Development of White Persistent Phosphors by Manipulating Lanthanide Ions in Gadolinium Gallium Garnets

Lanthanide ions act as excellent luminescence centers and good charge carrier traps. By selecting proper lanthanide ions, persistent phosphors with the desired luminescent color can be developed. In addition, an appropriate host material give not only better performance but also additional function. Herein, bright white of Pr3+–Tb3+–Eu3+ tridoped paramagnetic Gd3Ga5O12 (GGG) are successfully The GGG singly doped Pr3+, Tb3+, Eu3+ show reddish-white (3PJ–3HJ), blue (5DJ–7FJ), red (5D0–7FJ) photoluminescence, respectively, by UV excitation. On other hand, samples codoped Pr3+–Eu3+ Tb3+–Eu3+ Pr3+ Tb3+ luminescence, respectively. Based on thermoluminescence glow curves, it is found that ion acts electron trap in mechanism trapped electrons released at around 325 K. cool-white achieved combining GGG:Pr3+–Tb3+–Eu3+ phosphors. It demonstrated phosphor powder water dragged a permanent magnet due to property GGG.