The effect of CuO and MgO impurities on the optical properties of lithium potassium borate glass

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• 作者：Yasser Saleh Mustafa Alajerami^a ; ^b ; ^{yasser_ajr@hotmail.com} ; Suhairul Hashim^a ; Wan Muhamad Saridan Wan Hassan^a ; Ahmad Termizi Ramli^a
• 关键词：Optical properties ; Photoluminescence ; Lithium potassium borate ; Copper impurities ; Magnesium impurities
• 刊名：Physica B
• 出版年：2012
• 期刊代码：53_09214526
• 类别：ph
• 出版时间：1 July, 2012
• 卷：407
• 期：13
• 页码：2390-2397
• 文件大小：1080 K

摘要

Previous study proved the efficiency of copper as one of the most luminescent activators. In this work, Li₂CO₃-K₂CO₃-H₃BO₃ (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 Mg²⁺ ions to monovalent Cu⁺ ion. The current results are discussed and compared with other related studies.