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Nanocrystalline NaGd1–xNdxF4 (x = 0–1)phosphors have been synthesized by hydrothermal synthesis for the first time. All synthesized compounds have hexagonal β-NaYF4 crystalline phase. Neodymium(III) ions isomorphically replace gadolinium ions. NaGd0.96Nd0.04F4 compound has the largest photoemission intensity in NIR range upon 808-nm excitation; further doping with Nd3+ results in concentration quenching. [ABSTRACT FROM AUTHOR]

Microcrystalline phosphors NaY0.8–xYb0.2HoxF4 (x = 0–0.1) were first synthesized by the hydrothermal method. All synthesized compounds have hexagonal β-NaYF4 crystalline phase. It has been found that holmium(III) ions isomorphically replace yttrium ions. The maximum intensity of up-conversion emission in the visible region of the spectrum upon 973-nm excitation is observed for the compound NaY0.78Yb0.2Ho0.02F4. [ABSTRACT FROM AUTHOR]

The nanocrystalline phosphor NaGd0.7Eu0.3F4 with the most intensive luminescence among NaGd1–xEuxF4 (x = 0–1) compounds was obtained by hydrothermal synthesis. The unit cell parameters and nanoparticle size were determined. The cytotoxicity, luminescent, and magnetic properties were characterized. [ABSTRACT FROM AUTHOR]

New microcrystalline phosphors NaY1–xTbxF4 (x = 0–0.6) were obtained by the hydrothermal synthesis. All compounds have the hexagonal β-NaYF4 crystalline phase. Terbium(III) ions isomorphically replace yttrium ions, which results in increasing the unit cell parameters and decreasing the particle size. The maximum luminescence intensity is observed for the NaY0.6Tb0.4F4 compound. [ABSTRACT FROM AUTHOR]

The nanocrystalline phosphor NaGd0.7Eu0.3F4 with the most intensive luminescence among NaGd1–xEuxF4 (x = 0–1) compounds was obtained by hydrothermal synthesis. The unit cell parameters and nanoparticle size were determined. The cytotoxicity, luminescent, and magnetic properties were characterized. [ABSTRACT FROM AUTHOR]