| Autor: |
Tatte, Sonal P., Mishra, G. C., Dhoble, N. S., Dhoble, S. J. |
| Zdroj: |
Luminescence: Journal of Biological & Chemical Luminescence; Oct2024, Vol. 39 Issue 10, p1-6, 6p |
| Abstrakt: |
A fluoride material phosphor doped with rare earth ions Eu3+ and Dy3+ was studied for its photoluminescence (PL) properties. The material was synthesized using a combustion method and characterized using X‐ray diffraction (XRD) and PL techniques. The Na3Ca2(SO4)3F: Eu3+ phosphor exhibits two distinct peaks at 593 nm (orange) and 615 nm (red) at an excitation wavelength of 395 nm. The PL excitation spectrum of the Na3Ca2(SO4)3F: Dy3+ phosphor showed series of peaks, corresponding to the 4f → 4f transitions of Dy3+ ions. Under 350‐nm excitation, the PL emission spectrum revealed two prominent bands one at 483 nm (blue region) due to the 4F₉/₂ → 6H₁₅/₂ transition, and another at 573 nm (yellow region) resulting from the 4F₉/₂ → 6H₁₃/₂ transition. These blue and yellow emissions suggest potential applications in solid‐state lighting, particularly for mercury‐free excitation sources. Rare earth–doped Eu3+/Dy3+ materials exhibit highly efficient PL properties, making them suitable candidates for white light‐emitting diodes (LEDs) or other solid‐state lighting phosphors. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
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