Spectroscopic properties of Dy3+ doped tellurite glass with Ag/TiO2 nanoparticles inclusion: Judd−Ofelt analysis

Luminescence characteristics of Dy3+ doped sodium alumina borate glass: Role of silver

“…The negative values of the bonding parameter indicate that Dy-O bond has ionic character. Similar bonding nature has been found for Ag and Dy doped glasses [8,20,23].…”

“…As can be seen from table 1, the increment in densities and refractive indexes, especially beyond 1 wt% Ag doping, was explained by the formation of large number of non-bridging oxygens (NBO) owing to the breaking of weak ligands in the glass matrix [23]. The reducing polaron radius and critical distance indicate that the strong bond between Dy and O creates large field strength around the Dy 3+ ions, and enhancement of field strength results in the conversion of [BO 3 ] to [BO 4 ] units [8,30].…”

“…The small δ RMS values are indicative of the validity of fit [42]. Table 6 displays the calculated J-O intensity parameters for H-0.5Dy-yAg glasses along with the other Dy 3+ and Ag doped glass systems [8,19,20,23,26]. Among the J-O parameters Ω 2 characterizes the covalency and asymmetry of the bond between RE ions and oxygen ligands, while Ω 4 and Ω 6 provide information about bulk properties such as rigidity, basicity, and viscosity of glass host [50].…”

“…The changes in density and molar volume have been demonstrated in figure 1(a). Upon addition of Ag, increase in the density from 2.13 to 2.27 g cm −3 and decrease in molar volume indicate the compactness of glass structure [23].…”

“…Dy 3+ ions can be used for white light applications because of their intense emission in blue and yellow region [18]. There are very limited number of studies conducted on Dy 3+ -Ag and Dy 3+ -RE-Ag doped glasses such as borotellurite [8], lead borate [19], magnesium zinc sulfophosphate [20], phosphate [21], tellurite [22][23][24], zinc-magnesium tellurite [25], heavy metal germanium tellurite [26], soda-lime silicate [15], borate [27] and borosilicate [28] for photonic applications.…”