Journal
JOURNAL OF LUMINESCENCE
Volume 236, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.jlumin.2021.118077
Keywords
Fluorides; Energy transfer behavior; Photoluminescence properties
Categories
Funding
- Natural Science Foundation of the Jiangsu Higher Education Institutions of China [19KJB510011]
- Six Top Talents of Jiangsu Province [XCL-052]
- Qing Lan Project of Jiangsu Province
- Key NS F Program of Jiangsu Provincial Department of Education [15KJA510004]
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This study synthesized blue-emitting Sr5Al2F16:Eu2+ phosphors through a solid-state reaction, confirming their phase structure and absorption properties. The optimal doping concentration of Eu2+ ions was determined to be 2.0 mol%, with good emission performance across a range of temperatures, suggesting their potential as candidate materials for WLEDs.
A series of blue-emitting Sr5Al2F16:Eu2+ phosphors were prepared by a simple solid-state reaction route. The phase structure was confirmed by the powder X-ray diffraction (XRD) and the Generalized Structure Analysis System (GSAS) refinement program. Under different monitored wavelengths, due to the multiple and distinguishable sites of Eu2+ ions, the phosphors exhibit different absorption bands. The corresponding mechanisms of luminescence property and concentration quenching behavior were proposed in detail. In addition, the optimum doping concentration of Eu2+ ions was eventually proved to be 2.0 mol%. Finally, the temperature-dependent emission properties of Eu2+ ions in Sr5Al2F16 lattice from 10 K to 510 K were conducted to evaluate the thermal stability. All above results indicate that Sr5Al2F16:Eu2+ phosphors can used as an appropriate candidate for the blue-InGaN chips based white light emitting diode (WLEDs) in future.
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