乙醇对纳米多孔氧化铝薄膜光致发光特性的影响

Effect of Ethanol on Photoluminescence of Nanoporous Alumina Films

采用二次阳极氧化法,用乙醇与草酸的混合溶液制备纳米多孔氧化铝薄膜。扫描电子微镜结果显示,乙醇与草酸混合溶液中制备的氧化铝薄膜形貌更规整,有序度更高。光致发光测试结果表明,该混合电解液制备的薄膜的光致发光强度有明显的提高,且随乙醇浓度的增加,发光强度逐渐增大。结合红外反射光谱及X光电子能谱对上述实验现象进行了分析,为多孔氧化铝薄膜掺杂和改善其发光特性提供了新的思路。

The nanoporous alumina films were prepared by two-step anodic oxidation in ethanol-oxalic acid mixture. The scanning electron microscope(SEM) measurements reveal that the synthesized films have highly ordered pore arrangements. The photoluminescence(PL) measurements show that the PL intensity of the film has been significantly improved comparing with the films prepared in the oxalic acid,and the PL intensity increases with the ethanol concentration. The reasons for the above experimental phenomena were discussed combining the infrared reflectance spectroscopy with X-ray photoelectron spectroscopy. This work will provide a new idea for doping in the nanoporous alumina film and improving its luminescence property.