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Current Enhancement in Organic Films through Gap Compression by Cold and Hot Isostatic Pressing

机译：通过冷热等静压的间隙压缩来增强有机膜中的电流

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摘要

The spatial gaps in organic films are compressed using cold and hot isostatic pressing (CIP and HIP, respectively) with the aim of enhancing their electrical characteristics. The microscopic gaps formed in amorphous organic films by inefficient molecular packing are difficult to compress using CIP and HIP; however, the macroscopic gaps formed between grains and other grains or substrates in polycrystalline organic films can be compressed using CIP and HIP. The gap compression by CIP and HIP in polycrystalline films enhances their electrical characteristics. Conversely, the electrical characteristics of amorphous films remain unchanged after CIP and HIP. HIP gives almost the same results as CIP in terms of gap compression and current enhancement, probably because the expected activation of molecular motion at high temperature is suppressed under high applied pressure. CIP markedly improves the performance of organic light-emitting diodes, organic solar cells, and organic field-effect transistors containing polycrystalline films. These findings are important for understanding the carrier injection and transport mechanisms of organic films containing gaps as well as enhancing the performance of future organic devices, especially those with polycrystalline films.
机译：为了增强其电特性，使用冷和热等静压（分别为CIP和HIP）压缩有机膜中的空间间隙。由于效率低下的分子堆积，在非晶态有机薄膜中形成的微观间隙很难用CIP和HIP压缩；但是，可以使用CIP和HIP压缩多晶有机薄膜中晶粒与其他晶粒或基材之间形成的宏观间隙。通过CIP和HIP在多晶薄膜中进行的间隙压缩可增强其电特性。相反，在CIP和HIP之后，非晶膜的电特性保持不变。在间隙压缩和电流增强方面，HIP产生的结果几乎与CIP相同，这可能是因为在较高的施加压力下，高温下预期的分子运动活化被抑制了。 CIP显着提高了包含多晶膜的有机发光二极管，有机太阳能电池和有机场效应晶体管的性能。这些发现对于理解包含间隙的有机膜的载流子注入和传输机制以及增强未来有机器件（尤其是具有多晶膜的有机器件）的性能非常重要。

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  • 来源
    《Advanced Functional Materials》 |2016年第17期|2940-2949|共10页
  • 作者

    Esaki Yu; Matsushima Toshinori; Adachi Chihaya;

  • 作者单位

    Kyushu Univ, Ctr Organ Photon & Elect Res, Nishi Ku, 744 Motooka, Fukuoka 8190395, Japan;

    Kyushu Univ, Ctr Organ Photon & Elect Res, Nishi Ku, 744 Motooka, Fukuoka 8190395, Japan|Japan Sci & Technol Agcy JST, ERATO, Adachi Mol Exciton Engn Project, Nishi Ku, 744 Motooka, Fukuoka 8190395, Japan;

    Kyushu Univ, Ctr Organ Photon & Elect Res, Nishi Ku, 744 Motooka, Fukuoka 8190395, Japan|Japan Sci & Technol Agcy JST, ERATO, Adachi Mol Exciton Engn Project, Nishi Ku, 744 Motooka, Fukuoka 8190395, Japan|Kyushu Univ, Int Inst Carbon Neutral Energy Res, Nishi Ku, 744 Motooka, Fukuoka 8190395, Japan;

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