The role of Ce3+/Ce4+ in the spectroscopic properties of cerium oxide doped zinc-tellurite glasses prepared under air

Photocatalytic Easy Recovery of Orthophosphates Contaminants in Water Using Amberlite‐732 Cationic‐Resin Exchanged by Ce3+and Ce3+‐Au3+ Species

“…For these two catalysts treated under Ar, the Ce 4 + /Ce 3 + couple showed a band situated at 398 nm attributed to Ce 4 + cations (UV domain); while, the second absorbance centered at 605 nm (visible region) was identified to Ce 3 + cations in good agreement with literature data. [39,40] Concerning the oxygen-cerium bond, the absorption signals of our calcined catalysts (containing only Ce 4 + ) are most intense than those of catalysts treated under argon (containing Ce 3 + /Ce 4 + ). This difference in intensity could be related to the exchanged charge O 2À !Ce 4 + expected to be much more important than that of O 2À !Ce 3 + .…”

Recent progress in lanthanide-doped luminescent glasses for solid-state lighting applications—a review

“…The availability of Ce 4+ in glass quenches the luminescence of Ce 3+ due to its strong charge transfer transition [117]. It is well known that the ratio between Ce 3+ /Ce 4+ is highly dependent on glass composition, melting temperature, optical basicity, and melting environment [118,119]. Hence, Ce 3+ and Ce 4+ create an equilibrium with the physically dissolved O 2 of the melt according to 4Ce 3+ + O 2 ↔ 4Ce 4+ + 2O 2− reaction.…”

Float, borosilicate and tellurites as cover glasses in Si photovoltaics: optical properties and performances under sunlight

“…In the Pr 3+ doped TZNL sample we could detect four ground state absorption bands from this dopant and an enhanced overall transmission of light. This may happen due to a small decrease in the refractive index and possibly due to reactions induced by the dopant [32]. A small band at 645 nm was also detected, and attributed to the 3 P 0 -3 F 2 decay of Pr 3+ ions.…”

“…Several works have demonstrated high quantum efficiencies of tellurite glasses, a glass family that we have been investigating in the last few years [26,31,32], and could potentially be used as SCs [33,34]. A few prototypes made with glasses of this family were already investigated [35] and, to the best of our knowledge, they were not evaluated under sunlight or compared to other prototypes made with commercially available glasses, which is the goal of this work.…”

“…To accomplish this comparative study, we also developed an affordable tool to monitor the power output of several prototypes simultaneously, which was used to evaluate their performances under real sunlight. The following glasses were selected for this investigation: low iron float glass; borofloat 33; the TZNL (73.3%Te-19.6%Zn-4.9%Na-2.2%La [32]) and Praseodymium doped (0.1%Pr 6 O 11 ) TZNL glasses. Some key properties of these samples are shown in Table I.…”