Stress Activated- and Photo-Luminescence Properties in Eu-Doped (Sr, Ba)Al_2O_4 Phosphors Prepared by Solid State Reaction
藤原, 光二郎 ,
蔵元, 俊己 ,
横山, 宏有前田, 幸治
65 , 2015-07-31 , 宮崎大学工学部
Eu doped SrAl_2 O_4 and BaAl_2 O_4 were prepared by solid state reaction method added with H_3 BO_3 as a flux. We developed a new measuring equipment for Mechano-luminescence (ML) which was emitted by application of vibration stress generated by a piezo actuator.SrAl_2 O_4 emitted broad green light identified from Eu^<2+> in Photoluminescence (PL) and ML. The both intensities of luminescence from BaAl_2 O_4 showed weaker than that from SrAl_2 O_4 caused by the difference in the symmetry of each crystalline structure.