UK EU Referendum 23 June 2016Click here for a video on reasons on why the UK should have remained in the EU. See also Statement from Venki Ramakrishnan, President of the Royal Society and, on 20 June, EU referendum: An open letter to UK voters from leaders of 103 British universities
Current Research TopicsA more detailed description of my research and publications are given on my Device modelling webpage
My research groupIan Thompson, organic devices (Extmos EU project)
Dibya Ghosh, perovskite solar cells (EoCoE EU project)
Matthew Wolf, perovskite solar cells (Supersolar EPSRC project)
James Cave, perovskite solar cells (CDT-PV)
Tom McManus, organic transport and proteins (University HPC studentship)
Alex Smith, organic solar cells (CDT-PV)
Chris Morris-Knox Novel p-type transparent conducting oxides (CDT-PV)
Click here to access my TEDX talk given at the University of Bath in 2014, a 16 minute video where I describe my research on new organic light emitting diodes, photovoltaic devices and novel solar photovoltaic cells
Solar cellsSolar cells are devices that produce electricity from the sun's energy through the creation and subsequent dissociation of an exciton. The way in which they work is similar to natural photosynthesis.
What types are there?There are several solar cell technologies and in each, the light-active component and other cell materials are different.
Click here to access a 6 minute video where the motivation for my research on cheaper, flexible and sustainable solar cells is discussed with Petra Cameron and Aron Walsh.
Organic solar cells consist of layers and/or blends of organic materials. Organic Photovoltaic Cell, OPV
Hybrid solar cell These solar cells consist of a mixture of organic and inorganic materials.
With Petra Cameron's group in the Department of Chemistry, we have a large research effort on perovskite solar cells
Image of perovskite tin cells courtesy of University of Oxford.
Useful LinksThe Solar Spark solar power education website
Protein simulationThe relationship between the structure of a protein and its function is vital to understanding how molecules give rise to biological effects. The flexibility and dynamics of proteins in many cases drives their functional activity. We are studying for example the enzyme citrate synthase shown below responsible for catalysing the first reaction of the citric acid cycle. The temperature variation of its rigidity influences extremophiles, organisms who thrive in different temperature regimes.
3.5 year studentship at Bath starting Oct 2018This studentship is funded by the GW4 BioMed Doctoral Training Partnership, DTP The studentship is on Modelling structure and interactions of antibodies and antigens . Knowledge of antibody structure is vital for medicine and biotechnology. Fast, accurate protocols incorporating flexibility and antibody-antigen binding will be developed and validated against structures from experiment. Modelling is aided for antibodies by division into highly variable antigen binding loops and a relatively invariant scaffold.
The supervisory team in addition to myself is
Dr Marc Van der Kamp, Bristol Biochemistry ,
Professor Jean van den Elsen, Bath Biology & Biochemistry,
Dr Susan Crennell, Bath Biology & Biochemistry.
The studentship is available to those who have been resident in the UK for at least 3 years. Applications can be made on the GW4 Biomed DTP website in the period 24 Sept to 24 Nov 2017 and successful candidates following interviews Dec 2017 to Jan 2018 will be notified 30 Jan 2018. For further enquiries please contact me by email, a.b.walker"at"bath.ac.uk
Organic Materials and Devices
We're all taught at school that plastic is an insulator, but some carbon-based small molecules and polymers do conduct electricity. Unlike silicon-based electronics, organic electronics are relatively low performance but cheap and flexible. And when they conduct, they can light up, click here for my article on lighting based on organic light emitting diodes (OLEDs), be used in displays, or convert light to current in photovoltaics.
Click here to access the press release on the Horizon2020 research project Extmos, EXTended Model of Organic Semiconductors, that I coordinate. The motivation for my research on flexible and printable electronics is discussed with Enrico Da Como. A 3 minute video has been filmed on the Extmos research that can be seen on that website and can also be found by clicking here.
What devices are there?
Organic Field Effect Transistors
used in smart packaging, brand protection, security, smartcards, distribution tagging and Radio Frequency Identification Devices, interactive media, disposable electronics, and (flexible) display backplanes.
Incorporation of flexible electronics in textiles can be used in
clothing for the public services.
Organic devices are being developed that can restore or replace functions of the human body through managing the interface between electronic devices and cells, tissues and organs.
At the University of Bath, I work with the Molecular Optolectronics group headed by Dr Enrico Da Como.
Useful LinksIDTechEx Printed electronics news
OLED-Info OLED TVs, displays and lighting