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Abstract <p>A Sr<sub>3</sub>SiO<sub>5</sub>:Ce<sup>3+</sup> phosphor was synthesized via a solid-state reaction and systematically characterized for its structural and optical properties. XRD analysis confirmed phase purity and tetragonal crystallinity, with slight peak shifts indicating successful Ce<sup>3+</sup> substitution at Sr<sup>2+</sup> sites, which also enhanced crystallinity and reduced defects. Diffuse reflectance spectra revealed an absorption edge at 275–300 nm, corresponding to a host band gap of 3.62 eV, suitable for UV excitation. Photoluminescence studies showed broad excitation (330–416 nm) and strong yellow-green emission centered at 530 nm due to Ce<sup>3+</sup> 5<i>d</i> → 4<i>f</i>&#xa0; transitions. The phosphor exhibited an average decay lifetime of 46.2 ns, CIE coordinates of (0.42, 0.39), and a color purity of ~67%, highlighting its potential as a warm-white light-emitting material for LED applications.</p>

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Investigation of Optical Characteristics in Sr3SiO5:Ce3+ Phosphor for High-Power White LEDs

  • 期刊论文

  • 发表日期：

    2026年2月1日

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  • Deepak Kumar Barla,
  • Rohit Kandulna,
  • Namita Singh,
  • Barkha Kachhap

摘要

Abstract

A Sr3SiO5:Ce3+ phosphor was synthesized via a solid-state reaction and systematically characterized for its structural and optical properties. XRD analysis confirmed phase purity and tetragonal crystallinity, with slight peak shifts indicating successful Ce3+ substitution at Sr2+ sites, which also enhanced crystallinity and reduced defects. Diffuse reflectance spectra revealed an absorption edge at 275–300 nm, corresponding to a host band gap of 3.62 eV, suitable for UV excitation. Photoluminescence studies showed broad excitation (330–416 nm) and strong yellow-green emission centered at 530 nm due to Ce3+ 5d → 4f  transitions. The phosphor exhibited an average decay lifetime of 46.2 ns, CIE coordinates of (0.42, 0.39), and a color purity of ~67%, highlighting its potential as a warm-white light-emitting material for LED applications.