| Abstrakt: |
We present the SrAl2O4:Dy, SrAl2O4:Eu, & SrAl2O4:Dy3+Eu3+phosphors and these samples were prepared by using the urea fuel combustion method at 550 °C. X-ray diffraction pattern indicates monoclinic structure and good crystallinity, Result of Scanning Electron Microscopy (SEM) and Energy Dispersive X-ray (EDX) spectra is exhibited synthesized compound were pure and overall good morphology. By the Brunauer–Emmett–Teller (BET) surface area analyzer, surface area was found 30.462 m2/g of SrAl2O4:Dy0.03Eu0.04. homogeneity, rotational, and vibrational properties were also investigated by FTIR and Raman spectroscopy. By the help of UV–visible spectroscopy band gap (~ 5 eV) was calculated. The photoluminescence properties were studied of SrAl2O4:Dyx, SrAl2O4:Eux, & SrAl2O4:Dy0.03Eux(x = 0.01 to 0.05) samples. In this order, we have found best SrAl2O4:Dy0.03Eu0.04photoluminescent sample rather than other samples. The CIE-1931 color coordinate (0.3103, 0.3035), CCT (6914 K), CRI (94), and color purity (89.1%) were calculated of the SrAl2O4:Dy0.03Eu0.04phosphor. Temperature-dependent photoluminescence spectra were measured of SrAl2O4:Dy0.03Eu0.04phosphor by 395 nm excitation wavelength. Thermoluminescence glow curve were measured of synthesized phosphors and it is exposed to UV radiation (254 nm). Thermo-luminescence trapping parameters, activation energy and average frequency factor were calculated by Chens peak shape method. The obtained SrAl2O4Eu0.05Dy0.04is fine phosphor and it has good PL, TL properties due to perfect doping concentration of Dy and Eu, higher elemental purity and perfect crystalline morphology. Therefore, SrAl2O4-based phosphor activated by Dy and Eu metals may be used for future prospective WLEDs applications. |
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