Upconversion luminescence and Visible-Infrared Properties of β-NaLuF4:Er3+ Microcrystals Synthesized by the Surfactant-Assisted Hydrothermal Method
Figure 1
XRD patterns of the as-synthesized products obtained in the presence of different surfactants (EDTA: S1 to S3, PVP: S4 to S6, and Ct3−: S7 to S9). The standard pattern of hexagonal NaLuF4 (JCPDS card 27-0726) and orthorhombic LuF3 (JCPDS card 17-0796) is also presented for comparison.