Vacuum referred binding energy of 3d transition metal ions for persistent and photostimulated luminescence phosphors of cerium-doped garnets

The Y₃Al_5−xGa_xO₁₂(YAGG):Ce³⁺-Cr³⁺ persistent phosphor is one of the materials in which Cr³⁺ ions act as electron traps. The possibility of electron traps by other transition metal ions (TM³⁺, TM = Sc, Ti, V, Cr, Fe) was investigated and those electron trap...

Thermal ionization and thermally activated crossover quenching processes for 5d-4f luminescence in Y3 A l5-x G ax O12: P r3+

We investigated thermally activated ionization and thermally activated crossover as the two possibilities of quenching of 5d luminescence in Pr3+-doped Y3Al5-xGaxO12. Varying the Ga content x gives the control over the relative energy level location of the 5d and 4f2:PJ3 states of Pr3+ and the host conduction band (CB). Temperature-dependent...

The role of Ln³⁺ (Ln = Eu, Yb) in persistent red luminescence in MgGeO₃:Mn²⁺

In this paper, Mn2+ and Ln3+ (Ln = Eu, Yb) co-doped MgGeO3 phosphors were prepared using a solid state reaction technique, and their optical properties were investigated. Mn2+-doped samples exhibit persistent luminescence in the red region, peaking at 677 nm, because of the 4T1 → 6A1 transition of the Mn2+ ions under ultraviolet (UV) excitation....

Hole Detrapping-Type Persistent Phosphors of RE₂O₂S (RE = La, Gd, Y, Lu) Doped with Eu³⁺-Pr³⁺ and Eu³⁺-Tb³⁺

RE₂O₂S:Eu³⁺-Ln³⁺ (RE = La, Gd, Y, Lu; Ln = Pr, Tb) samples were prepared by a solid-state reaction method to develop new red persistent phosphors and to demonstrate the hole detrapping mechanism. All Eu³⁺-singly doped RE₂O₂S show very weak thermoluminescence (TL)...