Abstract
Sm[Formula: see text] -doped ZrO2 (SDZ) nanocrystals were prepared via a hydrothermal route without subsequent calcination. These samples underwent a series of characterizations, including X-ray diffraction (XRD), scanning electron microscopy (SEM), ultraviolet–visible (UV–Vis) spectroscopy, and photoluminescence (PL) spectral. The results showed pure cubic ZrO2 nanocrystals, with a crystallite size of 8.4 nm, were achieved by doping 8 mol% Sm[Formula: see text]. It was observed that the concentration of Sm[Formula: see text] had a significant impact on the crystallite structure of the samples, which exhibited an array of spherical shape and irregular aggregates. The inclusion of PL emission bands, spanning from the ultraviolet to blue-green range, highlighted three distinct bands. These were analyzed using Gaussian fittings and were attributed to three different types of defects, referred to as the F, F1, and F2 centers, respectively.
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