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<p>LiCa<sub>4(1-x)</sub>(BO<sub>3</sub>)<sub>3</sub>:xSm<sup>3+</sup> phosphors were successfully synthesized and systematically investigated for their luminescence characteristics and potential applications in advanced photonic devices. Structural confirmation through X-ray diffraction (XRD) verified the crystalline phase consistency with the Takedaite- type reference, while Fourier-Transform Infrared Spectroscopy (FTIR) revealed characteristic BO<sub>3</sub> vibrational modes, confirming the host lattice integrity. Photoluminescence(PL) measurements demonstrated strong orange-red emission arising from the characteristics <sup>4</sup>G<sub>5/2</sub> → <sup>6</sup>H<sub>7/2</sub> and <sup>4</sup>G<sub>5/2</sub> → <sup>6</sup>H<sub>9/2</sub> transitions of Sm<sup>3+</sup> ions under near-UV excitation. Concentration dependent studies revealed an optimal doping concentration (5&#xa0;mol%) beyond which concentration quenching occurred due to multipolar interactions. Chromaticity co-ordinate analysis indicated that the phosphors emit in the orange-red region. The LiCa<sub>4(1-x)</sub>(BO<sub>3</sub>)<sub>3</sub>:xSm<sup>3+</sup> phosphor exhibits enhanced red emission with relative luminous efficacy of 445 lmW<sup>−1</sup>, representing a 3.2% improvement over commercial Y<sub>2</sub>O<sub>3</sub>:Sm<sup>3+</sup> phosphor. The decay analysis reveals a lifetime of 0.7&#xa0;ms, indicating a faster response suitable for high frequency excitation. The findings highlight the novelty of LiCa<sub>4</sub>(BO<sub>3</sub>)<sub>3</sub> as a chemically stable host matrix, offering tunable emission properties, high thermal stability and promising quantum efficiency, establishing its potential for integration into photonic and optoelectronic devices.</p>

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Luminescence characteristics and analytical evaluation of LiCa4(BO3)3: xSm3+ phosphors for advanced photonic applications

  • 期刊论文

  • 发表日期：

    2026年6月26日

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  • S. S. Rajankar,
  • S. P. Hargunani

摘要

LiCa4(1-x)(BO3)3:xSm3+ phosphors were successfully synthesized and systematically investigated for their luminescence characteristics and potential applications in advanced photonic devices. Structural confirmation through X-ray diffraction (XRD) verified the crystalline phase consistency with the Takedaite- type reference, while Fourier-Transform Infrared Spectroscopy (FTIR) revealed characteristic BO3 vibrational modes, confirming the host lattice integrity. Photoluminescence(PL) measurements demonstrated strong orange-red emission arising from the characteristics 4G5/2 → 6H7/2 and 4G5/2 → 6H9/2 transitions of Sm3+ ions under near-UV excitation. Concentration dependent studies revealed an optimal doping concentration (5 mol%) beyond which concentration quenching occurred due to multipolar interactions. Chromaticity co-ordinate analysis indicated that the phosphors emit in the orange-red region. The LiCa4(1-x)(BO3)3:xSm3+ phosphor exhibits enhanced red emission with relative luminous efficacy of 445 lmW−1, representing a 3.2% improvement over commercial Y2O3:Sm3+ phosphor. The decay analysis reveals a lifetime of 0.7 ms, indicating a faster response suitable for high frequency excitation. The findings highlight the novelty of LiCa4(BO3)3 as a chemically stable host matrix, offering tunable emission properties, high thermal stability and promising quantum efficiency, establishing its potential for integration into photonic and optoelectronic devices.