Electroluminescence of Zinc Sulfoselenide Phosphors with Copper Activator and Halide Coactivators

Abstract

The choice of halide coactivators in the synthesis of electroluminescent powder phosphors of the system markedly affects the spectral distribution and efficiency of the phosphors. Iodide coactivated can be prepared as a blue‐emitting phosphor exhibiting no shift in spectral emission with field excitation from 20 to 50,000 cps. Several‐fold increase in radiant output over the chloride coactivated phosphor is obtained by using iodide coactivator.