Raman and infrared spectroscopy of organic electronic devices

    Research output: Chapter in Book/Report/Conference proceedingConference contribution

    Abstract

    We present Raman and infrared studies on the structures of organic semiconductor thin films used for electronic devices. The Raman spectra of crystalline and amorphous states of an organic semiconductor, N,N′-di-1-naphthaleyl-N,N′-diphenyl-1,1′-biphenyl-4, 4′-diamine (NPD), were measured. These states give rise to slightly different peak positions and widths of each Raman band. Raman images were observed for polycrystalline pentacene films evaporated on a silicon substrate. The structural defects were found in the images of the intensity ratio I 1596/I1533, which reflects the orientation of molecules i.e., crystalline domains. Photoinduced infrared absorption from the composite of regioregular poly(3-dodecylthiphene) and C60 was measured by the difference FT-IR method. The observed absorption is attributable to photogenerated carriers. The action spectra of photoinduced infrared absorption are explained by electron transfer from photogenerated excited states on a polymer chain to C60.

    Original languageEnglish
    Title of host publicationProceedings of SPIE - The International Society for Optical Engineering
    Volume7993
    DOIs
    Publication statusPublished - 2011
    EventICONO 2010: International Conference on Coherent and Nonlinear Optics - Kazan
    Duration: 2010 Aug 232010 Aug 26

    Other

    OtherICONO 2010: International Conference on Coherent and Nonlinear Optics
    CityKazan
    Period10/8/2310/8/26

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    Keywords

    • Infrared
    • Organic light-emitting diode
    • Organic solar cell
    • Organic thin-film transistor
    • Raman

    ASJC Scopus subject areas

    • Applied Mathematics
    • Computer Science Applications
    • Electrical and Electronic Engineering
    • Electronic, Optical and Magnetic Materials
    • Condensed Matter Physics

    Cite this

    Furukawa, Y. (2011). Raman and infrared spectroscopy of organic electronic devices. In Proceedings of SPIE - The International Society for Optical Engineering (Vol. 7993). [799320] https://doi.org/10.1117/12.880237