Eu Ion Implantation into a Anodic Oxide Barrier Film on Aluminum and its Electroluminescence

For the development of electroluminescence devices made from anodic oxide films on aluminum, Eu ions were implanted into a barrier film, and red electroluminescence from Eu3+ was observed during film reanodization.Red electroluminescence from specimens without surface pretreatment occurred at about 100V and its intensity raised with increasing of voltage. It also continued for several minutes with a weak current density of 0.03mA·cm-2 at a constant voltage of 350V.Luminescence intensity was influenced by surface conditions, so electroluminescence from specimens without surface pretreatment was 7 times stronger than with electropolishing. Electroluminescence intensity was thus considered to be influenced by flaws in the film.