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首页> 外文期刊>Advanced Functional Materials >ZnO Nanorod Arrays as Electron Injection Layers for Efficient Organic Light Emitting Diodes
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ZnO Nanorod Arrays as Electron Injection Layers for Efficient Organic Light Emitting Diodes

机译：ZnO纳米棒阵列作为高效有机发光二极管的电子注入层

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摘要

Nanostructured oxide arrays have received significant attention as charge injection and collection electrodes in numerous optoelectronic devices. Zinc oxide (ZnO) nanorods have received particular interest owing to the ease of fabrication using scalable, solution processes with a high degree of control of rod dimension and density. Here, vertical ZnO nanorods as electron injection layers in organic light emitting diodes are implemented for display and lighting purposes. Implementing nanorods into devices with an emissive polymer, poly(9,9-dioctyluorene-alt-benzothiadiazole) (F8BT) and poly(9,9-di-n-octylfluorene-alt-N-(4-butylphenyl)dipheny-lamine) (TFB) as an electron blocking layer, brightness and efficiencies up to 8602 cd m(-2) and 1.66 cd A(-1) are achieved. Simple solution processing methodologies combined with postdeposition thermal processing are highlighted to achieve complete wetting of the nanorod arrays with the emissive polymer. The introduction of TFB to minimize charge leakage and nonradiative exciton decay results in dramatic increases to device yields and provides an insight into the operating mechanism of these devices. It is demonstrated that the detected emission originates from within the polymer layers with no evidence of ZnO band edge or defect emission. The work represents a significant development for the ongoing implementation of ZnO nanorod arrays into efficient light emitting devices.
机译：纳米结构的氧化物阵列作为电荷注入和收集电极在许多光电器件中受到了广泛的关注。氧化锌（ZnO）纳米棒由于使用可扩展的溶液工艺易于制造且对棒尺寸和密度的控制程度高而受到了特别关注。在此，将垂直的ZnO纳米棒作为有机发光二极管中的电子注入层，用于显示和照明目的。用发射聚合物，聚（9,9-二辛基芴-alt-苯并噻二唑）（F8BT）和聚（9,9-二-正辛基芴-alt-N-（4-丁基苯基）二苯胺）将纳米棒安装到设备中（TFB）作为电子阻挡层，可实现高达8602 cd m（-2）和1.66 cd A（-1）的亮度和效率。重点介绍了简单的溶液处理方法与沉积后热处理相结合的方法，以实现用发光聚合物完全润湿纳米棒阵列。引入TFB可以最大程度地减少电荷泄漏和非辐射激子衰减，从而大大提高了器件的成品率，并为这些器件的工作机理提供了见识。已证明检测到的发射来自聚合物层内部，没有ZnO带边缘或缺陷发射的迹象。这项工作代表了正在进行的将ZnO纳米棒阵列实施到高效发光器件中的重大进展。

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  • 来源
    《Advanced Functional Materials》 |2015年第29期|4657-4663|共7页
  • 作者

    Faria Jorge C. D.; Campbell Alasdair J.; McLachlan Martyn A.;

  • 作者单位

    Univ London Imperial Coll Sci Technol & Med, Dept Phys, London SW7 2AZ, England|Univ London Imperial Coll Sci Technol & Med, Ctr Plast Elect, London SW7 2AZ, England;

    Univ London Imperial Coll Sci Technol & Med, Dept Phys, London SW7 2AZ, England|Univ London Imperial Coll Sci Technol & Med, Ctr Plast Elect, London SW7 2AZ, England;

    Univ London Imperial Coll Sci Technol & Med, Dept Mat, London SW7 2AZ, England|Univ London Imperial Coll Sci Technol & Med, Ctr Plast Elect, London SW7 2AZ, England;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    conjugated polymers; nanorods; organic electronics; light-emitting diodes; zinc oxide;

    机译：共轭聚合物;纳米粒子;有机电子学;发光二极管;氧化锌;

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