Enabling narrowband cyan photoluminescence and long-lasting ultraviolet-A persistent luminescence in Bi³⁺ single-doped Sr₃Sc₂Ge₃O₁₂ phosphors by selective site occupation

Abstract

Trivalent bismuth (Bi3+) has been regarded as a favorable emitting center since it can give off light of different wavelengths from ultraviolet (UV) to red in different host materials. These...

High charge carrier storage capacity and wide range X-rays to infrared photon sensing in LiLuGeO4:Bi3+,Ln3+ (Ln = Pr, Tb, or Dy) for anti-counterfeiting and information storage applications

“…34,35 Compared with afterglow phosphors with emission in the visible spectral range, the UVA afterglow phosphors have rarely been reported. [36][37][38] Therefore, it is interesting to develop a white afterglow phosphor together with the UVA afterglow for anti-counterfeiting applications. ARE(Si, Ge)O 4 (A = Li or La; RE = Y or Lu) family compounds are interesting compounds for studying the luminescence mechanism.…”

“…34,35 Compared with afterglow phosphors with emission in the visible spectral range, the UVA afterglow phosphors have rarely been reported. 36–38 Therefore, it is interesting to develop a white afterglow phosphor together with the UVA afterglow for anti-counterfeiting applications.…”

Abnormal upconversion luminescence induced by defects and Er3+–Yb3+ distance change in Cs3GdGe3O9:Er3+/Yb3+ phosphors

“…Miao et al. studied long afterglow properties by using Sr 3 Sc 2 Ge 3 O 12 host defects with doping Bi 3+ 26 . The defects of germanate host are caused by the easy volatilization of germanium ions during the high‐temperature synthesis.…”

“…Recently, Dang et al reported that Cs 3 GdGe 3 O 9 (CGG) is a negative expansion material from 298 to 523 K. 25 Miao et al studied long afterglow properties by using Sr 3 Sc 2 Ge 3 O 12 host defects with doping Bi 3+ . 26 The defects of germanate host are caused by the easy volatilization of germanium ions during the high-temperature synthesis. In addition, germanate also has a relatively suitable phonon vibration energy; the highest is ∼800 cm −1 , which is conducive to upconversion phonon-assisted transitions to overcome thermal quenching.…”

A metal-to-metal charge transfer induced green-yellow phosphor CsAlGe2O6:Bi3+ for full-spectrum LED devices

“…In the development process of Bi 3+ doped materials, silicates, germanates and other matrix materials can make Bi 3+ phosphors have strong and controllable full-spectrum emission due to their excellent coordination environments and appropriate crystal field strength, 30 such as CdSiO 3 , ALnGeO 4 (A = Na, Li; Ln = Lu, Sc), and Y 3 (Ga, Al) 5 O 12 . [31][32][33][34][35][36] Among them, germanates attract extensive attention as phosphors for fullspectrum LED lighting because of their suitable Bi 3+ accommodation and structural diversity.…”