White-light long persistent and photo-stimulated luminescence in CaSnSiO5:Dy3+

Novel Self‐Activated Zinc Gallogermanate Phosphor: The Origin of its Photoluminescence

“…The plot of the lifetime components (s 1 and s 2 ) and intensities (I 1 and I 2 ) against the composition of the samples are illustrated in Fig. 24,25 As x increases, the s 1 of the samples slightly changes until x reaches 0.5, indicating that up to this point the substitution marginally alters the crystal lattice, however, when x is above 0.5, the crystal lattice changes considerably [ Fig. Generally, the short lifetime s 1 characterizes free-state annihilation for the perfect crystal lattice; the long lifetime s 2 is determined by bulk defects, including the cation deficiency, oxygen vacancy, twin boundary, dislocation and so on.…”

Long lasting phosphorescence properties and multi-peak fitting on thermoluminescence of red LaAlO3:Eu3+ phosphor

“…The fitting results are exhibited in Table 1 and they provide some important information on the traps and LLP processes: (1) (2) the kinetic order of the shallowest trap(E=0.7875 eV) is as large as 1.56, a rather high value, which suggests a very high importance of retrapping process. In other words, every carrier that escapes from a trap can probably be captured by another trap, resulting in extension of LLP time.…”

“…Long lasting phosphorescence(LLP) is an interesting optical phenomenon where a material excited by high energy radiation produces visible luminescent emission for an appreciable time at room temperature even after the irradiation light source has been removed [1,2] . LLP phosphors have attracted considerable attention for various display and sign application as environmental friendly and energy economized materials.…”

“…LLP phosphors have attracted considerable attention for various display and sign application as environmental friendly and energy economized materials. They have been widely used in emergency lighting, safety indication, road signs and so on [1,2] . Till now, a lot of blue and green LLP phosphors have been investigated.…”

White-blue long persistent luminescence in Ca2Ge7O16:Tb3+ via persistent energy transfer

“…[1] What makes it special is that the emission process can last for several minutes or hours after the stoppage of the excitation (typically ultraviolet (UV) light and visible light). Since the discovery of ZnS: Cu LPL in 1990s, [2] LPPs have emerged as security signs, emergency route signage, identification markers, or medical diagnostics.…”