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首页> 外文期刊>Solid State Communications >Enhanced electroluminescence of ZnO nanocrystalline annealing from mesoporous precursors
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Enhanced electroluminescence of ZnO nanocrystalline annealing from mesoporous precursors

机译：介孔前体对ZnO纳米晶退火的增强电致发光

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An improved sol-gel method was used to prepare ZnO nanoparticles. EL results showed that slowing the addition of LiOH solution and heating in vacuum to obtain gel precipitation made the final ZnO samples' emission peak blue shift to 520 nm. Simultaneously, the peak value of the sample processed with no templates was enhanced 4.68 times and that of the sample processed with ODA was enhanced 0.71 times. Two copolymers Pluronic P123 (P123) and Pluronic F-127 (F-127) were adopted respectively as template reagents. The obtained mesoporous ZnO precursors exhibited a surface area of 69.21 m(2)/g and 103.57 m(2)/g and an average pore size of 6.61 nm and 5.70 nm, respectively. After calcining in a muffle furnace in air, the obtained ZnO nanocrystalline samples from these precursors revealed stronger green emission than the samples dealt with ODA. Compared to the magnification multiple of 0.89 times of the sample processed with ODA, the peak intensity of the sample processed with P123 was 2.03 times higher than that of the sample processed with no template reagents, and the intensity of the sample processed with F-127 was 3.3 times higher. This may be due to the larger surface area of samples from the longer molecule chains of the two template reagents. (c) 2006 Elsevier Ltd. All rights reserved.
机译：采用改进的溶胶-凝胶法制备了ZnO纳米粒子。 EL结果表明，减慢LiOH溶液的添加速度并在真空中加热以获得凝胶沉淀，使得最终ZnO样品的发射峰蓝移至520 nm。同时，不使用模板处理的样品的峰值提高了4.68倍，而使用ODA处理的样品的峰值提高了0.71倍。分别采用两种共聚物Pluronic P123（P123）和Pluronic F-127（F-127）作为模板试剂。所得介孔ZnO前体的表面积分别为69.21 m（2）/ g和103.57 m（2）/ g，平均孔径分别为6.61 nm和5.70 nm。在马弗炉中于空气中煅烧后，从这些前体获得的ZnO纳米晶样品显示出比经ODA处理的样品更强的绿色发射。与使用ODA处理的样品的0.89倍的放大倍数相比，用P123处理的样品的峰值强度是不使用模板试剂处理的样品的峰值强度的2.03倍，而用F-127处理的样品的峰值强度是是3.3倍。这可能是由于来自两种模板试剂较长分子链的样品表面积较大。 （c）2006 Elsevier Ltd.保留所有权利。

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