Cationic Effects on Photo- and X-ray Radioluminescence of K₃RE(PO₄)₂:Ce³⁺/Pr³⁺ (RE = La, Gd, and Y) Phosphors toward X-ray Detection

Cationic tuning for lanthanide (Ce³⁺/Pr³⁺)-activated inorganic phosphors with stable, efficient, and fast-decay 5d-4f emissions has emerged as an important strategy toward the continuing pursuit of superior scintillators. The in-depth understanding of the cationic effects on photo- and radioluminescence of lanthanides Ce...

Site Occupancies, VUV-UV-vis Photoluminescence, and X-ray Radioluminescence of Eu²⁺-Doped RbBaPO₄

RbBaPO4:Eu2+ phosphors have been prepared by a high-temperature solid-state reaction method, and the structure was determined by Rietveld refinement based on powder X-ray diffraction (P-XRD) data. Their VUV-UV-vis photoluminescence properties are systematically investigated with three objectives: (1) based on low-temperature spectra, we...

Impacts of 5d electron binding energy and electron-phonon coupling on luminescence of Ce ³⁺ in Li ₆ Y(BO ₃ ) ₃

In this work, the crystal structure and electronic structure as well as the synchrotron radiation vacuum ultraviolet-ultraviolet-visible (VUV-UV-vis) luminescence properties of Li ₆ Y(BO ₃ ) ₃ (LYBO):Ce ³⁺ phosphors were investigated in detail. The Rietveld refinement and DFT calculation reveal the...

How to predict the location of the defect levels induced by 3d transition metal ions at octahedral sites of aluminate phosphors

How the 3d transition metal (TM) ions induce defect levels in wide band gap compounds and how these defect levels evolve from compound to compound is very important in understanding and predicting the luminescent properties of TM activated phosphors. This issue is discussed by studying the ground state 3dⁿ level locations of the TM...

Insight into Eu redox and Pr³⁺ 5d emission in KSrPO₄ by VRBE scheme construction

A series of Ln-doped KSrPO₄ (Ln = Ce³⁺, Eu³⁺, Eu²⁺, Pr³⁺) phosphors are prepared through a high-temperature solid-state method. The KSrPO₄ compound is confirmed to possess a β-K₂SO₄ structure with the Pnma group by Rietveld refinement, and the temperature...