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Reference Number EP/H015701/1
Title Probing and enhancing charge generation and transport in solid-state dye-sensitized solar cells
Status Completed
Energy Categories RENEWABLE ENERGY SOURCES(Solar Energy, Photovoltaics) 100%;
Research Types Basic and strategic applied research 100%
Science and Technology Fields PHYSICAL SCIENCES AND MATHEMATICS (Physics) 100%
UKERC Cross Cutting Characterisation Not Cross-cutting 100%
Principal Investigator Dr LM Herz
No email address given
Oxford Physics
University of Oxford
Award Type Standard
Funding Source EPSRC
Start Date 01 January 2010
End Date 31 March 2014
Duration 51 months
Total Grant Value £739,361
Industrial Sectors Energy
Region South East
Programme Energy : Physical Sciences
 
Investigators Principal Investigator Dr LM Herz , Oxford Physics, University of Oxford (99.998%)
  Other Investigator Dr MB Johnston , Oxford Physics, University of Oxford (0.001%)
Dr hjs Snaith , Oxford Physics, University of Oxford (0.001%)
  Industrial Collaborator Project Contact , BASF AG, Germany (0.000%)
Project Contact , Chemicrea Inc., Japan (0.000%)
Web Site
Objectives
Abstract Photovoltaic devices that harvest the energy provided by the sun have great potential as clean, renewable sources of electricity. Despite this, uptake of photovoltaic energy generation has not been strong, largely because devices based on many current technologies are still too expensive. One promising alternative is given by organic-inorganic hybrid cells based on dye-sensitised metal oxide mesoporous electrodes, which are cheaper to produce and have reached power conversion efficiencies of over 11%. However, there remain concerns about the incorporated redox active liquid electrolyte, presenting the possibility of toxic, corrosive chemicals leakage. Recent research into replacing the liquid electrolyte with a solid-state hole-transporter has yielded cells with up to 5% power conversion efficiency. Here we propose a structured research programme that will lead to increases in the power conversion efficiencies of all-solid-state dye-sensitized solar cells (SDSCs) towards that of their electrolyte-containing counterparts. In particular, we will use a new approach in order to establish criteria for optimization of essential parameters such as the nanoscale morphology of the electrodes, the charge-mobility for the hole-transporter and the energetic level arrangement at the interface. The study will combine device measurements with a range of time-resolved spectroscopic investigations to deduce how each change to the system affects individual photophysical processes(such as photo-excited electron transfer) in the material, and how this translates into efficiency of device operation. Work will be based on a careful selection of material components that allow tuning of only one particular property at a time. This combined new approach will not only allow significant improvements to be made to specific SDSC designs, but also deliver a more general framework for the exact requirements of successful optimization approaches
Publications (none)
Final Report (none)
Added to Database 04/01/10