研究目的
To explore the structural and photoluminescence properties of Dy3+ doped Gd2Zr2O7 phosphors as white light emitting phosphor.
研究成果
The Dy3+ doped Gd2Zr2O7 phosphors synthesized by the hydrothermal method exhibit defect fluorite structure and can emit near white light under UV excitation. The phosphors show potential for application in solid-state lighting technology, with optimal performance at 2 mol% Dy3+ concentration.
研究不足
The study is limited to the synthesis and characterization of Dy3+ doped Gd2Zr2O7 phosphors. The application in solid-state lighting technology requires further optimization and testing under practical conditions.
1：Experimental Design and Method Selection
The phosphors were synthesized by the facile hydrothermal method. The structural and optical properties were characterized by XRD, FESEM, PL, and UV–Vis diffuse reflectance spectroscopy.
2：Sample Selection and Data Sources
Stoichiometrically calculated amounts of Gd(NO3)3·xH2O, ZrOCl2·8H2O, and prepared Dy(NO3)3 were dissolved in deionized water under strong magnetic stirring. The solution was then treated with ammonium hydroxide to achieve pH 10, followed by hydrothermal treatment at 200°C for 20 h.
3：List of Experimental Equipment and Materials
X-ray diffractometer (Rigaku Miniflex 600 Desktop XRD), field emission scanning electron microscope (FESEM, Supra 55), Carry Eclipse UV–Vis-NIR Spectrophotometer, Fluorescence Spectrophotometer, Optistate DN2 (Oxford instrumental).
4：Experimental Procedures and Operational Workflow
The prepared solution was placed in a Teflon-lined stainless-steel autoclave, kept at 200°C for 20 h, and then cooled to room temperature. The precipitates were washed with deionized water and ethanol, dried at 70°C, and annealed at 1200°C.
5：Data Analysis Methods
The crystallite sizes were estimated from the Scherrer equation and Williamson–Hall equations. The optical band gap was estimated by Kubelka–Munk theory. PL decay curves were fitted with a bi-exponential function.
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