A novel phosphor CaZnGe2O6:Bi3+ with persistent luminescence and photo-stimulated luminescence

Fig. 1(a) PSL decay curves of CaZnGe2O6: 0.5%Bi3+ sample under the different excitation wavelengths. (b) Persistent duration of CaZnGe2O6: 0.5%Bi3+. The inset is the photographs of CaZnGe2O6: 0.5%Bi3 + phosphor with and without the UV irradiation at 254 nm light. The dotted line represent the signal to noise ratio from the detector.