Photoluminescence from Anodic Aluminum Oxide Formed via Etidronic Acid Anodizing and Enhancing the Intensity
Photoluminescence from Anodic Aluminum Oxide Formed via Etidronic Acid Anodizing and Enhancing the Intensity
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DOI：
10.2320/matertrans.mt-m2020010
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发表时间：
2020-01-01
影响因子：
1.2
通讯作者：
Natsui, Shungo
中科院分区：
文献类型：
--
作者：
Kikuchi, Tatsuya;Akiya, Shunta;Natsui, Shungo
通过荧光光谱研究了由依替膦酸阳极氧化形成的阳极氧化铝（AAO）的光致发光（PL）发射。在各种操作条件下，将高纯铝板在依替膦酸溶液中进行阳极氧化。典型的AAO膜的PL发射在激发波长约为250 - 275 nm和发射波长为375 - 450 nm范围内被确定，并且这种分布与通过典型羧酸处理形成的AAO膜有很大不同。PL强度随着依替膦酸溶液浓度的降低而增加。强度也随着阳极氧化时间和后续热处理而增加，然而过度阳极氧化和高温处理会导致强度降低。AAO膜由含有结合的依替膦酸根阴离子的外层氧化物和不含阴离子的薄蜂窝状内层氧化物组成，并且AAO膜中的氧空位和阴离子分布强烈影响PL强度。在0.05M依替膦酸中阳极氧化40小时并随后在773K下热处理2小时的适当操作条件使PL发射得到最大增强。
Photoluminescence (PL) emission from anodic aluminum oxide (AAO) formed by etidronic acid anodizing was investigated via fluorescence spectroscopy. Highly pure aluminum plates were anodized in an etidronic acid solution under various operating conditions. PL emission from the typical AAO film was identified with an approximately 250-275-nm range in excitation and a 375-450-nm range in emission, and this distribution was greatly different from the AAO film formed by typical carboxylic acid treatment. The PL intensity increased with the decrease of the concentration of etidronic acid solution. The intensity also increased with anodizing time and subsequent thermal treatment, whereas excess anodizing and high temperature treatment caused an intensity decrease. The AAO film consisted of an outer oxide containing incorporated etidronate anions and a thin honeycomb inner oxide without anions, and the oxygen vacancy localized in the AAO film and anion distribution strongly affected the PL intensity. The appropriate operating condition through anodizing in 0.05M etidronic acid for 40 h and subsequent thermal treatment at 773K for 2 h caused the maximum enhancement of the PL emission.