Research Article
Upconversion luminescence and Visible-Infrared Properties of β-NaLuF4:Er3+ Microcrystals Synthesized by the Surfactant-Assisted Hydrothermal Method
Table 1
Summary of morphologies and their corresponding detailed experimental conditions of samplesa.
| Sample | Agents | Agents/Recl3 molar ratio | Phase | Morphology | Mean size (m) | Graph |
| S1 | EDTA | 1 : 1 | Hexagonal | Hexagonal prisms | L: 9 | Figure 2(a) | S2 | EDTA | 2 : 1 | Hexagonal | Hexagonal prisms | L: 3.5 | Figure 2(b) | S3 | EDTA | 3 : 1 | Hexagonal | Hexagonal prisms | L: 1 | Figure 2(c) | S4 | PVP | 1 : 1 | Hexagonal | Tubes with cracks | H: 10 | Figure 2(d) | S5 | PVP | 2 : 1 | Hexagonal | Tubes with cracks | H: 5 | Figure 2(e) | S6 | PVP | 3 : 1 | Hexagonal | Irregular hexagonal tubes | H: 1.5 | Figure 2(f) | S7 | Ct3− | 1 : 1 | Orthorhombic (LuF3) | Spheres | D: 3.5 | Figure 2(g) | S8 | Ct3− | 2 : 1 | Hexagonal | Spheres with coarse surface | D: 2 | Figure 2(h) | S9 | Ct3− | 3 : 1 | Hexagonal | Perfect disks | D: 1.5 | Figure 2(i) |
|
|
D: diameter; H: height; L: side length.
aAll samples were hydrothermally treated at 190°C for 24 h.
|