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A set of orange-red emitting Phosphor-in-Glass (PiG) samples based on Sm3+ activated SrTi(PO4)2 phosphor (STP Sm) with varying phosphor content (x = 3, 5, 7, and 9 wt%) were fabricated via a one-step melt-quenching method. Structural studies, including HR-TEM, SAED, and FTIR, confirmed the successful integration of polycrystalline phosphor powder into the amorphous glass matrix. The optical and luminescent characteristics of the prepared PiGs were analysed using UV-Visible transmittance and photoluminescence spectra. PL emission spectra revealed intense emission for all PiGs under 401 nm excitation, with a prominent emission peak at 595 nm corresponding to the 4G₅/₂ to 6H₇/₂ transition of Sm3+ ions. Chromaticity studies demonstrated that the prepared samples exhibited colour coordinates of (0.571, 0.422), resulting in orange-red emission with a colour purity of 98.2%. These results highlighted the STP Sm PiGs as promising inorganic colour converters for lighting and display applications.

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Sm3+ Activated Phosphor-in-Glass: A Novel Orange-Red Emitter for Inorganic Colour Conversion in LEDs

  • 会议论文

  • 发表日期：

    2025年

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  • Jeena Rose Jose,
  • M. S. Amogh,
  • Ashika J. Ashok,
  • Gin Jose,
  • P. R. Biju

摘要

A set of orange-red emitting Phosphor-in-Glass (PiG) samples based on Sm3+ activated SrTi(PO4)2 phosphor (STP Sm) with varying phosphor content (x = 3, 5, 7, and 9 wt%) were fabricated via a one-step melt-quenching method. Structural studies, including HR-TEM, SAED, and FTIR, confirmed the successful integration of polycrystalline phosphor powder into the amorphous glass matrix. The optical and luminescent characteristics of the prepared PiGs were analysed using UV-Visible transmittance and photoluminescence spectra. PL emission spectra revealed intense emission for all PiGs under 401 nm excitation, with a prominent emission peak at 595 nm corresponding to the 4G₅/₂ to 6H₇/₂ transition of Sm3+ ions. Chromaticity studies demonstrated that the prepared samples exhibited colour coordinates of (0.571, 0.422), resulting in orange-red emission with a colour purity of 98.2%. These results highlighted the STP Sm PiGs as promising inorganic colour converters for lighting and display applications.