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Research Fellows Directory

Martin Kuball

Professor Martin Kuball

Research Fellow


University of Bristol

Research summary

Professor Kuball leads the Center for Device Thermography and Reliability (CDTR), an interdisciplinary research centre, at the University of Bristol. His research focuses on wide bandgap semiconductors (GaN, SiC, etc) for microwave and power electronic applications. Research is focused on device thermal management, device performance and reliability. We work with external partners and industrial stakeholders who fabricate devices. The research includes the development and use of advanced thermal testing techniques, such as Raman thermography and transient reflectance, to obtain detailed knowledge of the channel temperature in the devices which significantly impacts device reliability. Integration of these materials with diamond for optimal thermal management is a key current area of research which includes research on phonon transport across grain boundaries and interfaces. Degradation of the electronic devices is impacted by this raised device temperature, however, also high electrical field and high energy carriers. New electrical techniques are being developed to monitor the generation of defects, in particular point defects, and to build models for the physics of device failure as well as to gain a good physical understanding how the devices really work and can be optimized for key applications. The experimental work is complemented by thermal, thermo-mechanical and electrical drift diffusion simulations. The CDTR consists of 20 researchers and is funded by Royal Society, EPSRC, TSB, EDA, ESA, ONRG, DARPA and other funders including industry.

Grants awarded

Gallium Nitride Diamond Electronics - Novel Thermal Management Concepts

Scheme: Wolfson Research Merit Awards

Dates: Jan 2015 - Dec 2019

Value: £50,000

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