研究目的
To synthesize Ba2Eu2Ge4O13 for the first time and examine its structural and luminescent properties.
研究成果
The synthesis of Ba2Eu2Ge4O13 is the first step towards creating new optical materials based on Ba2RE2Ge4O13 tetragermanates emitting in a wide spectral range. The compound demonstrates higher luminescence intensity than Y2O3 : 5% Eu3+ under 265–310 nm excitation, suggesting its potential use as a phosphor for LED.
研究不足
The quantum efficiency and light yield of Ba2Eu2Ge4O13 may be enhanced by composition optimization and the introduction of sensitizer ions. The optimization of synthesis conditions should also improve the optical performance.
1：Experimental Design and Method Selection:
The Ba2Eu2Ge4O13 sample was prepared by a solid-state method using BaCO3, Eu2O3, and GeO2 as raw chemicals. The mixtures were heated at various temperatures with intermediate regrinding.
2：Sample Selection and Data Sources:
The crystal structure was determined using X-ray diffraction data.
3：List of Experimental Equipment and Materials:
A STOE STADI–P automated diffractometer equipped with a linear mini-PSD detector was used for XRD patterns.
4：Experimental Procedures and Operational Workflow:
The mixtures were ground, heated, pressed into pellets, and annealed at temperatures ranging from 850 to 1100 °C.
5：Data Analysis Methods:
The crystal structure refinements were carried out with the GSAS program suite.
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