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Significance of the gate voltage-dependent mobility in the electrical characterization of organic field effect transistors

机译：栅极电压相关迁移率在有机场效应晶体管电学表征中的意义

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摘要

We studied the effect of the addition of free hole-and electron-rich organic molecules to organic semiconductors (OSCs) in organic field effect transistors (OFETs) on the gate voltage-dependent mobility. The drain current versus gate voltage characteristics were quantitatively analyzed using an OFET mobility model of power law behavior based on hopping transport in an OSC. This analysis distinguished the threshold voltage shifts, depending on the materials and structures of the OFET device, and properly estimated the hopping transport of the charge carriers induced by the gate bias within the OSC from the power law exponent parameter. The addition of pentacene or C-60 molecules to a one-monolayer pentacene-based OFET shifted the threshold voltages negatively or positively, respectively, due to the structural changes that occurred in the OFET device. On the other hand, the power law parameters revealed that the addition of charge carriers of the same or opposite polarity enhanced or hindered hopping transport, respectively. This study revealed the need for a quantitative analysis of the gate voltage-dependent mobility while distinguishing this effect from the threshold voltage effect in order to understand OSC hopping transport in OFETs. Published by AIP Publishing.
机译：我们研究了在有机场效应晶体管（OFET）中将自由空穴和富电子的有机分子添加到有机半导体（OSC）中对栅极电压相关迁移率的影响。使用基于OSC中跳跃传输的幂律行为的OFET迁移率模型，定量分析了漏极电流与栅极电压的关系。该分析根据OFET器件的材料和结构区分了阈值电压漂移，并根据功率定律指数参数正确估计了OSC内栅极偏置引起的电荷载流子的跃迁。由于在OFET装置中发生的结构变化，将并五苯或C-60分子添加到基于单层并五苯的OFET中会使阈值电压分别负向或正向移动。另一方面，幂律参数表明，相同或相反极性的电荷载流子的添加分别增强或阻碍了跳变传输。这项研究表明，需要对栅极电压依赖性迁移率进行定量分析，同时将这种效应与阈值电压效应区分开来，以了解OFET中的OSC跳跃传输。由AIP Publishing发布。

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  • 来源
    《Applied Physics Letters》 |2018年第17期|173301.1-173301.4|共4页
  • 作者

    Kim Jong Beom; Lee Dong Ryeol;

  • 作者单位

    Soongsil Univ, Dept Phys, Seoul 06978, South Korea;

    Soongsil Univ, Dept Phys, Seoul 06978, South Korea;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);
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  • 正文语种 eng
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