• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Advanced Functional Materials >Organic Thin Film Transistors Based on Highly Dipolar Donor-Acceptor Polymethine Dyes
【24h】

Organic Thin Film Transistors Based on Highly Dipolar Donor-Acceptor Polymethine Dyes

机译：基于高双极给体-受体聚次甲基染料的有机薄膜晶体管

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Organic thin film transistors (OTFTs) of a series of twenty dipolar donor-acceptor-substituted polymethine dyes (D-A dyes, dipole moments from 3-15 D) are investigated. The employed merocyanine dyes contain a dime-thine bridge that is substituted with 1-alkyl-3,3-dimethylindolin-2-ylidene ("Fischer base"), 3-alkyl-2,3-dihydrobenzothiazol-2-ylidene or 1,3-benzodith-iole-2-ylidene, respectively, as electron-donating unit and various acceptor heterocycles. These studies show that thin films formed by these D-A dyes upon deposition in high vacuum are all composed of antiparallel π-stacked dimers. However, they are either amorphous, discontinuous or highly crystalline due to the interplay between molecule-substrate and dimer-dimer interactions. With the help of single crystal X-ray analysis, out-of-plane X-ray studies (XRD), selected area electron diffraction (SAED), and atomic force microscopy (AFM), a correlation between the molecular structure, film ordering, and hole charge transport ability can be established. The mobility values are compared to Bassler's disorder charge transport theory and a film growth mechanism is proposed based on DFT calculations and single crystal structures. The results show that with carefully adjusted bulky substituents and high dipolarity an intimate centrosymmetric packing with a slipped, but tight π-stacking arrangement could be realized. This provides two-dimensional percolation pathways for holes and ultimately results in charge carrier mobilities up to 0.18 cm~2 V~(-1) s~(-1).
机译：研究了一系列二十种偶极施主-受体取代的聚次甲基染料（D-A染料，偶极矩为3-15 D）的有机薄膜晶体管（OTFT）。所用的花菁染料含有被1-烷基-3,3-二甲基吲哚-2-亚基（“菲舍尔碱”），3-烷基-2,3-二氢苯并噻唑-2-亚烷基或1取代的二甲硫氨酸桥。 3-给电子单元和各种受体杂环分别为3-苯并二氢-碘-2-亚烷基。这些研究表明，由这些D-A染料在高真空下沉积时形成的薄膜均由反平行π堆积的二聚体组成。然而，由于分子-底物和二聚体-二聚体相互作用之间的相互作用，它们是无定形的，不连续的或高度结晶的。借助单晶X射线分析，面外X射线研究（XRD），选定区域电子衍射（SAED）和原子力显微镜（AFM），分子结构，薄膜有序，可以建立空穴传输能力。将迁移率值与Bassler的无序电荷传输理论进行了比较，并基于DFT计算和单晶结构提出了膜生长机制。结果表明，通过精心调节庞大的取代基和高偶极性，可以实现紧密的中心对称堆积，具有紧密但紧密的π堆积排列。这为空穴提供了二维渗流途径，最终导致载流子迁移率高达0.18 cm〜2 V〜（-1）s〜（-1）。

著录项

  • 来源
    《Advanced Functional Materials》 |2015年第1期|44-57|共14页
  • 作者

    Andreas Liess; Lizhen Huang; Alhama Arjona-Esteban; Aifeng Lv; Marcel Gsaenger; Vladimir Stepanenko; Matthias Stolte; Frank Wuerthner;

  • 作者单位

    Univesitaet Wuerzburg Institut fuer Organische Chemie & Center for Nanosystems Chemistry Am Hubland, 97074,Wuerzburg, Germany;

    Universitaet Wuerzburg Institut fuer Organische Chemie & Center for Nanosystems Chemistry Am Hubland, 97074, Wuerzburg, Germany;

    Universitaet Wuerzburg Institut fuer Organische Chemie & Center for Nanosystems Chemistry Am Hubland, 97074, Wuerzburg, Germany;

    Universitaet Wuerzburg Institut fuer Organische Chemie & Center for Nanosystems Chemistry Am Hubland, 97074, Wuerzburg, Germany;

    Universitaet Wuerzburg Institut fuer Organische Chemie & Center for Nanosystems Chemistry Am Hubland, 97074, Wuerzburg, Germany;

    Universitaet Wuerzburg Institut fuer Organische Chemie & Center for Nanosystems Chemistry Am Hubland, 97074, Wuerzburg, Germany;

    Universitaet Wuerzburg Institut fuer Organische Chemie & Center for Nanosystems Chemistry Am Hubland, 97074, Wuerzburg, Germany;

    Universitaet Wuerzburg Institut fuer Organische Chemie & Center for Nanosystems Chemistry Am Hubland, 97074, Wuerzburg, Germany;

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

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号