Cr3+ doped CaF2 transparent ceramic with effective broadband near-infrared emission

•Non-rare earth ion doped (CaF2:Cr3+) fluoride transparent ceramic has been prepared.•The ceramics showed high transmittance with 83% at the wavelength of 1200 nm.•The ceramics showed effective broadband NIR emission with a FWHM of 130 nm. Cr3+ has attracted much attention as activator because of th...

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Bibliographic Details
Published in:Materials letters 2023-09, Vol.346, p.134506, Article 134506
Main Authors: Zhang, Changhai, Yi, Guoqiang, Sun, Zaichun, Mei, Bingchu
Format: Article
Language:English
Subjects:
Broadband near-infrared emission
CaF2:Cr3
Ceramics
Luminescence
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Summary:•Non-rare earth ion doped (CaF2:Cr3+) fluoride transparent ceramic has been prepared.•The ceramics showed high transmittance with 83% at the wavelength of 1200 nm.•The ceramics showed effective broadband NIR emission with a FWHM of 130 nm. Cr3+ has attracted much attention as activator because of the merits such as, broadband near-infrared emission and tunable emission wavelength. However, the mixed valence of Cr3+ in some matrix materials greatly affected its luminescence. In this work, we synthesized Cr3+ doped CaF2(CaF2:Cr3+) precursor powders with a single valence of Cr3+ ion by coprecipitation and successfully prepared CaF2:Cr3+ transparent ceramics by vacuum hot-press sintering. The obtained ceramics showed high transmittance with 83% at 1200 nm and effective broadband near-infrared emission covering 680–980 nm with a full width at half-maximum (FWHM) of 130 nm. Moreover, the photoluminescence properties of ceramics were tuned by the concentration of Cr3+ ions.
ISSN:0167-577X
1873-4979
DOI:10.1016/j.matlet.2023.134506