| 초록 |
Lanthanide-based upconverting nanomaterials has been used in various applications such as biomedical imaging, optical sensors, spectrum converters for photovoltaics, and phosphors for the displays. The host material plays an important role in upconverting the luminescence properties. Therefore, it is important to develop cheap and earth-rich materials to take advantage of the physical and chemical properties of lanthanide-based nanomaterials in large industrial sectors. calcium fluoride (CaF2) is a promising candidate for host materials since the usage of rare earth elements is substituted to a cheap and earth abundant calcium element. Here, we present size and shape-controlled synthesis of upconverting CaF2 nanocrystals doped with rare-earth elements. CaF2 nanocrystals are synthesized with morphology tunable from nanospheres, nanoplates, truncated octahedrals, and nanowires. We study the near-IR to visible two-photon upconversion of size and shape-controlled CaF2 nanocrystals doped with erbium (Er3+ ) and ytterbium (Yb3+ ) to tailor the luminescence properties. |
