Novel Sm 3+ doped YCa 4 O(BO 3 ) 3 phosphors: Structural and, low and room temperature luminescent insights.

Inorganic phosphors, known for their ability to capture energy from various sources and emit visible light, have become essential in the development of advanced lighting and display technologies. This study explores YCa ₄ O(BO ₃ ) ₃ (YCOB) as a potential host material for phosphors, focusing on the luminescent properties of YCOB phosphors doped with Sm ³⁺ ions. The successful integration of Sm ³⁺ ions into the YCOB host lattice is confirmed through structural characterization using X-ray diffraction (XRD), Fourier-Transform Infrared Spectroscopy (FTIR), and Energy-Dispersive X-ray Spectroscopy (EDS). Photoluminescence (PL) studies reveal distinct emission spectra with Stark energy level splitting, indicating a cooperative effect between Y ³⁺ and Sm ³⁺ ions. Concentration quenching, mainly attributed to dipole-dipole (d-q) interactions, is observed at higher Sm ³⁺ concentrations. Temperature-dependent PL measurements demonstrate thermal quenching at lower temperatures and increased emission intensity with higher laser power. Thermal quenching is explained by reduced lattice vibrations and electron-phonon interactions, leading to decreased radiative recombination of charge carriers. The CIE chromaticity data position the samples in the orange-red region, emitting vibrant orange-red light. This comprehensive investigation provides insights into the synthesis and luminescent properties of YCOB:Sm ³⁺ phosphors, highlighting their potential applications in luminescent devices.
Competing Interests: Declaration of competing interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.
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