Abstract
Highly crystalline Eu3+ doped yttria nanoparticles were synthesized by hydrothermal reaction in supercritical water using a continuous flow reaction system. The XRD results revealed that the crystal phase of as-prepared particles was YOOH and converted to cubic-phase Y2O3 after annealing above 550C. Primarily particle size of the YOOH was as small as less than 50 nm. The as-prepared particles exhibited red emission without annealing at high temperatures, whereas photoluminescent intensity at 612 nm was increased with an increase in the annealing temperature.
