多孔铝镶嵌8-羟基喹啉铝荧光光谱研究

利用多孔铝非常高的孔隙率,将8羟基喹啉铝(Alq3)镶嵌到多孔铝中,得到多孔铝Alq3镶嵌膜.研究了镶嵌膜的荧光光谱,并与Alq3在溶液状态下的荧光光谱进行比较,发现其荧光光谱与Alq3在乙醇溶液中的光谱相似,呈现单分子的发光特征,并且光谱线形更加对称.实验表明,多孔介质有机镶嵌膜有可能成为进一步发展Alq3在电致发光器件方面应用的新途径.关键词：多孔铝8-羟基喹啉铝光致发光光谱

Photoluminescent spectra of 8-hydroxyquinoline aluminum embedded in porous alumina

Organic electroluminescent (EL) device based on Alq 3 has attracted much interest for its potentiality in material and device process, but the fluorescent degradation is significant in the presence of atmospheric moisture. At prensent, researchers try to encapsulate it in special environments with cooler equipments, thus it makes the capacity larger. Anodically oxidized alumina whose structure can be described as a close packed array of columns,each containing many fine regular parallel sided pores are usually used as a transparent host template for a variety of luminescent materials. The pore of anodic alumina was much larger than the molecular diameter of 8 hydroxyquinoline alumina, which can be successfully embedded in the porous alumina. We have studied the photoluminescence(PL) of the embedded films and compare them with the PL of Alq 3 in alcohol.It was shown that the PL of the embedded film was similar to that in liquid, but the symmetry of the compound film is better.The peak of it exhibits blue shift,however, the full width at half maximum is larger. The experimental results suggest that the porous alumina may be a better encapsulated media for Alq 3, and this may invoke a new way for Alq 3 in the application in electroluminescence.