Structural and luminescence characterization of europium-doped niobium germanate glasses and glass-ceramics: Novel insights from ⁹³Nb solid-state NMR spectroscopy

Niobium-93 NMR distinguishes local environments in europium-doped niobium germanate glasses. Increasing niobium content favors more niobium–oxygen–niobium connections, while heat treatment changes the structure and europium luminescence. The study links these atomic environments to optical behavior and demonstrates laser-written waveguides in the glasses.

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Citation

Lia Mara Marcondes, Henrik Bradtmüller, Sabrina Nicoleti Carvalho dos Santos, Lucas Konaka Nolasco, Cleber Renato Mendonça, Silvia Helena Santagneli, Gael Yves Poirier, Marcelo Nalin, "Structural and luminescence characterization of europium-doped niobium germanate glasses and glass-ceramics: Novel insights from ⁹³Nb solid-state NMR spectroscopy", Ceramics International, 2022, 48, 1, 20801-20808.