Yellow Electroluminescence from Al–Al2O3: Mn-Electrolyte System during Anodization of Al–Mn(1%) Alloy

Abstract

Yellow electroluminescence during the anodization of an Al–Mn(1%) alloy in certain electrolytes has a peak at about 560 nm, and the optimum content of Mn as activator is ca. 1%. Electrolytes of the barrier forming type, such as ammonium borate of 0.1 mol, and 2000 HizAC formation are suitable for obtaining intensive EL. Thin Al2O3: Mn phosphors can be formed by the anodization of Al–Mn(1%) alloys, and yellow EL occurs due to the collision-excitation of Mn activators by injected electrons from the oxide-electrolyte interface.