Intense red emission of mixed-alkali rare-earth free germanate glass-ceramics with Mn ions

Anastasiia Babkina,Damir Valiev,Ekaterina Kulpina,Aleksandra Pavliuk,Ksenia Zyryanova, Alina Monogarova,Alexander Ignatiev,Natalia Kuzmenko,Evgeny Zhizhin,Aleksandra Koroleva

OPTICAL MATERIALS EXPRESS（2022）

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摘要

A series of germanate glasses with manganese and alkaline ions (Li, Na, K, Rb, Cs) are successfully synthesized. Only 9 out of 21 studied compositions crystallize into glass-ceramics with LiNaGe4O9 and Li2Ge7O15 nanocrystals. The glass-ceramics possess intense emission near 660-670 nm with 37% QY and two-exponential decay with lifetime equal to 1.29 msec. The fabricated materials can be used as a deep-red radiation light source for plant growth cultivation. (C) 2022 Optica Publishing Group under the terms of the Optica Open Access Publishing Agreement

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