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退火对有序孔洞氧化铝膜荧光性能的影响

Annealing Effect on Photoluminescence of Alumina Membranes with Ordered Pore Arrays

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【作者】 陈俊蔡维理牟季美

【Author】 CHEN Jun, CAI Wei-Li, MOU Ji-Mei (Department of Materials Science & Engineering, University of Science & Technology of China, Hefei 230026, China)

【机构】 中国科学技术大学材料科学与工程系!合肥230026

【摘要】 用阳极氧化法在草酸溶液或硫酸溶液中制备了有序阵列孔洞的氧化铝膜.研究了在不同温度下、不同气氛中退火对多孔氧化铝膜荧光性能的影响.结果表明,随着退火温度的升高,发光带的强度也随之增强;与此同时,发光带的峰位出现蓝移.当退火温度Ta=500℃时,在草酸中制备的氧化铝膜的发光强度最强;而在硫酸中制备的膜,其发光最强的退火温度为400℃.当 T≤400℃时,氧化铝膜的发光强度基本上与退火气氛无关;当 Ta=500℃时,在草酸中制备的膜在空气中退火后的发光强度高于在真空中退火后的发光强度.在草酸中制备的氧化铝膜的发光带明显比在硫酸中制备的膜强得多.电子自旋共振的实验结果表明,蓝光发光带来自多孔氧化铝膜中的F+心.我们还对多孔氧化铝膜发光特性的机制进行探讨.

【Abstract】 Alumina membranes with ordered pore arrays were prepared via anodization in am oxalic or sulfuric acid. Photoluminescence behavior of porous alumina membranes was studied by annealing the membranes in air or in vacuum of about 1x10-3Pa at different temperatures. The results show that the intensity of the photoluminescence (PL) band increases with the annealing temperature and the PL band exhibits a blue shift at the same time. The intensity of the PL band reaches its maximum for anodic alumina membranes prepared in oxalic acid when the annealing temperature Ta=500℃. While for membranes prepared in sulfuric acid, the maximum PL intensity appears at Ta=400℃. When Ta≤400℃, the PL intensities are almost independent of the annealing atmosphere; while the PL intensity of the membrane prepared in the oxalic acid after annealed in air is higher than that annealed in vacuum when Ta=500℃. The intensity of the PL band is much higher for alumina membranes prepared in oxalic acid than that prepared in sulfuric acid. Electron spin resonance results verify that the blue PL band comes from the F+ centers in porous alumina membranes. Mechanisms of the photoluminescence characterization of porous alumina membranes were discussed.

【关键词】 阳极氧化氧化铝膜光致发光
【Key words】 anodizationalumina membranesphotoluminescence
【基金】 国家自然科学基金(19974041)
  • 【文献出处】 无机材料学报 ,Journal of Inorganic Materials , 编辑部邮箱 ,2001年04期
  • 【分类号】TB383
  • 【被引频次】10
  • 【下载频次】98
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