Abstract
Anodic aluminum oxide (AAO) films with highly ordered pore arrays were prepared in sulfuric, oxalic acids and their mixture solutions, respectively. The photoluminescence (PL) measurements show that AAO films formed in the mixture electrolytes have PL bands in the wavelength range of 300–450 nm, which mainly arise from the oxalic impurities incorporated into AAO films. However, the sulfuric ions have a strong effect on the PL bands. With the increase of the concentration of sulfuric ions in the mixture electrolyte, the blueshift of the PL bands occurs from 410 to 345 nm. The reasons of the results are being discussed.
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