A series of undoped mixed-phase BaAl2O4/CaAl4O7 (hereafter called BC) and doped BC: x% Eu (0< ... more A series of undoped mixed-phase BaAl2O4/CaAl4O7 (hereafter called BC) and doped BC: x% Eu (0< x≤ 5.5) nanophosphors were successfully prepared by the citrate sol-gel technique. (eir structure, morphology, and optical properties were studied in detail by X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), and photoluminescence (PL) spectroscopy. XRD and SEM showed that all the BC:x%Eu samples consisted of the crystalline structure of the mixed phases of both the BaAl2O4 and CaAl4O7 materials.(e structure resembles more that of the BaAl2O4 than the CaAl4O7 phase. (e TEM results suggest that the crystallite sizes are in the nanometer scale with rod-like particles. PL results showed multiple emission peaks located at 436, 590, 616, 656, and 703 nm, which were assigned to the intrinsic defects within the BC matrix, D0⟶ F1, D0⟶ F2, D0⟶ F3, and D0⟶ F4 transitions of Eu, respectively.(e decay curves evidently showed that the nanophosphors ...
A series of undoped mixed-phase BaAl2O4/CaAl4O7 (hereafter called BC) and doped BC: x% Eu (0< ... more A series of undoped mixed-phase BaAl2O4/CaAl4O7 (hereafter called BC) and doped BC: x% Eu (0< x≤ 5.5) nanophosphors were successfully prepared by the citrate sol-gel technique. (eir structure, morphology, and optical properties were studied in detail by X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), and photoluminescence (PL) spectroscopy. XRD and SEM showed that all the BC:x%Eu samples consisted of the crystalline structure of the mixed phases of both the BaAl2O4 and CaAl4O7 materials.(e structure resembles more that of the BaAl2O4 than the CaAl4O7 phase. (e TEM results suggest that the crystallite sizes are in the nanometer scale with rod-like particles. PL results showed multiple emission peaks located at 436, 590, 616, 656, and 703 nm, which were assigned to the intrinsic defects within the BC matrix, D0⟶ F1, D0⟶ F2, D0⟶ F3, and D0⟶ F4 transitions of Eu, respectively.(e decay curves evidently showed that the nanophosphors ...
Uploads
Papers by bamba Mahman