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Gallium Oxide (Ga2O3) – diamond device integration – The new world of a low carbon economy

  • Full or part time
  • Application Deadline
    Friday, January 31, 2020
  • Competition Funded PhD Project (European/UK Students Only)
    Competition Funded PhD Project (European/UK Students Only)

Project Description

You will be based within the Centre for Device Thermography and Reliability (CDTR), an internationally leading research centre focused on next generation semiconductor electronic materials and devices. GaN based electronic devices have transformed communication applications e.g. the upcoming 5G as well as power switch applications for a more carbon neutron society. However, GaN has its limits, for example it cannot operate at voltages >1kV but >10kV are needed for example for power transmission lines, or applications in aerospace engines for full electrical planes. A new opportunity has emerged with Gallium Oxide (Ga2O3), a material of 4.9eV bandgap (even higher than that of GaN), and with AlN (6eV bandgap). However, there are major challenges. For example Ga2O3 has a thermal conductivity of <1 W/mK. Why does thermal conductivity matter ? Increased temperature rises not only degrades device performance but also results in early device failure due to excessive device temperatures. This can be overcome by integrating these new materials with diamond, the highest thermal conductivity material known to mankind. There are major challenges to overcome as the crystal structure of diamond and e.g. Ga2O3 are dissimilar. We aim to transform semiconductor electronics by achieving this integration and studying the performance of these materials and devices to reduce the UK carbon footprint. This work involves collaboration with NICT Japan, UC Santa Barbara USA. Other projects are also available including on 2D materials, phonon transport phenomena, electrical transport.

The CDTR with its 20+ researchers is active in many EU, US, and UK research programmes, and is funded by the UK Engineering and Physical Sciences Research Council (EPSRC), the US Defense Advanced Research Projects Agency, the European Space Agency and other funding agencies as well as by industry. It is led by Professor Kuball, Fellow or MRS, SPIE, IET and IoP.

How to apply: Please make an online application for this project at Please select Physics PhD on the Programme Choice page. You will be prompted to enter details of this specific project in the ‘Research Details’ section of the form.

Funding Notes

UK or EC nationality preferred, but exceptional world-wide candidates will also be considered.


Include in your application names and contact addresses of three referees.

How good is research at University of Bristol in Physics?

FTE Category A staff submitted: 44.15

Research output data provided by the Research Excellence Framework (REF)

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