TY - JOUR
T1 - Enhanced Green and Orange–Red Dual Luminescence Emissions of Zn0.5Ca0.5Al2O4
T2 - Tb3+, Sm3+ Phosphors Stimulated by Crystallinity: Effects of Annealing Temperature
AU - Dlamini, Clinton
AU - Mokoena, Teboho P.
AU - Mofokeng, Sefako J.
AU - Maphiri, Vusani M.
AU - Mhlongo, Motlalepula R.
N1 - Publisher Copyright:
© 2025 The Author(s). physica status solidi (a) applications and materials science published by Wiley-VCH GmbH.
PY - 2026/1
Y1 - 2026/1
N2 - This study investigates the effects of varying annealing temperatures (AT) on the structural and luminescent properties of codoped Zn0.5Ca0.5Al2O4:0.1% Tb3+, 0.1% Sm3+ (ZC:0.1% Tb3+ 0.1% Sm3+), synthesized via the citrate sol–gel method. The AT significantly impacts the crystallinity, phase composition, and photoluminescent behavior of the codoped phosphor. Optimal luminescence efficiency and color purity are observed at an AT of 900°C, which provides high luminescence efficiency and desirable color characteristics. At lower temperatures, the emission is more bluish-green, shifting toward yellow–red with increased AT. However, beyond 900°C, thermal quenching effects reduce emission intensity and alter chromaticity coordinates, leading to decreased color purity. This research highlights the importance of precise temperature control in developing high-performance phosphors for advanced optoelectronic applications.
AB - This study investigates the effects of varying annealing temperatures (AT) on the structural and luminescent properties of codoped Zn0.5Ca0.5Al2O4:0.1% Tb3+, 0.1% Sm3+ (ZC:0.1% Tb3+ 0.1% Sm3+), synthesized via the citrate sol–gel method. The AT significantly impacts the crystallinity, phase composition, and photoluminescent behavior of the codoped phosphor. Optimal luminescence efficiency and color purity are observed at an AT of 900°C, which provides high luminescence efficiency and desirable color characteristics. At lower temperatures, the emission is more bluish-green, shifting toward yellow–red with increased AT. However, beyond 900°C, thermal quenching effects reduce emission intensity and alter chromaticity coordinates, leading to decreased color purity. This research highlights the importance of precise temperature control in developing high-performance phosphors for advanced optoelectronic applications.
KW - aluminates
KW - annealing temperature
KW - color purity
KW - crystallinity
KW - thermal quenching
UR - https://www.scopus.com/pages/publications/105024469825
U2 - 10.1002/pssa.202500665
DO - 10.1002/pssa.202500665
M3 - Article
AN - SCOPUS:105024469825
SN - 1862-6300
VL - 223
JO - Physica Status Solidi (A) Applications and Materials Science
JF - Physica Status Solidi (A) Applications and Materials Science
IS - 2
M1 - e202500665
ER -