Low-temperature luminescence of different TiO2 modifications

UV to NIR photon conversion in Nd-doped rutile and anatase titanium dioxide films for silicon solar cell application

“…The apparition of this break can be linked to the quenching of self-trapped excitation, seen in Fig. 7 and reported in the literature at 180 K [28]. Such host sensitisation may be ascribed to a phonon-assisted energy transfer process since relatively weak host-to-Ln 3+ sensitisation were observed at 10 K and as the signal is improved when the temperature increases.…”

One step synthesis of N-doped and Au-loaded TiO2 nanoparticles by laser pyrolysis: Application in photocatalysis

“…PL contributions below the optical band gap are generally associated with electronhole recombination mechanisms occurring in the presence of electronic defects [49,50]. In our case, a clear contribution at 2 eV is visible for pure TiO 2 as well as for Au-loaded TiO 2 NPs.…”

On the mechanism of enhanced photocatalytic activity of composite TiO2/carbon nanofilms

“…The spectra are broad (extending from 450 nm to 750 nm) and centered around 630 nm (1.96 eV) and ∼611 nm (2.02 eV) for single and composite films, respectively. Several studies have correlated the origin of this luminescence band to radiative recombination of selftrapped excitons (STEs) [26][27][28]. The STE is supposed to be localized on a TiO 6 octahedron which is the unit structure of anatase [29].…”