Reduction of surface recombination current in GaAs p-n junctions

Abstract
Planar Zn‐diffused GaAs pn junctions have been prepared with a 2000‐Å surface layer of high‐resistivity O‐doped Al0.5Ga0.5As. This surface layer significantly reduces the surface recombination current and permits the bulk diffusion current, I∝exp(qV/kT), to dominate at current densities as low as ∼5×10−3 A/cm2.