Luminescent structures based on porous anodic alumina

In this study, the possibility of fabrication of europium- and terbium-doped structures based on porous anodic alumina (PAA) grown in orthophosphoric and oxalic acid electrolytes, has been investigated. Europium or terbium ions were introduced in the pores of anodic alumina by either impregnation with sols or by immersion in alcoholic solution containing lanthanide salts. Strong europium and terbium photoluminescence was observed not only from the structures xerogel/PAA, but in PAA films fabricated in orthophosphoric acid and immersed in solution of lanthanide Elemental depth profiles of PAA of 30 mum thickness revealed homogeneous distribution of lanthanides along the whole thickness of porous layer.