Intense blue emission from tantalum-doped silicate glass

Abstract

Articles you may be interested inNear-infrared emission from Eu-Yb doped silicate glasses subjected to thermal reduction Appl. Phys. Lett. 98, 071911 (2011); 10.1063/1.3556316 Ultrabroadband near-infrared emission from a colorless bismuth-doped glass Appl. Phys. Lett. 90, 261110 (2007); 10.1063/1.2752539Broadband near-infrared emission from Tm 3 + ∕ Er 3 + co-doped nanostructured glass ceramics Efficient energy transfer from Si clusters to Er 3 + in complex silicate glassesThe authors report on an intense blue emission centered at 420 nm under ultraviolet excitation from pentavalent tantalum ion-doped silicate glasses. The blue emission is distinctly different from emission due to defects in silica glass, which is also reflected in both absorption spectrum and remarkably enhanced emission. The authors suggest that localized Ta 5d 0 energy level is responsible for the blue emission.

Investigation of the structural environment of Ta in a silicate glass and water system under high P–T conditions

“…In a separate study, the local structural environment of Nb 5+ was found to be sensitive to melt depolymerization and water content, among other factors, in peraluminous and peralkaline glasses [3]. Tantalum silicate glasses show promise for blue laser and luminescent material applications [4], high-transmission optical fibers [5], and for nonlinear-effect photonic structures [6]. Determining the structural role of tantalum and other high-field strength elements in hydrous silicate glasses and melts is fundamentally important to understanding the evolution of magmas in subduction zones.…”

Intense greenish emission from d0 transition metal ion Ti4+ in oxide glass

“…The origin of the emission from nd 0 ion-doped glass materials has not been completely understood yet. 5,6,8 Incorporation of these ions into silicate glasses possibly causes formation of some defects, and as a consequence, the induced defects may give rise to the observed emission. However, electron spin resonance ͑ESR͒ measurements have not shown any evidence for the presence of well-known paramagnetic defects in silica glasses such as nonbridging oxygen hole center ͑ϵSi-O↑, where ↑ means one unpaired electron͒, 9 peroxy radicals ͑ϵSi-O-O↑ ͒, 10 EЈ ͑ϵSi↑ ͒.…”

“…A localized Ta 5+ 5d 0 energy level was proposed to interpret the appearance of blue emission in case of SSCTa, as reported previously. 5,6 The similarity in spectral characteristics between SSCTa and SSCTi suggests that the 3d 0 energy level of Ti 4+ plays an indispensable role in emission processes as well. In both cases of UV and NIFPL excitations, Ti 4+ 3d 0 energy level can accept an excited electron and contribute to the greenish emission.…”

“…5,6 The Ta 5+ -containing soda-lime silicate glasses ͓referred to as SSCTa ͑Refs. 5 and 6͔͒ proved to yield intense blue emission under excitations of UV light or near-infrared femtosecond pulsed laser ͑NIFPL͒.…”

Effects of d0 and s2 cations on optical properties of silicate glasses

“…Critically the absorption cannot be within the visible and NIR where the semiconductor material absorbs as this will lower module efficiency significantly, up to 1.1% for 0.01mol% Fe2O3 SLS front sheets due to these absorption [58]. However, particular metals in certain oxidations states, notably those with a d 0 configuration [74,78,245], have a full outer electron shell, which has traditionally been thought to hamper electronic transitions, produce no d-d absorption bands in the visible or near-IR [246,247] but fluoresce in the visible under UV excitation [179,191,248]. configurations have the propensity for crystal nucleation in glasses due to their large ionic radii, high charge density and predilection for clustering [129].…”