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首页> 外文期刊>Advanced Functional Materials >High K Capacitors and OFET Gate Dielectrics from Self-Assembled BaTiO_3 and (Ba,Sr)TiO_3 Nanocrystals in the Superparaelectric Limit
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High K Capacitors and OFET Gate Dielectrics from Self-Assembled BaTiO_3 and (Ba,Sr)TiO_3 Nanocrystals in the Superparaelectric Limit

机译：自组装BaTiO_3和（Ba，Sr）TiO_3纳米晶体在超顺电极限中的高K电容器和OFET栅极电介质

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摘要

Nanodielectrics is an emerging field with applications in capacitors, gate dielectrics, energy storage, alternatives to Li-ion batteries, and frequency modulation in communications devices. Self-assembly of high k dielectric nanoparticles is a highly attractive means to produce nanostructured films with improved performance-namely dielectric tunability, low leakage, and low loss-as a function of size, composition, and structure. One of the major challenges is conversion of the nanoparticle building block into a reliable thin film device at conditions consistent with integrated device manufacturing or plastic electronics. Here, the development of BaTiO_3 and (Ba,Sr)TiO_3 superparaelectric uniform nanocrystal (8-12 nm) films prepared at room temperature by evaporative driven assembly with no annealing step is reported. Thin film inorganic and polymer composite capacitors show dielectric constants in the tunable range of 10-30, dependent on composition, and are confirmed to be superparaelectric. Organic thin film transistor (TFT) devices on flexible substrates demonstrate the readiness of nanoparticle-assembled films as gate dielectrics in device fabrication.
机译：纳米电介质是一个新兴领域，其应用领域包括电容器，栅极电介质，能量存储，锂离子电池的替代品以及通信设备中的频率调制。高k介电纳米颗粒的自组装是生产具有改善的性能（即介电可调性，低泄漏和低损耗）随尺寸，组成和结构变化的纳米结构薄膜的极具吸引力的方法。主要挑战之一是在与集成设备制造或塑料电子技术一致的条件下，将纳米颗粒构造块转换为可靠的薄膜设备。在这里，报道了在没有退火步骤的情况下通过蒸发驱动组装在室温下制备的BaTiO_3和（Ba，Sr）TiO_3超顺电均匀纳米晶体（8-12 nm）薄膜的发展。薄膜无机和聚合物复合电容器的介电常数在10至30的可调范围内，具体取决于组成，并且被证实是超顺电的。柔性基板上的有机薄膜晶体管（TFT）器件展示了纳米颗粒组装膜作为器件制造中的栅极电介质的就绪性。

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  • 来源
    《Advanced Functional Materials》 |2010年第4期|554-560|共7页
  • 作者

    Limin Huang; Zhang Jia; Ioannis Kymissis; Stephen OBrien;

  • 作者单位

    Department of Chemistry City University of New York, City College of New York 1131 Marshak Building, New York, NY 10031 (USA);

    Department of Electrical Engineering Columbia University 1300 S. W. Mudd Building, 500 West 120th Street New York, NY 10027 (USA);

    Department of Electrical Engineering Columbia University 1300 S. W. Mudd Building, 500 West 120th Street New York, NY 10027 (USA);

    Department of Chemistry City University of New York, City College of New York 1131 Marshak Building, New York, NY 10031 (USA);

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