Influence of Oxide Glass Modifiers on the Structural and Spectroscopic Properties of Phosphate Glasses for Visible and Near-Infrared Photonic Applications

Abstract

The effect of oxide modifiers on multiple properties (structural and spectroscopic) of phosphate glasses with molar composition 60P2O5-(10−x)Ga2O3-30MO-xEu2O3 and 60P2O5-(10−y)Ga2O3-30MO-yEr2O3 (where M = Ca, Sr, Ba; x = 0, 0.5; y = 0, 1) were systematically examined and discussed. The local structure of systems was evidenced by the infrared (IR-ATR) and Raman spectroscopic techniques. The spectroscopic behaviors of the studied glass systems were determined based on analysis of recorded spectra (excitation and emission) as well as luminescence decay curves. Intense red and near-infrared emissions (1.5 μm) were observed for samples doped with Eu3+ and Er3+ ions, respectively. It was found that the value of fluorescence intensity ratio R/O related to 5D0→7F2 (red) and 5D0→7F1 (orange) transition of Eu3+ ions depends on the oxide modifiers MO in the glass host. However, no clear influence of glass modifiers on the luminescence linewidth (FWHM) was observed for phosphate systems doped with Er3+ ions. Moreover, the 5D0 and 4I13/2 luminescence lifetimes of Eu3+ and Er3+ ions increase with the increasing ionic radius of M2+ (M = Ca, Sr, Ba) in the host matrix. The obtained results suggest the applicability of the phosphate glasses with oxide modifiers as potential red and near-infrared photoluminescent materials in photonic devices.

Physical, optical, thermoanalytical, and radiation response study of Eu2O3-doped zinc fluoro-telluroborate glasses

“…Here, Eu 2 O 3 atoms after 2.5 mol% in the matrix stop playing the role of the modifier. In the amorphous network, at 3.0 mol% of Eu 2 O 3 content, the dopant loses its capability of depolymerization, hence increasing the 'V m ' and NBOs [26].…”

Spectral outputs of Yb3+/Pr3+ doped Tellurite glasses for solid-state lighting

“…BaO also provides higher Tg, thermal stability, transmission spectra, and the crosslinking network density to glass materials (16,17). Additionally, high BaO concentrations in the Er 3+ doped phosphate glasses give rise to intense red and near-infrared (NIR) emissions (18).…”

Novel Er3+ doped heavy metals-oxyfluorophosphate glass as a blue emitter

“…Due to their properties, phosphate glasses were regarded as better hosts compared to other host glass networks [8][9][10] .The poor chemical durability of phosphate glass is always treated by addition suitable oxides such as ZnO, MoO3, and Al2O3. On the other hand, inlaying the phosphate network with ZnO improves the optical and electronic properties of phosphate glass [11][12] . Fluoride host materials have a high quantum yield of luminescence due to ionic bonds and low phonon energy of fluoride [13][14] .…”

“…O− ionic group). The presence of this band suggests the ionic character of all studied glasses.The broad band at 1480 cm -1 is assigned to the asymmetric stretching of double bonded P=O modes[11,13,21,24,25] …”