Illuminating the invisible: high-efficiency near-infrared (NIR) emission in Yb³ + doped Y 2 O 3 nanophosphors for cutting-edge optical applications

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This study investigates the structural, morphological, and photoluminescent properties of Yb³+ doped Y2O3 phosphors synthesized via the solution combustion method. The structural analysis confirmed the cubic phase of Y2O3, with high crystallinity and successful incorporation of Yb³+ ions, as evidenced by X-ray diffraction (XRD). Scanning electron microscopy (SEM) revealed uniform morphology with nanoparticles averaging ∼50 nm. Photoluminescence (PL) studies highlighted strong near-infrared (NIR) emission at 980 nm, attributed to the 2F5/2 → 2F7/2 transition of Yb³+ under ultraviolet and visible excitation. The emission intensity exhibited a dependence on Yb³+ concentration, with a peak at 10 mol%, followed by quenching at higher concentrations. Energy transfer mechanisms, quantum yield, and the impact of host lattice properties on emission efficiency were analyzed in detail. The material demonstrates significant potential for enhancing the efficiency of silicon-based photovoltaic devices and for applications in bio-imaging due to its efficient NIR emission and compatibility with biological systems. This research establishes Yb³+ doped Y2O3 as a versatile phosphor for advanced optical applications.

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