Optical and structural investigation of Dy³⁺-Nd³⁺ co-doped in magnesium lead borosilicate glasses

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• 作者：T.G.V.M. Rao ; A. Rupesh Kumar ; K. Neeraja ; N. Veeraiah ; M. Rami Reddy
• 关键词：Magnesium lead borosilicate glasses ; Dy3+ ions ; Energy transfer ; Luminescence ; FT-IR spectra
• 刊名：Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy
• 出版年：24 January, 2014
• 年：2014
• 卷：118
• 期：Complete
• 页码：744-751
• 全文大小：1959 K

文摘

MgO-PbO-B₂O₃-SiO₂-Nd₂O₃-Dy₂O₃ glasses are prepared by melt-quenching technique. The samples are characterized by X-ray diffraction (XRD), optical absorption, luminescence and Fourier transform infrared (FT-IR) spectral studied. XRD analysis evidently indicates that the prepared samples are fully amorphous nature. From the optical absorption spectra, the bonding environment surrounding the Dy³⁺ and their energy level scheme in glass network is analyzed. Enhancement of Dy³⁺ emission by non-radiative energy transfers from Nd³⁺ has been observed here. The samples emits intensive bluish yellow color from the ⁴F_9/2 鈫?#xA0;⁶H_15/2, ⁶H_13/2 transition of Dy³⁺ ions in these glasses which are nearer to white light and it is also supported by the chromaticity color coordinates. The FT-IR spectra reveal that network connectivity is increased with replacement of bonds B-O-B, Si-O-Si by more resistant B-O-Si bonds with gradually increasing the content of Dy³⁺ ions in the glass network. Along with spectroscopic parameters some physical parameters like density, refractive index etc. are measured for the glasses.