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Colloidal Tm3+/Yb3+-Doped LiYF4 Nanocrystals: Multiple Luminescence Spanning the UV to NIR Regions via Low-Energy Excitation

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Highly dispersible Tm3+/Yb3+-doped LiYF4 nanocrystals were synthesized using a thermal decomposition method. Upon excitation with a NIR diode laser (980 nm), the dilute dispersion of the nanocrystals exhibits several strong emissions in regions spanning the deep-UV to NIR, all originating from a single dopant/sensitizer (Tm3+/Yb3+) combination. The material is envisioned to have potential interests in anti-counterfeiting, biomedicine and solution-based scintillation applications.

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