Nicolet IR200 spectrophotometer, and Jobin YVON Fluorolog-3 spectrofluorimeter were used for characterization.
4：Experimental Procedures and Operational Workflow:
The synthesis involved dissolving stoichiometric amounts of oxides and carbonates in nitric acid, adding citric acid, drying the gel, and then calcining at 900°C.
5：Data Analysis Methods:
The luminescence properties were analyzed using photoluminescence, excitation, emission spectra, and decay time measurements.
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