Luminescence properties of Tb3+-doped borosilicate scintillating glass under UV excitation

Constructing Concentration and Temperature Controllable Blue-Green Emission in a Single-Component Solid-State Phosphor

“…43−45 Weak emissions of Tb 3+ in the blue zone (320−480 nm) were reported at 382, 414, 437, and 459 nm for the 5 D 3 → 7 F J transitions of J = 6, 5, 4, 3, respectively, in some Tb 3+ fine spectra study. 40,42 However, due to the strong overlap of the PL spectra of the host luminescence at low terbium concentrations, we did not observe the weak blue emissions of Tb 3+ .…”

“…Figure a presents the PL spectra of Y 2– x Tb x CaGe 4 O 12 at room temperature using a 320 nm UV excitation where not only the host lattice excitons but also the 4f → 5d transition of Tb 3+ could be excited. − The broad peak emission in the range of 340–470 nm was ascribed to be the host lattice emission; the emissions over 470–700 nm belong to 4f–4f transitions of Tb 3+ where the peaks at 490, 545, 590, and 621 nm were attributed to the 5 D 4 → 7 F J ( J = 6, 5, 4, 3) transitions of Tb 3+ , respectively. − Weak emissions of Tb 3+ in the blue zone (320–480 nm) were reported at 382, 414, 437, and 459 nm for the 5 D 3 → 7 F J transitions of J = 6, 5, 4, 3, respectively, in some Tb 3+ fine spectra study. , However, due to the strong overlap of the PL spectra of the host luminescence at low terbium concentrations, we did not observe the weak blue emissions of Tb 3+ .…”