Sub-30 nm lanthanide-doped KLu2F7 upconversion (UC) nanorods were synthesized using a hightemperature coprecipitation method. Highly uniform morphologies, a small size distribution and the desirable orthorhombic crystalline phase was achieved by controlling the
reaction temperature; while control over the UC luminescence color was achieved by changing the dopant activator. Orthorhombic KLu2F7 nanorods showed excellent potential as a host phase for future UC luminescence materials in applications such as bioimaging.
Highly sensitive optical temperature sensing based on pump-power-dependent upconversion luminescence in LiZnPO4:Yb3+–Er3+/Ho3+ phosphors