Saturation of Zn2SiO4 : Mn luminescence under intense vuv excitation

Abstract

Output luminescence of Zn₂SiO₄ : Mn phosphor saturates under intense vacuum ultraviolet radiation having a relatively high excitation duty ratio. The saturation is attributed to the depletion of activators at the ground level. This depletion originates from the long decay time constant of the phosphor. The saturation mechanism is explained analytically using a simple model, and the conditions for efficient phosphor excitation are derived.