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Facile tailoring of the electrical transport in representative hole transport materials by molecular doping

机译：通过分子掺杂的代表性孔输送材料中的电气运输剪裁

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摘要

N,N'-Diphenyl-N,N'-bis(1-naphthyl)-1,1'-biphenyl-4,4'-diamine (NPB) and 4,4',4"-tris (N-3-methylphenyl-N-phenylamine) triphenylamine (m-MTDATA) are widely used as hole transport materials in organic optoelectronic devices. In the present article, the hole transport properties of blends of NPB and m-MTDATA compared with the pristine materials are investigated using admittance spectroscopy and considering temperature dependent current-voltage characteristics and electroluminescent characteristics. It has been found that m-MTDATA dramatically lowers the carrier mobility in the NPB matrix to a large extent by enhancing the total density of traps and results in more dispersive transport. However, by introducing NPB into m-MTDATA the hole mobility is nearly unchanged in comparison with pristine m-MTDATA film. These differences are attributed to two different charge transport mechanisms, trapping and scattering. Obtained quantitative information regarding the charge transport parameters could help to extend optimization strategies for the fabrication of new organic optoelectronic devices by enabling the facile tailoring of the charge transport process.
机译：N，N'-二苯基-N，N'-BIS（1-萘基）-1,1'-联苯-4,4'-二胺（NPB）和4,4'，4“ - 三” - 三分之一（N-3-甲基苯基-N-苯胺）三苯胺（M-MTDATA）广泛用作有机光电器件中的空穴传输材料。在本文中，使用导纳，研究了与原始材料相比的NPB和M-MTDATA共混物的空穴传输性能光谱学并考虑温度依赖性电流 - 电压特性和电致发光特性。已经发现，通过提高陷阱的总密度并导致更分散的运输，M-Mtdata在很大程度上大大降低了NPB矩阵中的载流子迁移率。然而，通过将NPB引入M-MTDATA，与原始M-MTDATA膜相比，孔迁移率几乎不变。这些差异归因于两个不同的电荷传输机制，捕获和散射。获得了关于电荷传输参数的定量信息通过使电荷运输过程的谨慎剪裁来帮助扩展新的有机光电器件的优化策略。

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  • 来源
    《RSC Advances》 |2018年第46期|共7页
  • 作者

    Li Bixin; Zhao Chenyang; Zhang Shiyang; Zhen Min;

  • 作者单位

    Hunan First Normal Univ Lab Coll Phys Dept Sci Educ Changsha 410205 Hunan Peoples R China;

    Univ Chinese Acad Sci Changchun Inst Appl Chem State Key Lab Polymer Phys &

    Chem Changchun 130022 Jilin Peoples R China;

    Hunan First Normal Univ Lab Coll Phys Dept Sci Educ Changsha 410205 Hunan Peoples R China;

    Hunan First Normal Univ Lab Coll Phys Dept Sci Educ Changsha 410205 Hunan Peoples R China;

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  • 正文语种 eng
  • 中图分类 化学;
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