| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 1314631 | Journal of Fluorine Chemistry | 2012 | 6 Pages |
Tm3+ ion doped α-NaYbF4 nanocrystals (NCs) and β-NaYbF4 microcrystals (MCs) were prepared by one-step hydrothermal method through tuning pH values. Through the comparative study on the crystal growth mechanism guided by two different organic additives, the effect of Na+ cation on morphologies was discussed. Under 980-nm excitation, intense ultraviolet (UV) and blue upconversion (UC) emissions were observed from both of them. The UC luminescence properties of the as-prepared MCs were studied based on changing the Tm3+ ion concentrations. The fluorescent lifetimes of MCs doped with different amount of Tm3+ ions indicate that the obtained NaYbF4:Tm3+ MC was an excellent matrix for UV UC emissions.
Graphical abstractTm3+ ion doped α-NaYbF4 nanocrystals (NCs) and β-NaYbF4 microcrystals (MCs) were prepared by one-step hydrothermal method through tuning pH values. Through the comparative study on the crystal growth mechanism guided by two different organic additives, the effect of Na+ cation on morphologies was discussed. Under 980-nm excitation, intense ultraviolet (UV) and blue upconversion (UC) emissions were observed from both of them. The UC luminescence properties of the as-prepared MCs were studied based on changing the Tm3+ ion concentrations. The fluorescent lifetimes of MCs doped with different amount of Tm3+ ions indicate that the obtained NaYbF4:Tm3+ MC was an excellent matrix for UV UC emissions.Figure optionsDownload full-size imageDownload as PowerPoint slideHighlights► Tm3+ doped NaYbF4 crystals emitted intense UV UC and weak visible UC emissions. ► The affect of Na+ cation on the morphologies was discussed. ► The appropriate Tm3+ concentration for the strongest UV UC emissions was found.
