The effect of titanium oxide on the optical properties of lithium potassium borate glass

• Main Authors: Mustafa Alajerami, Yasser Saleh, Hashim, Suhairul, Wan Hassan, Wan Muhamad Saridan, Ramli, Ahmad Termizi
• Format: Article
• Published: Elsevier B. V 2012
• Subjects: QD Chemistry
• Online Access: http://eprints.utm.my/id/eprint/47612/; http://dx.doi.org/10.1016/j.molstruc.2012.05.047
• Institution: Universiti Teknologi Malaysia

Borate glass is one of the popular hosts that have been widely used in technological applications. In this work, Li 2O-K 2O-B 2O 3 (LKB) glasses co-doped with different concentration of titanium oxide (TiO 2) have been prepared by chemical quenching technique. The X-ray Diffraction (XRD) results showed the amorphous nature of the sample. Fourier transform infrared (FTIR) spectra, energy band gap, density, ion concentration, molar volume, Polaron radius and inter-nuclear distance and other significant parameters have been analyzed in the light of the different oxidation states of the dopant ions in the glass matrix. Based on the up-conversion phenomenon, the addition of different concentration of TiO 2 ions illustrates its effect on the Photoluminescence (PL) emission of LKB. Due to the change in the activator concentration, a broad blue emission with intensity of around 300 (au) has been observed with 0.3 mol% concentration. Enhancement of about three times has been shown with the increment of 0.7 mol% in concentration. The current results are attributed to electron-phonon vibration obtained after the charge transferred from the valence state (O 2/2p 6) to the conductive state (Ti/3d). The new host showed a non-linear optical relation, that promises to be useful for future optical and electro-optical devices, related to telecommunications, optical storage, and all-optical computing disciplines, particularly for the sample doped with 0.7 mol%.