The focus of my research has changed since I began my career as a PhD student investigating the self-assembly of optically active structures – this relatively new field of “Photonics” offered the chance to move towards all-optical computers, superfast telecomsand a plethora of exciting stuff…sadly many challenges still exist in the area. But significant progress has been made, the field has grown and delivered research and commercial success in the UK and Internationally.
The current research themes of my group are summarised below:
Capability in solution and CVD based deposition routes of active layers for photovoltaic applications.
Oxide thin film deposition
Expertise in a wide-range of physical and chemical deposition techniques for thin-film fabrication.
Structural and microstructural characterisation
Extensive background and current activities in structural characterisation (electron and X-ray diffraction, electron microscopy, atomic force microscopy).
Measuring charge transport in oxide semiconductors
Experience in thin-film measurements techniques, particularly involving field effect transistors (FETs) and Hall effect.
Optoelectronic properties of thin films
Probing conductivity/resistivity measurements in functional thin films (4-probe, Hall), work-function determination (Kelvin probe) and defect type (photoluminescence).
Novel deposition and processing techniques for oxide:organic semiconductors
Developing bespoke deposition apparatus for the controlled growth of oxide and organic semiconductors.
Device fabrication (photovoltaic, light emitting diode, thin film transistor)
Reliant on working devices to probe the influence of processing and composition on measured properties. Expertise in the fabrication and characterisation of a wide-range of optoelectronic devices (photovoltaic, LED, TFT)
My research is focussed on combining the above activities into a coherent research program. Particularly my motivation is on studying and understanding the interplay between composition, structure and processing on thin-film properties. Of particular interest is the role of defects, both electronic and structural, on measured device and thin film characteristics. It is critical that these variables are not treated in isolation nor that it can be assumed that identical materials will perform and degrade similarly in dissimilar environments.
RSC-CCS Symposium on Organic and Molecular Materials for Light Harvesting, Chengdu UniversityTianjin University University of Chemical TechnologyBeijingChina, 2012
Oxides in Plastic Electronics, Nagoya Institute of Technology (NITech), Nagoya, Japan, 2012
The role of metal oxides in plastic electronics, Centre for Plastic Electronics, 2nd Annual CPE WInter School, Bergün, Switzerland, 2012
Optimising the morphology of hybrid photovoltaic devices, King Abdullah University o Science and Technology, Thuwal, Kingdom of Saudi Arabia, 2011
Morphology and structure control of hybrid photovoltaic active layers, Oxford University, Condensed Matter Physics, Department of Physics, 2011
The role of hybrid nanostructures in photovoltaic development, Eidgenössische Technische Hochschule (ETH), Zurich, Switzerland, 2011
Developing efficient hybrid photovoltaics, Tyndall National Institute, Cork, Ireland, 2011
Developing hybrid (oxide: organic) photovoltaics, Centre for Plastic Electronics Symposium 2010, Imperial College London, 2010
Hybrid Photovoltaic Heterostructures: Understanding Planar Systems and Developing Nanostructured Devices., International Forum on Clean Energy and Green Economy, Ordos, China, 2010
Research Student Supervision
Costas,J, Nanostructured hybrid LEDs
Downing,J, Structured Inorganic-Organic Hybrid Photovoltaics
Franklin,JB, Solution Processing Methods for ZnO/CuPc Hybrid Photovoltaic Devices
Hewlett,R, Hybrid Electronics
Lavergne,M-A, Crystallisation studies of polymer thin films on ZnO (Feb-Jul 2010)
Ling,Z, Novel fabrication routes for large area colloidal crystals (Meng Oct 2010-Jun 2011)
Philpott,A, Synthesis of Inverse Opal Nanostructures for Photovoltaic Applications (Meng Oct 2009-Jun 2010)
Yong,A, Water purification and energy generation