Influence of Calcination Temperature and Heating Program on NIR Afterglow Property of CaSnO3 : Bi2+.

In this study, CaSnO₃ : Bi²⁺ long afterglow phosphors were synthesized by high-temperature solid-state method, and its performance was researched. Calcination temperature and programs is factors which can affect material performance. Thus, changing various calcination temperatures and programs to determine the Optimum synthesis condition. The luminescent properties and microstructure of CaSnO₃ : Bi²⁺ phosphors were investigated by analyzing XRD spectra, SEM images, fluorescence spectra, afterglow decay curves, and thermoluminescence curves obtained from samples sintered at different temperatures and calcination programs. CaSnO₃ : Bi²⁺ calcinated at 1400°C exhibited the most desirable luminescent performance. Moreover, crystallinity can be improved by multiple calcination, and a greater number of effective traps was generated, resulting in superior afterglow properties compared to samples that were directly heated. [ABSTRACT FROM AUTHOR]