Photoluminescence of SrGa₂S₄:Bi Phosphor

Abstract

Bi-activated SrGa₂S₄ (SrGa₂S₄:Bi) phosphor exhibits green luminescence with a peak wavelength of 533 nm and a full width half maximum of 58 nm. This luminescence is attributed to the 6p-6s transition in the 6s² configuration of Bi³⁺. As SrGa₂S₄ is co-activated by the Bi³⁺ and Mn²⁺ ions, the excitation band around 400 nm is enhanced relative to that around 300 nm. Since the PL properties of SrGa₂S₄:Bi were similar to those of SrGa₂S₄:Eu, the SrGa₂S₄:Bi phosphors are potential alternatives to SrGa₂S₄:Eu phosphors.