High enhancement of green upconversion luminescence of Li+/Er3+/Yb3+ tri-doped CaMoO4

Concentration and pump power-mediated color tunability, optical heating and temperature sensing via TCLs of red emission in an Er3+/Yb3+/Li+ co-doped ZnGa2O4 phosphor

“…Nowadays, researchers are encouraged to produce efficient sources of Er 3+ /Yb 3+ co-doped phosphor materials by incorporating some additional ions, such as Li + , Mn 2+ , Mg 2+ , Zn 2+ , Ce 3+ , and Bi 3+ . 37–41 They are known as surface modifiers and are helpful in improving the UC emission intensity by modifying the local crystal structure. Out of these ions, the Li + ion has been widely incorporated in different combinations of Er 3+ /Yb 3+ co-doped phosphor materials.…”

Yb3+/Er3+ co-doped CaMoO4: a promising green upconversion phosphor for optical temperature sensing

“…It is known that, in the CaMoO 4 matrix, the CaAO bonds are shorter than the SrAO bonds in SrWO 4 , while the Mo 6+ ion exhibit smaller radius and thus stronger polarization than that of W 6+ [22], as a consequence, the CaMoO 4 host would endow the RE dopants with a more intense crystal field environment, and favor the luminescence and temperature sensitivity of Er 3+ ions. Upon such consideration, in this work, the Er 3+ /Yb 3+ :CaMoO 4 phosphor is synthesized, and its temperature dependent luminescent performance is investigated.…”

Recent Advances on Rare Earth Upconversion Nanomaterials for Combined Tumor Near-Infrared Photoimmunotherapy

“…When two PSs excited by different wavelengths were modified to UCNPs, not only the energy utilization rate would be improved, but also more ROS could be produced to enhance the therapeutic effect of tumor. On the other hand, it is also considerable to improve the quantum efficiency of UCNPs by improving the symmetry of crystal field, laser annealing, and doping concentration and surface interface to gain higher energy utilization rate (Tan et al, 2011 ; Chung et al, 2012 ).…”