Light-emitting poly(dendrimer)s

Jack P. Gunning, Kevin A. Knights, Jean Charles Ribierre, Ruth E. Harding, Jack W. Levell, Paul L. Burn, Ifor D.W. Samuel

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

    1 Citation (Scopus)

    Abstract

    Organic light-emitting diodes (OLEDs) have great potential for displays and lighting applications. For large area displays the ideal materials would be both phosphorescent and solution processible. These requirements mean that the materials need to be able to be patterned and the most advanced method for forming pixelated displays is inkjet printing. Light-emitting phosphorescent dendrimers have given high efficiency monochrome displays with the emitting layer deposited by spin-coating. However, the viscosity of the dendrimer solutions is insufficient for inkjet printing. We report the development of a new class of light-emitting materials, namely poly(dendrimers) in which a green emissive phosphorescent dendrimer is attached to a poly(styrene) backbone. Free radical polymerization of a dendrimer-styrene monomer gave a poly(dendrimer) with a weight average molecular weight of 24000 and a polydispersity of 3.6. A dilute solution of the dendrimer had a viscosity 15% higher than the neat solvent. Comparison of the photophysical studies of the poly(dendrimer) versus a model monomer dendrimer showed that the PL spectrum was broader and red-shifted, and the PL quantum yield around 50% lower. This was attributed to intermolecular interactions of the emissive dendrimers, which are held closely together on the polymer backbone.

    Original languageEnglish
    Title of host publicationOrganic Light Emitting Materials and Devices XII
    DOIs
    Publication statusPublished - 2008
    EventOrganic Light Emitting Materials and Devices XII - San Diego, CA, United States
    Duration: Aug 10 2008Aug 12 2008

    Publication series

    NameProceedings of SPIE - The International Society for Optical Engineering
    Volume7051
    ISSN (Print)0277-786X

    Other

    OtherOrganic Light Emitting Materials and Devices XII
    CountryUnited States
    CitySan Diego, CA
    Period8/10/088/12/08

    All Science Journal Classification (ASJC) codes

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

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