Morphology Manipulation and Upconversion Luminescence Enhancement of <i>β</i>-NaLuF<sub>4</sub>: Er<sup>3+</sup> Hexagonal Microtubes via Sr<sup>2+</sup> Doping

<div>Proposed upconversion mechanism under 980 nm laser excitation.</div>

Journal of Nanomaterials

fig8

Figure 8

Figure 8: Morphology Manipulation and Upconversion Luminescence Enhancement of <i>β</i>-NaLuF<sub>4</sub>: Er<sup>3+</sup> Hexagonal Microtubes via Sr<sup>2+</sup> Doping 

Journal of Nanomaterials

Morphology Manipulation and Upconversion Luminescence Enhancement of β-NaLuF4: Er3+ Hexagonal Microtubes via Sr2+ Doping

Figure 8

Morphology Manipulation and Upconversion Luminescence Enhancement of β-NaLuF₄: Er³⁺ Hexagonal Microtubes via Sr²⁺ Doping