Novel YBO3 Phosphors Doped with Ln3+ (Ce3+, Tb3+, Eu3+) Ions with Tunable Color for WLED Applications

In this work, YBO3 phosphors doped with Ln(3+) (Ce3+, Tb3+, Eu3+) ions were synthesized by a facile hydrothermal method using high temperature and high pressure environment. Structural property characterizations show all the samples have a similar spherical morphology and a hexagonal crystal structure with good crystallinity. PL spectra and CIE calculation show that the color of phosphors can be easily controlled by the species and atomic content of Ln(3+) ions. White color is achieved as the atomic contents of Ln(3+) ions are: 1% Ce3+, 3% Tb3+, and 0.5% Eu3+, respectively. Furthermore, LED devices based on ultraviolet chip were fabricated and characterized, and the results clearly demonstrated the tunable color of as-prepared phosphors. At the same time, co-doping Ce3+, Tb3+, and Eu3+ ions can well adjust the fluorescence lifetime of the three rare earth ions through energy transfer. These results show that the phosphor has broad application prospects in the field of display lighting such as LED. [GRAPHICS] .

Automated summary

In this study, YBO3 phosphors doped with Ln(3+) (Ce3+, Tb3+, Eu3+) ions were synthesized using a hydrothermal method. The phosphors exhibited good crystallinity and the color could be easily controlled. LED devices based on these phosphors showed tunable color, and co-doping of ions allowed for adjustment of fluorescence lifetime.