“…Regarding the optics area, these luminescent nanocomposites also provide a suitable alternative to promote the scarce red component of the white light emitting diodes (WLEDs) spectra [19]. Furthermore, these composite films represent an additional solution to the limitation of RE doping concentration in glasses related to low solubility rates and strong tendency to form clusters, which ultimately leads to fluorescence quenching [20,21,22].…”