The effect of CUO and MGO impurities on the optical properties of lithium potassium borate glass

• Main Authors: Mustafa Alajerami, Yaser Saleh, Hashim, Suhairul, Wan Hassan, Wan Muhamad Saridan, Ramli, Ahmad Termizi
• Format: Article
• Published: Elsevier B. V 2012
• Subjects: QC Physics
• Online Access: http://eprints.utm.my/id/eprint/47605/; http://dx.doi.org/10.1016/j.physb.2012.03.029
• Institution: Universiti Teknologi Malaysia

Previous study proved the efficiency of copper as one of the most luminescent activators. In this work, Li 2CO 3-K 2CO 3-H 3BO 3 (LKB) glasses co-doped with copper oxide (CuO) and magnesium oxide (MgO) have been prepared by chemical quenching technique. Two techniques have been applied to investigate the effect of co-dopants on the physical and optical properties of the new glass network. 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 have been analyzed in the light of the different oxidation states of co-doped ions in the glass matrix. The exchange in the concentration of magnesium and copper ions illustrated the great effect of magnesium as a co-dopant on the Photoluminescence (PL) emission of LKB doped with copper oxide. Due to the change in the copper concentration, a broad green emission with intensity of around 300 (a.u) has been observed. Enhancement of about three times has been shown with the increment of 0.1 mol% of CuO and MgO as a co-dopant technique. It is well known that magnesium oxide alone does not show strong-luminescence, but during this increment, MgO acted as activator (co-dopant) for Cu ions. This enhancement may contribute to the energy transfer from Mg 2 ions to monovalent Cu + ion. The current results are discussed and compared with other related studies.