[PHp2-3L] Improvement of Photoluminescent Characteristics by Post Annealing in O3 Atmosphere for Y4Si2O7N2:Eu3+ Phosphors
Ozone annealing, White LED phosphor, Y4Si2O7N2:Eu3+, Charge transfer state
A low-temperature post-annealing in O3 atmosphere has been attempted to enhance the Eu3+ activation for Y4Si2O7N2:Eu3+ red phosphor, which were prepared by the solid-state reaction in NH3. By the annealing, the photoluminescence excitation band due to the Eu3+ charge transfer state increases by about 40%, compared to the unannealed samples.