[15p-P10-1~21] 13.9 Optical properties and light-emitting devices

[15p-P10-10] Energy Transfer Processes in YVO₄:Bi, Ln(Ln=Sm,Eu,Dy,Er) Phosphor

Takuma Ikarashi¹, Kunio Yubuta², Toetsu Shishido², Naotaka Uchitomi¹, 〇Ariyuki Kato¹ (1.Nagaoka Univ. of Tech., 2.Inst. Mater. Res., Tohoku Univ.)

Keywords:Co-doping, Energy Transfer

In order to investigate the energy transfer process between Bi and Ln systematically, YVO₄:Bi, Ln (Ln = Sm, Eu, Dy, Er) phosphor with various concentrations were prepared by citrate complex polymerized complex method and their PL spectra were compared. The dependence of calculated energy transfer rate on average distance between Bi and Ln ions indicated similar decrease tendency of the energy transfer rate for all Ln ions with increase of the average distance, and the energy transfer rate increases in order of Er > Sm ≈ Eu > Dy.