Abstract
We have investigated the luminescence property of anodic alumina membranes (AAM) with orderednanopore arrays prepared by electrochemically anodizing aluminium in oxalic acid, sulfuricacid and phosphoric acid solutions. The photoluminescence (PL) intensity of AAM prepared inC2H2O4 is much higher than that of AAMs prepared inH2SO4 and H3PO4. The PL spectra obtained show that there are two optical centres for the AAMs prepared inH2SO4 andH3PO4, of which the firstoriginates from the F+ centres, and the second is associated with the F centres. It is found that the oxalic impuritiesincorporated in the AAMs should have important influences on the optical properties of AAM preparedin C2H2O4. The blue emission band in the AAM prepared inC2H2O4 originates fromthe coactions of the F+ centres, the F centre and the luminescent centres transformed from oxalic impurities.
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