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<p>A green-emitting Tb<sup>3+</sup>-doped Ca<sub>2</sub>YNbO<sub>6</sub> double perovskite phosphor has been successfully synthesized by utilizing the solid-state method. The X-ray diffraction pattern shows the pure phase formation of double perovskite phosphors. An agglomerated and micron-sized morphology of the synthesized phosphors was determined by using scanning electron microscopy and a particle size analyzer. The distribution of the elemental compositions and presence of impurity dopant was confirmed by energy-dispersive spectroscopy. The photoluminescence spectra recorded using a 485&#xa0;nm excitation wavelength shows a prominent peak at 546&#xa0;nm. The properties of the luminescence for the synthesized phosphors have a true reliance on the cation substitution levels. The concentration quenching of the phosphors was found at 0.03&#xa0;mol%. The thermal stability analysis of the Tb³⁺-doped Ca₂YNbO₆ phosphors shows the higher activation energy of 0.57&#xa0;eV. The CIE coordinates and highly correlated color temperature of the sample showed that the synthesized phosphors are promising materials in the field of solid-state lighting.</p>

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Synthesis and photoluminescence properties of green light emitting Ca2YNbO6:Tb3+ double perovskite phosphors

  • 期刊论文

  • 发表日期：

    2025年7月2日

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  • Nisar Hussain,
  • Karan Kumar Gupta,
  • Chung-Hsin Lu

摘要

A green-emitting Tb3+-doped Ca2YNbO6 double perovskite phosphor has been successfully synthesized by utilizing the solid-state method. The X-ray diffraction pattern shows the pure phase formation of double perovskite phosphors. An agglomerated and micron-sized morphology of the synthesized phosphors was determined by using scanning electron microscopy and a particle size analyzer. The distribution of the elemental compositions and presence of impurity dopant was confirmed by energy-dispersive spectroscopy. The photoluminescence spectra recorded using a 485 nm excitation wavelength shows a prominent peak at 546 nm. The properties of the luminescence for the synthesized phosphors have a true reliance on the cation substitution levels. The concentration quenching of the phosphors was found at 0.03 mol%. The thermal stability analysis of the Tb³⁺-doped Ca₂YNbO₆ phosphors shows the higher activation energy of 0.57 eV. The CIE coordinates and highly correlated color temperature of the sample showed that the synthesized phosphors are promising materials in the field of solid-state lighting.