Blue-light emission from sputtered Ti:SiO_(2) films without annealing

摘要

Blue-light emission from Ti:SiO_(2) sputtered films was observed at room temperature without annealing and it could be seen by the naked eye. The peaks of photoluminescence spectra were located at 3.03-3.05 eV and full width at half maximum ranged from 0.38-0.40 eV, which were almost the same in samples having different energies of absorption edge. SiO_(x) layers may contribute to emission, which are interfacial regions between Ti particles and surrounding SiO_(2) medium, and the size of Ti particles may affect the efficiency of emission.