纳米多孔Al_2O_3薄膜的制备及其光致发光  

Preparation and photoluminescence of nanoporous alumina films

作　　者：李志军[1] 许勤芳[1] 王倩[1] 

机构地区：[1]新疆大学物理科学与技术学院,新疆乌鲁木齐830046

出　　处：《西北师范大学学报（自然科学版）》2011年第4期74-76,97,共4页Journal of Northwest Normal University(Natural Science)

基　　金：国家自然科学基金资助项目(10665002)

摘　　要：利用二次阳极氧化法在室温条件下制备了多孔氧化铝薄膜.采用扫描电镜、能量色散谱和X射线衍射对空气中600℃退火处理的多孔氧化铝薄膜进行了表面形貌、成分和结晶形式分析.结果表明,多孔氧化铝薄膜孔阵排列有序,孔径大小一致,含有微量的C元素且为非晶态结构.在340 nm的光激发下,多孔氧化铝薄膜出现峰值位于470nm的蓝绿发光带,此光致发光带与草酸根离子发光基团有关.Porous alumina film is fabricated in oxalic acid electrolyte by a two-step anodization method at room temperature.The film is annealed at 600 ℃ in the air.The surface morphology and crystalline state of the annealed film are investigated by scanning electron microscopy and X-ray diffraction,respectively.The constituent elements on the film surface are determined by energy disperse spectroscopy.The results show that the film is amorphous and present highly ordered structures with uniform pore distribution,and includes trace carbon.The film presents a blue-green emission band at 470 nm when it is excited at 340 nm.A possible mechanism is proposed that the origin of the emission band is related to the oxalate luminophore.

关 键 词：多孔氧化铝薄膜 二次阳极氧化法 光致发光 

分 类 号：O614.3[理学—无机化学] O435.1[理学—化学]