Optical emission bands of Sm2O3 and their link with crystalline defects and 4fd→4fd electronic transitions at UV-Vis region

Crystalline native defects in ZnO analyzed by photoluminescence applying Maxwell-Boltzmann statistics in the visible region

“…These experimental results are generally concerned with high lifetimes [15,16]. The presence of a detectable PL emission bands in the nanocristal, characterized by the presence of ZnO, demonstrates that Zn 2+ cation are already optically active in this crystalline configuration.…”

“…The experimental emission band recorded here, they are asymmetric implies different signals overlapping each other. We performed an analysis of nanocrystal emission bands located at UV-Vis region, applying the statistical theoretical model based on Maxwell-Boltzmann (MBM) distributions, in this context, several detailed studies have been carried out [15,16,51]. The emission band applying the MBM is indicated by a sky blue stripe.…”

“…Using the spectra obtained through the Photoluminescence spectroscopic technique located at UV-Vis region, the emission bands are assigned to crystalline defects associated with vacancies, intertices, stacking faults, different pollutants, stoichiometry, etc., are examined to find the correlation of these emission signals with the native crystalline defects [15]. Applying the theoretical model of Maxwell-Boltzamann statistics (MBM), the native defects are associated with vacancies/interstices, which in a first approximation are considered as particles that present corpuscular behavior [16].…”

Sm2O3 and Sm2O3-based nanostructures for photocatalysis, sensors, CO conversion, and biological applications

“…Foam-like Sm 2 O 3 NPs have been prepared by Mora-Ramírez et al through chemical bath deposition. 47 An average grain size between 22.10 and 28.20 nm was obtained which showed optical absorption bands located at ∼277 nm and ∼408 nm in the UV-vis region. Sm 2 O 3 nanoplatelets have been synthesized using the electrodeposition technique.…”

Laser polarization-controlled photoreduction of samarium ions in sodium aluminoborate glass

“…As one can see, for the Sm 3+ -doped sample, the small peaks at about 402, 375, 360 nm can be ascribed to the 4f-4f transitions of Sm 3+ , and the strong band centered at about 250 nm and trailing to 300 nm can be mainly ascribed to the CTB of Sm 3+ . [38][39][40][41] Based on previous knowledge and the experimental observations here, the following transitions are considered to occur in the photoreduction. As shown in Fig.…”