• Login
    View Item 
    •   SMARTech Home
    • Center for the Science and Technology of Advanced Materials and Interfaces (STAMI)
    • STAMI-COPE (Center for Organic Photonics and Electronics)
    • STAMI-COPE Distinguished Lecture Series
    • View Item
    •   SMARTech Home
    • Center for the Science and Technology of Advanced Materials and Interfaces (STAMI)
    • STAMI-COPE (Center for Organic Photonics and Electronics)
    • STAMI-COPE Distinguished Lecture Series
    • View Item
    JavaScript is disabled for your browser. Some features of this site may not work without it.

    Disorder-Order Transitions in p-Conjugated Polymers

    Thumbnail
    View/Open
    kohler.mp4 (527.9Mb)
    kohler_videostream.html (962bytes)
    Date
    2016-12-02
    Author
    Köhler, Anna
    Metadata
    Show full item record
    Abstract
    The aggregation of p-conjugated materials significantly impacts on the photophysics, and thus on the performance of optoelectronic devices. Nevertheless, we know comparatively little about the laws governing aggregate formation of p-conjugated materials from solution. In this talk, I shall compare, discuss and summarize how aggregates form for three different types of compounds, that is, homopolymers, donor-acceptor type polymers and low molecular weight compounds. To understand how aggregates form, we employ temperature dependent optical spectroscopy, which is a simple yet powerful tool for such investigations. I shall discuss how optical spectra can be analysed to identify distinct conformational states and to obtain quantitative information on changes in the inter-chain coupling, the conjugation length and the oscillator strength upon aggregate formation. We find aggregate formation to proceed alike in all these compounds by a coil-to-globule like first order phase transition. Notably, the chain expands before it collapses into a highly ordered dense state. I will address the role of side chains and the impact of changes in environmental polarization.
    URI
    http://hdl.handle.net/1853/56149
    Collections
    • STAMI-COPE Distinguished Lecture Series [2]

    Browse

    All of SMARTechCommunities & CollectionsDatesAuthorsTitlesSubjectsTypesThis CollectionDatesAuthorsTitlesSubjectsTypes

    My SMARTech

    Login

    Statistics

    View Usage StatisticsView Google Analytics Statistics
    facebook instagram twitter youtube
    • My Account
    • Contact us
    • Directory
    • Campus Map
    • Support/Give
    • Library Accessibility
      • About SMARTech
      • SMARTech Terms of Use
    Georgia Tech Library266 4th Street NW, Atlanta, GA 30332
    404.894.4500
    • Emergency Information
    • Legal and Privacy Information
    • Human Trafficking Notice
    • Accessibility
    • Accountability
    • Accreditation
    • Employment
    © 2020 Georgia Institute of Technology