title: Optical and structural investigation of Dy3+-Nd3+ co-doped in magnesium lead borosilicate glasses.
abstract: 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 Dy(3+) and their energy level scheme in glass network is analyzed. Enhancement of Dy(3+) emission by non-radiative energy transfers from Nd(3+) has been observed here. The samples emits intensive bluish yellow color from the (4)F9/2→(6)H15/2, (6)H13/2 transition of Dy(3+) 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 Dy(3+) ions in the glass network. Along with spectroscopic parameters some physical parameters like density, refractive index etc. are measured for the glasses.
authors.affiliation: Department of Physics, Acharya Nagarjuna University, Nagarjuna Nagar, Guntur, Andhra Pradesh 522 510, India.
authors.forename: T G V M
authors.initials: TG
authors.lastname: Rao
authors.forename: A
authors.initials: A
authors.lastname: Rupesh Kumar
authors.forename: K
authors.initials: K
authors.lastname: Neeraja
authors.forename: N
authors.initials: N
authors.lastname: Veeraiah
authors.forename: M
authors.initials: M
authors.lastname: Rami Reddy
mesh_terms: D002412:Cations / Q000737:chemistry; D004419:Dysprosium / Q000737:chemistry*; D004735:Energy Transfer; D005898:Glass / Q000737:chemistry*; D007854:Lead / Q000737:chemistry*; D049449:Luminescence; D008274:Magnesium / Q000737:chemistry*; D009354:Neodymium / Q000737:chemistry*; D017640:Silicates / Q000737:chemistry*; D017550:Spectroscopy, Fourier Transform Infrared
chemical_list: D002412:Cations; D017640:Silicates; D004419:Dysprosium; D009354:Neodymium; D007854:Lead; D008274:Magnesium
keywords: Dy(3+) ions; Energy transfer; FT-IR spectra; Luminescence; Magnesium lead borosilicate glasses