Energy transfer and thermal regression mechanism of color-tunable phosphor Sr8La2(PO4)3.5(SiO4)2(BO4)0.5BO2: Ce3+, Tb3+

Tricolor- and White Light–Emitting Ce3+/Tb3+/Mn2+-Coactivated Li2Ca4Si4O13 Phosphor via Energy Transfer

“…The lifetimes can be defined in equation τ D = ∫ 0 ∞ I D ( t )­d t , where I D ( t ) is the decay function of donors in the absence of acceptors, which have normalized to its initial intensity. The Ce 3+ –Tb 3+ ET features are reflected by the fluorescence intensities, which decrease with increasing Tb 3+ concentrations. − The efficiency of Ce 3+ –Tb 3+ ET is calculated with the formula where τ 0 and τ are the decay lifetimes of the sensitizer Ce 3+ in the absence and presence of activator Tb 3+ , respectively. The calculated value is illustrated in Figure , which will increase monotonously with the y values until the highest 45% corresponding to a y value of 0.12.…”

Temperature sensing of Sr3Y2Ge3O12:Bi3+,Sm3+ garnet phosphors with tunable sensitivity

“…5,6 The phosphors with RE → TM dopants such as Bi 3+ → Eu 3+ , Er 3+ → Yb 4+ , Eu 2+ → Cr 3+ , Dy 3+ → Eu 3+ , and Ce 3+ → Tb 3+ have been reported. 6–10…”

“…5,6 The phosphors with RE → TM dopants such as Bi 3+ → Eu 3+ , Er 3+ → Yb 4+ , Eu 2+ → Cr 3+ , Dy 3+ → Eu 3+ , and Ce 3+ → Tb 3+ have been reported. [6][7][8][9][10] Sm 3+ ions are classical orange-red emission activators [11][12][13] and Bi 3+ usually shows a significant broad emission band due to 3 P 1 → 1 S 0 transitions, and they are a popular combination used for temperature sensing. [14][15][16] Most of the reports usually investigated the ion interaction, energy transfer, and temperature sensing properties of phosphors only around the optimal concentration.…”