Study of a color-tunable long afterglow phosphor Gd_1.5Y_1.5Ga₃Al₂O₁₂:Tb³⁺: luminescence properties and mechanism

Abstract

Long afterglow phosphors play a significant role in practical applications.

Modulating Mn self-reduction and multimodal luminescence in CaSb2O6 through La3+ doping for quadruple-mode dynamic anti-counterfeiting and optical temperature sensing applications

“…These improvements can be attributed to the appropriate increase in the concentration of deep traps in the samples after doping with 0.01La 3+ , given that an increase in the concentration of deep traps in the samples results in a longer decay time of the afterglows of the samples, as well as an increase in the information-storage capacity of the samples. 54,55…”

“…These improvements can be attributed to the appropriate increase in the concentration of deep traps in the samples after doping with 0.01La 3+ , given that an increase in the concentration of deep traps in the samples results in a longer decay time of the afterglows of the samples, as well as an increase in the information-storage capacity of the samples. 54,55 However, as the La 3+ co-doping concentration gradually increased, the TL intensity of CSO:0.01Mn,xLa 3+ decreased. The TL intensity reached its maximum value when the La 3+ ion concentration was 0.01.…”

Synergistic effects of Tb doping in long-persistent luminescence in Ca3Ga4O9: xBi3+, yZn2+ phosphors: Implications for novel phosphorescent materials

“…Conversely, as the ionizing potential of a dopant cation decreases, its ability to delocalize electron density to stabilize an empty anion vacancy increases. Therefore, it is anticipated that Tb exhibits a stronger propensity to attract an anion vacancy (oxygen defect cluster) compared to Bi3+ [ 38 , 39 ]. Consequently, it is expected the formation of defect clusters in the proximity of the Tb sites.…”

Synthesis and photoluminescence properties of a novel green‐emitting LiYGeO4:Tb3+ long afterglow phosphor

“…As the doping concentration was increased, there was a small angle shift of the main peak that is shown in the enlarged plot on the right side of Figure 1(a); this indicates that the doping of Tb 3+ replaced the position of Y 3+ and led to the distortion of the crystal structure. [ 21,22 ] According to Bragg’s formula [ 23 ] : when is fixed, the surface spacing is inversely proportional to . As the Tb 3+ radius (0.0923 nm, CN = 6) is larger than the Y 3+ radius (0.0900 nm, CN = 6), the cell volume increases, and the diffraction peak position is shifted to a small angle at 33.2118°.…”

“…As the doping concentration was increased, there was a small angle shift of the main peak that is shown in the enlarged plot on the right side of Figure 1(a); this indicates that the doping of Tb 3+ replaced the position of Y 3+ and led to the distortion of the crystal structure. [21,22] According to Bragg's formula [23] :…”