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首页> 外文期刊>Journal of Physics, D. Applied Physics: A Europhysics Journal >Photoluminescence properties of porous anodic aluminium oxide membranes formed in mixture of sulfuric and oxalic acid
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Photoluminescence properties of porous anodic aluminium oxide membranes formed in mixture of sulfuric and oxalic acid

机译：硫酸和草酸混合形成的多孔阳极氧化铝膜的光致发光特性

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摘要

Porous anodic aluminium oxide (AAO) membranes with ordered nanopore arrays were fabricated electrochemically in the mixture electrolytes with various volume ratios of 0.3M H2SO4 and 0.3 M C2H2O4. Photoluminescence (PL) properties of as-prepared AAO membranes were investigated. It was found that a 290 nm emission was observed in the AAO samples formed in the H2SO4 electrolyte and a 325 nm emission in the samples formed in the C2H2O4 electrolyte, respectively. For the AAO membranes anodized in the mixture electrolytes, both 290 and 325 nm emissions appeared together; moreover, the 290 nm peak was weakened, and the 325 nm peak was enhanced dramatically. It is suggested that the 290 and 325 nm emissions could be attributed to the luminescent centres transformed from sulfuric and oxalic impurities, respectively, and that nonradiative energy transfer occurs between these two kinds of PL centres.
机译：在具有不同体积比的0.3M H2SO4和0.3M C2H2O4的混合电解质中，电化学制备了有序纳米孔阵列的多孔阳极氧化铝（AAO）膜。研究了制备的AAO膜的光致发光（PL）特性。发现在H 2 SO 4电解质中形成的AAO样品中观察到290nm的发射，而在C 2 H 2 O 4电解质中形成的样品中观察到325nm的发射。对于在混合电解质中进行阳极氧化的AAO膜，同时出现290和325 nm发射。此外，290 nm峰减弱，而325 nm峰显着增强。建议将290和325 nm的发射分别归因于由硫和草酸杂质转化的发光中心，并且这两种PL中心之间发生了非辐射能量转移。

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