| EPSRC Reference: |
GR/R05116/01 |
| Title: |
Optical Excitations In Semiconducting Polymers |
| Principal Investigator: |
de Mello, Professor J |
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| Department: |
Chemistry |
| Organisation: |
Imperial College London |
| Scheme: |
Fast Stream |
| Starts: |
01 September 2000 |
Ends: |
28 February 2003 |
Value (£): |
59,865
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| EPSRC Research Topic Classifications: |
| Complex fluids & soft solids |
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Summary on Grant Application Form |
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The nature of the primary photo-excitation is of central importance in the field of polymer semiconductor research and has far reaching implications for a wide range of electronic devices, including emissive displays, photocells and electrically pumped organic lasers. The strenght of binding between photoexcited electron-hole pairs (the excition binding energy) is particularly important in this respect as it places theoretical limits on the efficiencies of many optoelectronic devices.To date, measurements of the binding energy have been inconclusive, and its magnitude is the subject of continuing debate. Field-induced fluorescence quenching measurements have been successfully used to investigate binding energy in a wide range of molecular materials, but attempts to extend their use to polymeric systems have proved problematic. In this proposal, we describe a revised approach to fluorescence quenching which, in conjunction with electroabsorption spectroscopy, offers a reliable means of investigating excition binding energy in polymeric systems.The findings of the research programme are expected to provide a detailed insight into the ways in which the structural conformational properties of the host polymer determine the properties of the excition. This in turn should provide a strong basis for improving the performance of optoelectronic devices by chemically 'tuning' the properties of the polymer. (Key words:Optoelectronic devices)
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Key Findings |
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Potential use in non-academic contexts |
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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 |