The hole diffusion length in epitaxial zinc selenide

Hole diffusion lengths were determined for two epitaxial n-type ZnSe layers by fitting the measured photoluminescence spectra to a theoretical expression which contains the measured absorption constants. The room temperature hole diffusion lengths are found to be 0.1 and 0.06 μm for ZnSe with electron concentrations of 1.6 × 1017 and 9.0 × 1017 cm-13, respectively. These short diffusion lengths are attributed to a strong Hall-Shockley-Read recombination.