Novel yellow color-emitting BaY2O4:Dy3+ phosphors: persistent luminescence from blue to red
Source abstract
Abstract
BaY2O4:Dy3+ phosphors were synthesized using the solid-state method. X-ray diffraction, photoluminescence, persistent luminescence, and thermoluminescence spectra were employed to characterize the phosphors. The powder X-ray diffraction pattern confirms its orthorhombic structure. Photoluminescence emission and excitation spectra were investigated as a function of Dy3+ ion concentration. The photoluminescence excitation spectra revealed that the Dy3+ excitation band has a main excitation center located at 351 nm. The photoluminescence spectra exhibit an intense yellow emission due to a strong 4F9/2 → 6H13/2 transition at 578 nm, a weak 4F9/2 → 6H15/2 transition at 488 nm, and a feeble 4F9/2 → 6H11/2 transition at 670 nm. According to the characteristic emission (4F9/2 → 6H13/2), the concentration of Dy3+ ions was optimized to 1 mol%. The trap depths were examined by the thermoluminescence glow curves. In addition, in the process of exploring the persistent luminescence and thermoluminescence mechanism of BaY2O4:Dy3+ phosphors, doped Dy3+ was found to form defects and act as charge carrier traps, resulting in persistent luminescence.
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Research context
OpenAlex topics: Luminescence Properties of Advanced Materials · Luminescence and Fluorescent Materials · Glass properties and applications
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (33)
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