High temperature photoluminescence dependence and energy migration of Tb-Incorporated KY(BO) phosphors.

This study investigates the structural and photoluminescence (PL) characteristics of Tb-incorporated KY(BO) (KYBO) phosphors synthesized via a microwave-assisted sol-gel technique. X-ray diffraction (XRD) and Rietveld refinement confirmed the formation of a pure hexagonal phase, with lattice expansion due to Tb³⁺ doping. PL studies revealed strong green emissions centered at 541 nm, attributed to the ⁵D₄ → ⁷F₅ transitions of Tb³⁺ ions, with the highest intensity observed at 5 wt% Tb³⁺.

Enhanced luminescence of Eu in LaAlBO via energy transfer from Dy doping.

In this study, an investigation was conducted on the structural and photoluminescence (PL) characteristics of LaAlBO (LAB) phosphors initially incorporated with Dy and Eu ions. Subsequently, the impact of varying Eu concentration while maintaining a constant Dy concentration was examined. Structural characterization was performed using X-ray diffraction (XRD), Fourier-transform infrared spectroscopy (FTIR), and energy-dispersive X-ray spectroscopy (EDS).

Novel Tb³⁺-Doped LaAl₂B₄O₁₀ phosphors: Structural analysis, luminescent properties, and energy transfer mechanism.

This study explores the structural and luminescent properties of terbium (Tb³⁺)-doped lanthanum aluminium borate (LaAl₂B₄O₁₀, abbreviated as LAB) phosphors, a novel host lattice for Tb³⁺ doping. LAB:Tb³⁺ phosphors, with varying dopant concentrations, were synthesized using a microwave-assisted combustion synthesis approach and characterized using X-ray diffraction (XRD), Rietveld refinement, and photoluminescence spectroscopy at both room and low temperatures. The structural analysis confirmed the hexagonal crystal structure of LAB and revealed successful incorporation of Tb³⁺ ions without altering the fundamental lattice.

Temperature-dependent photoluminescence of novel Eu, Tb, and Dy doped LaCaO(BO): Insights at low and room temperatures.

This study explores the structural and optical qualities of LaCaO(BO) (LACOB) phosphors doped with Eu, Dy, and Tb using a microwave-assisted sol-gel technique. It uncovers oxygen-related luminescence defects in LACOB, highlighting emission peaks at 489 and 585 nm for Dy, a distinct sharp peak at 611 nm for Eu in the red spectrum, and a notable green emission for Tb due to specific transitions. The photoluminescence (PL) analysis indicates that luminescence is optimized through precise doping, leveraging dipole interactions, and localized resonant energy transfer, which are influenced by dopant concentration and spatial configuration.

Beta irradiation-induced thermoluminescence: Glow curve analysis and kinetic parameters in combustion-synthesized undoped CaYO(BO).

This study examines the thermoluminescent (TL) properties of undoped CaYO(BO) phosphor, focusing on how it behaves under a variety of experimental conditions. The IRSL-TL 565 nm was chosen as the appropriate detection filter among various optical detection filter combinations. During the preheating trials conducted at a rate of 2 °C/s, the TL peak exhibited increased intensity, particularly around 200 °C.