Graduate Research – University of Maryland

SiC MOSFETs Project (July 2011 – Present)

  • Structural and chemical characterization of the transition layer at the SiC/SiO2interface in SiC MOSFET devices
  • Project details:
    • Aims to understand the nature of the interface between SiC and its oxide in SiC electronics and reveal the origin of electronically active defect-states (traps)
    • Use high resolution transmission electron microscopy and electron energy loss spectroscopy (EELS) to investigate the effects of various post-processing techniques on SiC-based devices
    • Fabricate TEM specimens using focused ion beam (FIB-SEM) techniques at NIST
    • Manuscript describing systematic effect of NO-annealing published in Journal of Applied Physics (download here)
      • J. Taillon, et al. “Systematic structural and chemical characterization of the transition layer at the interface of NO-annealed 4H-SiC/SiO2 metal-oxide-semiconductor field-effect transistors,” J. Appl. Phys. 113, 044517 (2013). Copyright 2013 American Institute of Physics. This article may be downloaded for personal use only. Any other use requires prior permission of the author and the American Institute of Physics.  http://dx.doi.org/10.1063/1.4789924
    • Presented results in oral presentations at 2012 and 2013 Annual SiC MOS Workshop (College Park, MD), 2012 and 2013 MRS Fall Meeting (Boston, MA), and 2013 APS March Meeting (Baltimore, MD)

Mechanistic Enhancement of Solid Oxide Fuel Cells (September 2012 – Present)

  • FIB-SEM 3D reconstruction of SOFC cathode and electrolyte materials
  • Project details:
    • Aims to improve SOFC cathode durability by determining microstructural changes that occur with environmental exposure
    • SOFC microstructure characterization is performed via a 3D reconstruction process of FIB-SEM images (see this article)
    • Further cathode characterization is achieved using electron diffraction and EELS techniques in the TEM

ZnO Nanowires in Hybrid Photovoltaics (July 2011 – March 2012)

  • Optimization of fabrication conditions for ZnO nanowire arrays to be used in hybrid photovoltaics
  • Project details:
    • Hybrid photovoltaics (combining organic and inorganic materials) currently exhibit poor charge separation, limiting efficiency
    • Using oriented liquid crystals as the organic material improves carrier conductivity, and ZnO nanoparticles have been shown to improve orientation of liquid crystal in these devices (ref), but using nanowires in place of nanoparticles would improve electron conduction
    • This work aims to determine whether nanowires would have the same orientation effect on the liquid crystal
    • ZnO nanowires are grown via chemical vapor deposition, and a number of fabrication conditions have been optimized, but uniform nanowire arrays remain elusive
    • Presented progress in poster presentation at 2012 MRS Fall Meeting (Boston, MA)

Undergraduate Research – Cornell University

Materials Science and Engineering Senior Research Thesis (August 2010 – May 2011)

  • Ab Initio Discovery of Novel Crystal Structure Stability in Barium and Sodium-Calcium Compounds Under Pressure
  • Project Details:
    • Computational study of elemental barium and sodium-calcium binary alloys under high pressure
    • Learned to use a wide range of computational materials science tools (VASP, ISOTROPY, VESTA, etc.)
    • Discovered novel crystal structure of barium using an in-house genetic algorithm search technique and density functional theory calculations
    • Helped improve the efficacy of the group’s crystal structure search methods and developed programs to assist in the processing of results
    • Prepared a conference manuscript, as well as an oral and poster presentation
  • Awards and Honors:
    • Awarded “Best overall Senior Thesis” by panel of faculty judges
    • Won 1st prize in the Senior Thesis Poster Competition, as judged by the MSE faculty
  • Side Projects:
    • Created LaTeX template for use by future students in the Senior Thesis Program (Download: .tex .pdf)
Photo of me in NISPLab
    • On the JEOL 2100F field emission TEM at NISPLab, UMD
    • Joshua Taillon
    • B.S./M.S. Materials Science and Engineering
    • Ph.D. Candidate in Materials Science and Engineering, Expected Early 2016
    • Address:
    • 1240 Kim Engineering Building (#225)
      Materials Science and Engineering
      University of Maryland College Park
      College Park, MD 20742-2115
    • Email: jtaillon@umd.edu
      Phone: (301) 405-3314
      Outlook: vCard
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