Molecular stacking induced by intermolecular C-H⋯N hydrogen bonds leading to high carrier mobility in vacuum-deposited organic films

Daisuke Yokoyama, Hisahiro Sasabe, Yukio Furukawa, Chihaya Adachi, Junji Kido

    Research output: Contribution to journalArticle

    101 Citations (Scopus)

    Abstract

    Simple bottom-up fabrication processes for molecular self-assembly have been developed for the construction of higher-order structures using organic materials, and have contributed to maximization of the potential of organic materials in chemical and bioengineering. However, their application to organic thin-film devices such as organic light-emitting diodes have not been widely considered because simple fabrication of a solid film containing an internal self-assembly structure has been regarded as difficult. Here it is shown that the intermolecular C-H···N hydrogen bonds can be simply formed even in vacuum-deposited organic films having flat interfaces. By designing the molecules containing pyridine rings properly for the intermolecular interaction, one can control the molecular stacking induced by the intermolecular hydrogen bonds. It is also demonstrated that the molecular stacking contributes to the high carrier mobility of the film. These findings provide new guidelines to improve the performance of organic optoelectronic devices and open up the possibilities for further development of organic devices with higher-order structures.

    Original languageEnglish
    Pages (from-to)1375-1382
    Number of pages8
    JournalAdvanced Functional Materials
    Volume21
    Issue number8
    DOIs
    Publication statusPublished - 2011 Apr 22

    Fingerprint

    Carrier mobility
    carrier mobility
    Hydrogen bonds
    Vacuum
    hydrogen bonds
    organic materials
    Self assembly
    vacuum
    self assembly
    bioengineering
    Thin film devices
    Fabrication
    fabrication
    Organic light emitting diodes (OLED)
    optoelectronic devices
    Optoelectronic devices
    Pyridine
    pyridines
    light emitting diodes
    Molecules

    Keywords

    • Carrier mobilities
    • Intermolecular hydrogen bonds
    • Molecular orientation
    • Organic light-emitting diodes
    • Self-assembly

    ASJC Scopus subject areas

    • Biomaterials
    • Electrochemistry
    • Condensed Matter Physics
    • Electronic, Optical and Magnetic Materials

    Cite this

    Molecular stacking induced by intermolecular C-H⋯N hydrogen bonds leading to high carrier mobility in vacuum-deposited organic films. / Yokoyama, Daisuke; Sasabe, Hisahiro; Furukawa, Yukio; Adachi, Chihaya; Kido, Junji.

    In: Advanced Functional Materials, Vol. 21, No. 8, 22.04.2011, p. 1375-1382.

    Research output: Contribution to journalArticle

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    AU - Kido, Junji

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