Enhanced near-infrared emission in Yb³⁺-Cr³⁺ codoped KZnF₃ glass ceramics excited by a solar simulator

Wang, Xin, Li, Wenhao, Tian, Ke, Lewis, Elfed, Wang, Shunbin, Brambilla, Gilberto, Dong, Yongkang, Wu, Xiao and Wang, Pengfei (2019) Enhanced near-infrared emission in Yb³⁺-Cr³⁺ codoped KZnF₃ glass ceramics excited by a solar simulator. Ceramics International, 45 (6), 6738-6743. (doi:10.1016/j.ceramint.2018.12.164).

Abstract

Cr³⁺-Yb³⁺ codoped bulk glass-ceramics containing KZnF₃ nanocrystals are fabricated by thermal treatment of cast glass samples and characterized by X-ray diffraction and transmission electron microscopy. The luminescent properties of the glass and glass ceramic are investigated from the measured photoluminescence spectra and fluorescent lifetime. The measurement results demonstrate that Cr³⁺ and Yb³⁺ ions are both predominantly hosted in the KZnF₃ nanocrystals, and the energy absorbed by Cr³⁺ ions is efficiently transferred to Yb³⁺ ions when excited at 450 nm. Compared to the glass, the near-infrared emission in the Cr³⁺-Yb³⁺ codoped glass ceramics is significantly enhanced when the excitation wavelength lies in the range λ~400–800 nm of a solar simulator. Results indicate that the Cr³⁺-Yb³⁺ codoped KZnF₃ glass ceramic provides a promising material for spectral conversion from visible sunlight to near-infrared emission and a novel gain material for solar pumped fiber laser.

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Contributors

Author: Gilberto Brambilla

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