University of SaskatchewanHARVEST
  • Login
  • Submit Your Work
  • About
    • About HARVEST
    • Guidelines
    • Browse
      • All of HARVEST
      • Communities & Collections
      • By Issue Date
      • Authors
      • Titles
      • Subjects
      • This Collection
      • By Issue Date
      • Authors
      • Titles
      • Subjects
    • My Account
      • Login
      JavaScript is disabled for your browser. Some features of this site may not work without it.
      View Item 
      • HARVEST
      • Electronic Theses and Dissertations
      • Graduate Theses and Dissertations
      • View Item
      • HARVEST
      • Electronic Theses and Dissertations
      • Graduate Theses and Dissertations
      • View Item

      The Synthesis and Characterization of Bisisoindigo Polymers with Electron-Deficient Comonomers for Applications in Organic Electronics

      Thumbnail
      View/Open
      BENNETT-THESIS-2020.pdf (4.462Mb)
      Date
      2020-06-02
      Author
      Bennett, Raymond N.
      Type
      Thesis
      Degree Level
      Masters
      Metadata
      Show full item record
      Abstract
      Organic electronic materials can be used to make low cost, lightweight, and flexible electronic devices that are not possible with traditional inorganic semiconductors. New semiconductors with improved properties will be required to commercialize these devices. This thesis describes the synthesis of new conjugated polymers using the bisisoindigo structure coupled with electron-deficient thiophene dioxide or benzothiadiazole comonomers. These materials combine a core-expanded isoindigo structure with a polymer design that uses all electron-deficient comonomers. The synthesis of thiophene dioxide-containing polymers was attempted through both the synthesis of thiophene dioxide monomers and through post-polymerization modification. Bisisoindigo polymers with a benzothiadiazole comonomer were synthesized using the Stille reaction. The optoelectronic and physical properties of these polymers were characterised, and the materials were applied in organic field effect transistors (OFETs). Ambipolar device performance was observed in OFETs with hole and electron mobilities up to 4.0 x 10-3 cm2 V-1 s-1 and 1.4 x 10-3 cm2 V-1 s-1 respectively. Additionally, proper selection of OFET source and drain electrodes produced devices with improved threshold voltages by improving energy alignment between the polymer frontier molecular orbital energies and the contact metal.
      Degree
      Master of Science (M.Sc.)
      Department
      Chemistry
      Program
      Chemistry
      Supervisor
      Kelly, Timothy L.
      Committee
      Burgess, Ian J.; Chang, Gap Soo
      Copyright Date
      April 2020
      URI
      http://hdl.handle.net/10388/12874
      Subject
      Bisisoindigo
      Conjugate polymers
      Organic field effect transistors
      OFETs
      Organic electronics
      Collections
      • Graduate Theses and Dissertations
      University of Saskatchewan

      University Library

      © University of Saskatchewan
      Contact Us | Disclaimer | Privacy