Heat-treatment temperature tuning the phase composition and luminescence of Mg2SnO4:Eu3+ phosphors

This study delves into the synthesis and characterization of Mg2SnO4:Eu3+ phosphors, focusing on the impact of heat-treatment temperature on their phase composition and luminescent properties. The research highlights the successful synthesis of these phosphors using the microdroplet spray pyrolysis method, which ensures uniform spherical particles and high luminescence intensity. Key findings include the identification of phase transformations at different temperatures, with pure-phase Mg2SnO4 achieved at 1100°C and a two-phase composite structure at lower temperatures. The study reveals that the presence of the SnO2 phase significantly enhances the orange luminescence of Eu3+ at the 5D0→7F1 transition. Additionally, the afterglow properties of the phosphors are investigated, showing that the afterglow duration and intensity are influenced by the heat-treatment temperature and the resulting trap levels. The thermal stability of the phosphors is also examined, demonstrating that higher heat-treatment temperatures improve thermal stability. The conclusions emphasize the potential applications of these phosphors in displays and anti-counterfeiting technologies, providing a foundation for designing high-performance rare-earth-doped phosphors.