Figure 10From: Effects of crystallization and dopant concentration on the emission behavior of TiO2:Eu nanophosphorsPL spectra of the 5.0% Eu-doped titania nanoparticles. (a) Before and (b) after thermal annealing (left). Schematic illustration of the possible mechanism of energy transfer from the TiO2 host to Eu+3 (right). VB, CB, and DS correspond to the valence band, conduction band, and defect state, respectively.Back to article page