I am a physicist with interests in understanding, modeling and developing advanced materials, processes and device concepts for nanoelectronics and photovoltaic technology.
Together with my research team I have developed some of the leading process simulation models for Technology Computer Aided Design (TCAD) of Si and SiGe based devices. Our models, which are routinely implemented in industry-standard TCAD tools, have been shown to predict down to 32 nm CMOS device parameters with minimal calibration. They are now being used by industry worldwide to explore and develop 22 nm technology and beyond. Further model development includes a new continuum theory of charged species diffusion in solids, which will allow increased simulation accuracy.
We are currently applying these models to full (process and device TCAD) evaluations of commercial c-Si photovoltaic technology aiming at cost neutral enhancements of conversion efficiency. This work is complemented by experimental and modelling studies of future generation PV, in particular new nanostructured material combinations to enhance efficiency and support cost reductions for thin film solar cells.
Physical models for electrically active defects in Si and Ge based materials and devices are being developed in the EU FP7 ATEMOX project. Multi-scale (first-principles and continuum) models for gettering processes in advanced solar cells are being developed in collaboration with Newcastle colleagues and an international technology partner.
MA (Oxford University), DPhil (Oxford University)
Materials Research Society, UK Institute of Phyics
Materials Research Society Meeting Chair 2001
Royal Academy of Engineering Research Chair
International committee-elected professorship at Aarhus University
My principal research interests are in the structural and thermodynamic properties of condensed matter: diffusion, defects, nucleation, nonequilibrium phase transformations and self organisation in electronic and opto-electronic materials. Active research outputs include enhancements to fundamental scientific understanding through theory and experiment, and advances in technology simulation models used in state-of-the-art commercial TCAD tools. A key application is silicon-based materials and processes for low cost, high efficiency photovoltaics.
Modelling that captures key elements and interactions within complex systems.
Research management and active research in a wide network of international and UK collaborations
Recognized world leading expertise in integrated TCAD (predictive process and device simulation) with a recently developed focus on PV technology. This provides the PV industry with a vitally important fast track to efficiency enhancement (see for example a recent review article from Newcastle in Photovoltaics International, Edition 12)