Effect of Anodizing Medium on The Morphology and Photoluminescent Property of Porous Alumina Film

Subhranshu Chatterjee, Jaya Sarkar, Amitava Basu Mallick, Debdas Roy, Pritam Deb


Anodic alumina films with uniformly distributed
self assembled pores of diameters in the nanometric length scale
were prepared by dual step anodization technique in
oxalic, phosphoric and sulphuric acid medium. The variations
of pore morphology and photoluminescent properties were
studied with respect to the change in electrolytic
medium. The photoluminescence (PL) spectra of the films
prepared in different electrolytic medium have been recorded
and compared. The PL spectra of the porous anodic alumina
(PAA) film prepared in oxalic acid was found to be much
stronger than the PAA prepared in phosphoric and sulphuric
acid. However, pore size of the PAA films prepared in oxalic
and sulphuric acid were significantly smaller than the PAA
films prepared in phosphoric acid medium. Presence of oxygen
deficient defect centre exerts a strong influence on the PL
properties of the films.


Photoluminescent; Porous anodic alumina film; FESEM

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