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학술대회자료

Ammonium Fluoride Concentrations Effect on the Luminescence Characteristics of NaBiF₄:Eu³+ Phosphor Powders by Ultra-Fast Synthesis

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Recently, rare-earth (RE) ions activated inorganic materials considerable interest has been gained because of these material applicability in various fields, such as field emission displays (FEDs), clean energy, solid-state lighting, optical thermometers and light emitting diodes (LEDs), and so on.[1] Specially, the white light emitting diodes (WLEDs), which are regarded as a promising candidate to replace these traditional bulbs and treated as the next generation lighting source, have been extensively researched owing to their enviable characteristics of low energy consumption, high luminescence efficiency, long working lifetime and environmentally friendly feature.[2] In this study, to extend the applicability of the WLED using phosphor materials, the NaBiF4:Eu3+ nanophosphors were successfully prepared by ultra-fast synthesis method at room temperature and the influence of NH4F content on the luminescence properties effected on phase structure and morphology. As is known, many factors, such as luminescent host material, dopant material concentration, and particle size can affect the luminescence characteristics of RE ions actuvated materials. The characterizations of NaBiF4:Eu3+ phosphor powders were performed by using PL, FE-SEM, and XRD. In addition, to explore the practucal application of the final compounds in solid-state lighting, a WLED device was fabricated by integrating an NUV LED chip and a ixture of the studied nanoparticles.

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