Nano-crystallization of ln-fluoride crystals in glass-ceramics via inducing of yb3+ for efficient near-infrared upconversion luminescence of tm3+

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Abstract

Transparent glass-ceramic composites embedded with Ln-fluoride nanocrystals are pre-pared in this work to enhance the upconversion luminescence of Tm3+ . The crystalline phases, microstructures, and photoluminescence properties of samples are carefully investigated. KYb3 F10 nanocrystals are proved to controllably precipitate in the glass-ceramics via the inducing of Yb3+ when the doping concentration varies from 0.5 to 1.5 mol%. Pure near-infrared upconversion emissions are observed and the emission intensities are enhanced in the glass-ceramics as compared to in the precursor glass due to the incorporation of Tm3+ into the KYb3 F10 crystal structures via substitu-tions for Yb3+ . Furthermore, KYb2 F7 crystals are also nano-crystallized in the glass-ceramics when the Yb3+ concentration exceeds 2.0 mol%. The upconversion emission intensity of Tm3+ is further enhanced by seven times as Tm3+ enters the lattice sites of pure KYb2 F7 nanocrystals. The designed glass ceramics provide efficient gain materials for optical applications in the biological transmission window. Moreover, the controllable nano-crystallization strategy induced by Yb3+ opens a new way for engineering a wide range of functional nanomaterials with effective incorporation of Ln3+ ions into fluoride crystal structures.

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APA

Li, J., Long, Y., Zhao, Q., Zheng, S., Fang, Z., & Guan, B. O. (2021). Nano-crystallization of ln-fluoride crystals in glass-ceramics via inducing of yb3+ for efficient near-infrared upconversion luminescence of tm3+. Nanomaterials, 11(4). https://doi.org/10.3390/nano11041033

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