Energy Materials

At the Laboratory for Energy Materials (LEM) we are interested in making and testing complex materials necessary for energy conversion and storage using innovative methods. It is headed by
Prof Phillip Dale who also leads the doctoral training unit in advanced concepts for photovoltaics.

Currently our research is focused on the preparation and characterization of semiconductor layers for use in solar cells. We try to understand how to convert simple precursor layers into single phase high quality semiconductor materials suitable for devices that can efficiently convert incoming light into electrical power.

  • We are interested in small solar cells for semi-transparent, sensor, and high efficiency applications
  • Semiconductor precursor layers are synthesized electrochemically and by inkjet printing
  • We research both novel semiconductor materials and growth processes




 (1)  We have funding for a new project in semi-transparent photovoltaics (STPV) for use in buildings. The use of glass in buildings is increasing and there is an opportunity to create devices which utilize some of the light for photovoltaic power generation, and some of it for illuminating the interior of the building. The project is in collaboration with the International Iberian Nanotechnology Laboratory  based in Portugal, with plenty of exchange visits expected. We are looking for one post doc who will be responsible for mini module design, optical and electrical simulation, and fabrication.  Please contact or apply here directly. 

(2) We have funding for a post doc position in the area of high speed annealing of compound semiconductors for solar cells. This ambitious highly collaborative inter-disciplinary project involves equipment testing, semiconductor synthesis and characterization. Current annealing times for semiconductor absorber layers are in the range of minutes to hours, and in this project we investigate how to reduce this to the timescale of seconds. Email for more information.



  • August 2019 – New Youtube channel “Energy Balance” launched

    In a new project, we are producing several videos explaining about the earth’s limited energy resources, and how we need to balance our energy consumption with production, in order to live sustainably without causing more global heating. The videos were designed so that they could be understood by everyone, especially for children, not just experts. The first two videos can be found here.

  • July 2019 - Phillip Dale part of the Solar Commission reporting on the role of photovoltaics in the UK

A new report championing the role of solar in the UK energy system, and the extensive expertise and innovation in UK companies and academia, was this week launched at the House of Lords. The report was produced by the Solar Commission and funded by UK Energy Research Centre (UKERC). Phillip Dale was part of this commission, and in addition he wrote a blogpost outlining why research into solar energy is still necessary. The publication was launched to a room of over 70 sector leaders and sustainable energy experts, with Joanna Whittington, director general for energy and security at Department for Business, Energy and Industrial Strategy welcoming the paper, which outlined areas where the UK could use its scientific and technical capabilities to play a leading role in innovation and industrial strategy opportunities in solar power.

  • March 2019 – Collaboration between UL and INL leads to micro solar cells for future light concentration applications



Normal solar cells are large, so that they capture as much light as possible. An alternative concept is to make them very small and use a lens to concentrate light onto them. This has the twin advantages of using less precious semiconductor and also increasing their efficiency. 

In this joint paper between the group of Dr Sadewasser at the INL and Daniel Siopa of our group, we investigated the fabrication of such a small solar cell. Specifically we used electrodeposition to fabricate the part of the solar cell called the semiconductor absorber layer. Electrodeposition enables us to deposit small disks of metals inside an inert template which can then be converted by high temperature annealing into the semiconductor absorber layer. More details of the work can be found here .


Figure: Background image of micro-solar cell, foreground image of device efficiency as a function of illumination concentration factor and short circuit current.


PAST NEWS: click here