Lanthanide-doped photon upconversion nanoparticles
(UCNPs) are capable of converting low-intensity near-infrared light to UV and
visible emission through the synergistic effects of light excitation and mutual
interactions between doped ions. UCNPs have gained increasing attention for
their wide applications in optical bioimaging, displays and photovoltaics.
However, there are still some ongoing challenges for further developments. In
this talk, some strategies of optically controlling the optical properties of
UCNPs for extended applications will be introduced. The performance of imaging
employing UCNPs, e.g., imaging depth, imaging speed, quantum yield and
microscopic spatial resolution have be greatly improved for applications, such
as, tissue imaging and subcellular nanoscopic imaging.
