| EPSRC Reference: |
GR/M72135/01 |
| Title: |
THE ROLE OF TRAP STATES IN NANOCRYSTALLINE TIO2 ELECTRONIC DEVICES |
| Principal Investigator: |
Nelson, Professor J |
| Other Investigators: |
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| Department: |
Physics |
| Organisation: |
Imperial College London |
| Scheme: |
Standard Research (Pre-FEC) |
| Starts: |
01 October 1999 |
Ends: |
31 March 2003 |
Value (£): |
173,335
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| EPSRC Research Topic Classifications: |
| Materials Characterisation |
Solar Technology |
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| EPSRC Industrial Sector Classifications: |
| Electronics |
No relevance to Underpinning Sectors |
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Summary on Grant Application Form |
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Dye-sensitised solar cells are one of the most promising options for low cost energy supply. In these novel devices charge separation occurs at the junction between a nanoporous, nanocrystalline Ti02 electrode and redox-active electrolyte. One factor currently limiting the photovoltaic conversion efficiency is the kinetics of electron transport and transfer within the disordered film.Both electron transport and charge recombination in these films appear to be dominated by a high density of trap states. The aim of this proposal is to characterise and measure the distribution of these trap states (d.o.s) in both model systems and functioning devices and to correlate these observations with device function.The d.o.s can be derived from measurements of potential step chronoamperometry and a.c. impedance spectroscopy. We will incorporate the measured d.o.s into an existing numerical model of dispersive electron transport in the nanocrystallline film. The model can then be applied to a range of steady state and time resolved current measurements and subsequently refined.We are requesting funds for two PhD studentships to pursue the theoretical and experimental aspect of the work and apparatus for capacitance measurements and transient photocurrent measurements.
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Key Findings |
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This information can now be found on Gateway to Research (GtR) http://gtr.rcuk.ac.uk
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Potential use in non-academic contexts |
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This information can now be found on Gateway to Research (GtR) http://gtr.rcuk.ac.uk
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Impacts |
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| Description |
This information can now be found on Gateway to Research (GtR) http://gtr.rcuk.ac.uk |
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Sectors submitted by the Researcher |
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This information can now be found on Gateway to Research (GtR) http://gtr.rcuk.ac.uk
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| Project URL: |
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| Further Information: |
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| Organisation Website: |
http://www.imperial.ac.uk |