International Display Workshops General Incorporated Association

[PHp2-3L] Improvement of Photoluminescent Characteristics by Post Annealing in O3 Atmosphere for Y4Si2O7N2:Eu3+ Phosphors

*Rentaro Furuie1、Takumi Nishitani1、Hiroki Shinoda1、Takashi Kunimoto2、Koutoku Ohmi1 (1.Tottori University (Japan)、2.Tokushima Bunri University (Japan))

Ozone annealing, White LED phosphor, Y4Si2O7N2:Eu3+, Charge transfer state

https://doi.org/10.36463/idw.2022.0419

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.