酸根离子掺杂对多孔阳极氧化铝光致发光特性的影响

高等学校化学学报 ›› 2009, Vol. 30 ›› Issue (8): 1621.

酸根离子掺杂对多孔阳极氧化铝光致发光特性的影响

李燕¹, 王成伟^1,2, 李守义¹, 刘维民²

1. 西北师范大学物理与电子工程学院,
2. 中国科学院兰州化学物理研究所固体润滑国家重点实验室, 兰州 730000

收稿日期:2008-09-22 出版日期:2009-08-10 发布日期:2009-08-10
通讯作者: 王成伟, 男, 博士, 教授, 主要从事纳米材料的制备与物理化学性质的研究. E-mail: cwwang@nwnu.edu.cn
基金资助:
国家自然科学基金(批准号: 10774121)、甘肃省自然科学基金(批准号: 0803RJZA102)和西北师范大学三期“知识与科技创新工程”项目(批准号: NWNU-KJCXGC-03-22)资助.

Influence of Acid Radical Ions upon Photoluminescence Properties of Anodic Aluminum Oxide

LI Yan¹, WANG Cheng-Wei^1,2*, LI Shou-Yi¹, LIU Wei-Min²

1. College of Physics and Electronic Engineering, Northwest Normal University,
2. State Key Laboratory of Solid Lubrication, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou 730070, China

Received:2008-09-22 Online:2009-08-10 Published:2009-08-10
Contact: WANG Cheng-Wei. E-mail: cwwang@nwnu.edu.cn
Supported by:
国家自然科学基金(批准号: 10774121)、甘肃省自然科学基金(批准号: 0803RJZA102)和西北师范大学三期“知识与科技创新工程”项目(批准号: NWNU-KJCXGC-03-22)资助.

摘要/Abstract

摘要：

采用电化学二次阳极氧化法分别在纯硫酸、纯草酸及硫酸-草酸混合电解液中制备了3个系列的多孔阳极氧化铝(AAO)样品, 考察了它们在250 nm光激发下的光致发光(PL)特性. 研究结果表明, 各系列AAO样品在350～450 nm波段范围内的PL谱形均完全相似, 具有相同的发光中心, 即氧空位缺陷态; 掺杂进入AAO样品的SO₄^2-和C₂O₄^2-分解形成的发光中心对应的光发射分别在288和328 nm附近; 对于硫酸-草酸混合电解液中生长的AAO样品, 其在328 nm附近的发光峰随着硫酸-草酸体积比的增大呈先增大后减少的变化, 而288 nm附近的发光峰却由基本消失到逐渐显现. 初步分析了该现象的成因.

关键词: 多孔阳极氧化铝; 光致发光; 能量转移

Abstract:

Photoluminescence(PL) properties of anodic aluminum oxide(AAO) membranes with an ordered nanopore array formed in a mixture of sulfuric acid and oxalic acid solution with various volume ratios by two-step anodizing process were investigated under an excitation at 250 nm. Measurements reveal that the PL band in the wavelength range of 350—450 nm originates from optical transitions from oxygen vacancies, the 288 nm and 328 nm peaks attribute to the impurities of SO₄^2- and C2O₄^2- in AAO, respectively. With the increasing ratio of SO₄^2- vs. C₂O₄^2-, the intensity of 328 nm peak reaches a maximum value and then decreases, but the peak located at 288 nm vanishes nearly, then appears gradually. Analyse suggests that there is likely to be nonradiative energy transfer between the two kinds of PL centers originated from SO₄^2- and C₂O₄^2-. An energy transfer mechanism was proposed to explain the behaviors of the emission at 328 nm, and it was tentatively suggested by the PL properties of AAO membranes with dual-layered structure fabricated from sulfuric acid and oxalic acid.

Key words: Porous anodic alumimum oxide; Photoluminescence; Energy transfer

TrendMD:

李燕, 王成伟, 李守义, 刘维民. 酸根离子掺杂对多孔阳极氧化铝光致发光特性的影响. 高等学校化学学报, 2009, 30(8): 1621.

LI Yan, WANG Cheng-Wei*, LI Shou-Yi, LIU Wei-Min. Influence of Acid Radical Ions upon Photoluminescence Properties of Anodic Aluminum Oxide. Chem. J. Chinese Universities, 2009, 30(8): 1621.

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