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Group Member

David Caffrey

Postdoctoral Research Fellow
School of Physics, CRANN

David Caffrey

David Caffrey is a postdoctoral research fellow working with the applied physics research group to investigate low cost and sustainable transparent conducting oxides (TCOs) for energy and industrial device applications. His current work focuses on both the growth and optimisation of these materials and the use of multilayer structures to enhance their properties.


  • Growth and characterisation of Transparent Conducting Oxides (ZnO:X, a-ZnSnO)
  • Emphasis on materials which are environmentally sustainable and low cost
  • Screening for, development and understanding of effective p-type TCOs
  • Developing new nanoscale multilayer systems to alter or improve the bulk properties of oxide materials


  • Vacuum deposition of oxide materials (Magnetron sputtering, Pulsed laser deposition)
  • Atmospheric chemical synthesis of oxide materials (spray pyrolysis)
  • Vacuum systems
  • Electrical characterisation
  • Optical analysis
  • X-ray Diffraction and reflection

David Caffrey joined the APRG research group in 2012 to do a PhD under a TCD postgraduate student award. In 2016 he submitted and defended his PhD thesis on the use of nanoscale multilayer oxide structures to tune the refractive index of materials. Since then Dr. Caffrey has continued as a postdoctoral research fellow with the group specialising in the development and understanding of low-cost and sustainable transparent conducting oxides (TCOs) for energy and device application.