Synthesis and photoluminescence properties of green light emitting Ca2YNbO6:Tb3+ double perovskite phosphors
Journal
Journal of Optics (India)
ISSN
0972-8821
0974-6900
Date Issued
2025-07-02
Author(s)
Abstract
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.
Subjects
Double perovskite
Green emission
Luminescence
Phosphor
Solid-state lighting
SDGs
Publisher
Springer Science and Business Media LLC
Type
journal article