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Characterization of Carrier Dynamics in Metal Oxide Nanostructures and Tellurophenes

  • Author / Creator
    Wiltshire, Benjamin D
  • Research was undertaken into the charge carrier dynamics of TiO2 nanotube and nanowire structures, which have potential in many technological applications and are already used in solar cells, OLED’s, photocatalysts, and biomedical applications. Using a combination of Time of Flight, Photoconductivity, IV, CV, and Time Resolved Microwave Conductivity, the charge carrier dynamics of TiO2 nanostructures were measured and later improved upon using a self-assembled monolayer surface for passivation, with mobility improving by a factor of almost 1000. The Time of Flight and Time Resolved Microwave Conductivity are explained in detail and can be used quickly, easily, and with a wide variety of materials to measure important material properties that are difficult to find using other methods. Organic Tellurophenes were also investigated using quantitative photoluminescence (PL) measurements such as quantum yield measurements and time resolved photoluminescence. The Tellurophenes were previously uncharacterized and only available in small quantitites. They were found to have unique properties such as triplet-decay leading to phosphorescent light emission which was tunable and with a relatively high quantum yield. The Tellurophenes were also found to have relatively high carrier mobilities after doping as high as 1.1×〖10〗^(-4) 〖cm〗^2 V^(-1) s^(-1).

  • Subjects / Keywords
  • Graduation date
    2017-11:Fall 2017
  • Type of Item
    Thesis
  • Degree
    Master of Science
  • DOI
    https://doi.org/10.7939/R34X54W70
  • License
    This thesis is made available by the University of Alberta Libraries with permission of the copyright owner solely for non-commercial purposes. This thesis, or any portion thereof, may not otherwise be copied or reproduced without the written consent of the copyright owner, except to the extent permitted by Canadian copyright law.
  • Language
    English
  • Institution
    University of Alberta
  • Degree level
    Master's
  • Department
    • Department of Electrical and Computer Engineering
  • Specialization
    • Microsystems and Nanodevices
  • Supervisor / co-supervisor and their department(s)
    • Shankar, Karthik (Electrical and Computer Engineering)
  • Examining committee members and their departments
    • Daneshmand, Mojgan (Electrical and Computer Engineering)
    • Shankar, Karthik (Electrical and Computer Engineering)
    • Cadien, Kenneth (Chemical and Materials Engineering)