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

• Published in: Journal of molecular structure 2012-10, Vol.1026, p.159-167
• Main Authors: Alajerami, Yasser Saleh Mustafa, Hashim, Suhairul, Wan Hassan, Wan Muhamad Saridan, Ramli, Ahmad Termizi
• Format: Article
• Language: English
• Subjects: Borates; Density; Devices; Emission; energy; Fourier transform infrared spectroscopy; Glass; ions; lithium; Lithium potassium borate; Molecular structure; Optical properties; oxidation; Photoluminescence; potassium; telecommunications; titanium; Titanium dioxide; Titanium oxide; Titanium oxides; vibration; X-ray diffraction
• ISSN: 0022-2860; 1872-8014
• DOI: 10.1016/j.molstruc.2012.05.047

Borate glass is one of the popular hosts that have been widely used in technological applications. In this work, Li2O–K2O–B2O3 (LKB) glasses co-doped with different concentration of titanium oxide (TiO2) 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 TiO2 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 0.3mol% concentration. Enhancement of about three times has been shown with the increment of 0.7mol% in concentration. The current results are attributed to electron–phonon vibration obtained after the charge transferred from the valence state (O2/2p6) 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 0.7mol%.