The present work focussed on the preparation and characterization of Al x La 1−x TiO 3 (x = 0.2-0.8) (ALTO) nanospheres. The phase purity and tetragonal structure was confirmed using the X-ray diffraction patterns. In addition, the dimensions of the ALTO unit cell were decreased with increase of Al-content. The morphological investigations evidenced the formation of spherical grains and particles of nano size. The UV-Visible spectra revealed the increasing trend of band gap (E g) from 3.341 to 3.378 eV as a function 'x'. Besides, the frequency, and compositional variation of dielectric parameters was described. Subsequently, the space charge polarization, and electrical conduction mechanisms were well understood using the complex dielectric modulus, and impedance spectroscopy. The Cole-Cole plots ensured that the ALTO materials exhibited the semiconducting nature due to the formation of complete semicircular arcs. Moreover, the non-Debye type relaxations were noticed in Cole-Cole plots.
Europium-doped (0.01–0.04) Al[Formula: see text]La[Formula: see text]TiO3 (AELTO) nanoparticles (NPs) series were synthesized using a hydrothermal method. These NPs were investigated for structural, and morphological studies through XRD, FTIR, FESEM and TEM analysis. Scherrer’s formula and Williamson–Hall (W–H) analysis were employed to determine crystallite size and lattice strain. The crystallite size was decreased with an increase in Eu content up to 0.03 wt.%. The surface morphology and percentage of elementals of AELTO NPs were investigated using FESEM with EDX as well as TEM analysis. The vibrational modes of AELTO NPs were attained by employing FTIR spectra. These modes are deferred mainly on chemical composition, crystallinity, morphology and strain of the AELTO NPs. Optical bandgaps of AELTO NPs were calculated and found to be in the range of 3.40–3.37[Formula: see text]eV with the increase of Eu content. These NPs could find potential applications for solid state lighting and down-shifter for solar energy harvesting.
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