Photo and Thermo‐luminescence Properties of Mn⁴⁺, Ce⁴⁺ and Sm³⁺ in MgAl₂Si₂O₈ Phosphor

Abstract

Abstract Mn 4+ , Ce 4+ and Sm 3+ doped MgAl 2 Si 2 O 8 ‐based phosphors were synthesized at 1300 °C by solid state reaction and characterized by thermogravimetry (TG), differential thermal analysis (DTA), X‐ray powder diffraction (XRD), photoluminescence (PL), thermoluminescence (TL) and scanning electron microscopy (SEM). The phosphors showed broad red emission bands in the range of 610–715 nm and different maximum intensity when activated by UV illumination. Such a red emission can be attributed to the intrinsic 2 E→ 4 A 2 transitions of Mn 4+ .