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 Eu
3+ 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.
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