Rare Earth-Doped Nanophosphors: Synthesis and Optical Characteristics

Author(s): Shreshth Bhonsle, Mohammad Ziyauddin Khan and Jai Narayan Sahu

Abstract:

Rare earth-doped nanophosphors have emerged as promising luminescent materials for various optoelectronic, biomedical, and display applications due to their excellent optical properties, high quantum efficiency, and tunable emission spectra. In this study, we report the synthesis and characterization of rare earth-doped nanophosphors using a sol-gel combustion method. The synthesized nanophosphors were doped with lanthanide ions such as Eu³⁺, Tb³⁺, and Dy³⁺ to achieve red, green, and blue emissions, respectively. Structural analysis using X-ray diffraction (XRD) confirmed the crystalline phase of the materials, while transmission electron microscopy (TEM) revealed the nanoscale morphology. Photoluminescence (PL) spectroscopy demonstrated strong emission intensities with narrow bandwidths, making them suitable for display and bioimaging applications. The optical properties were further analyzed using UV-visible spectroscopy, confirming efficient absorption and energy transfer processes. Additionally, temperature-dependent luminescence studies indicated the stability of these nanophosphors under varying environmental conditions. The synthesized rare earth-doped nanophosphors exhibit excellent optical performance, making them ideal candidates for applications in solid-state lighting, security markers, and biological labeling. This study provides insights into the controlled synthesis of nanophosphors with tunable emission properties and high photostability.

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