[15p-P11-1~14] 13.8 Optical properties and light-emitting devices

[15p-P11-10] Analysis of ESR Spectrum Fine Structure of Long-Persistent Red Phosphor Ca₂Si₅N₈ doped with Eu and Tm

〇Hayato Miyagawa¹, Yusuke Yasuda¹, Takeru Takahashi¹, Yoshiaki Kamigaki², Yoriko Suda³ (1.Kagawa Univ., 2.EBL, 3.Tokyo Univ. of Tech.)

Keywords:

long-persistent phosphor,Ca2Si5N8,Electron Spin Resonance

We carried out ESR measurements on long-persistent red phosphor material, Ca2Si5N8 doped with Eu and Tm. The ESR spectra were analysed and found to be originated from both point defects in matrix and the nuclear moment of Eu. We performed fitting analysis for the fine structre and found that the behaviors of the nuclear signal and matrix defects shows different dependency aginst applied power and doping elements concentration.