| EPSRC Reference: |
GR/M10168/01 |
| Title: |
ORGANOMETALLIC AND ORGANIC POLYMERS FOR LIGHT EMITTING DEVICES AND PHOTOCELLS |
| Principal Investigator: |
Friend, Professor Sir R |
| Other Investigators: |
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| Project Partners: |
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| Department: |
Physics |
| Organisation: |
University of Cambridge |
| Scheme: |
Standard Research (Pre-FEC) |
| Starts: |
01 June 1998 |
Ends: |
31 May 2001 |
Value (£): |
38,265
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| EPSRC Research Topic Classifications: |
| Materials Characterisation |
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| EPSRC Industrial Sector Classifications: |
| No relevance to Underpinning Sectors |
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| Panel History: |
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Summary on Grant Application Form |
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A key problem in organic LEDs is the 3:1 ratio for the generation of the non-emissive singlet excitons. In previously prepared platinum poly-ynes, emission occurs from the triplet excited state due to the strong spin-orbit coupling induced by the heavy transition metal. Triplet emission for EL diodes is not ideal because the emission is red-shifted by the exchange energy (between singlet and triplet excitons), which is ordinarily large. We have found that it is possible to alter the exchange energy by altering the electronic properties of the organic spacer group between the metal alkynyl units, and there is the potential to reduce the energy to that of thermal energies (by taking advantage of the more extended singlet wavefunction). We wish to explore this potential by designing and synthesising a series of metal poly-ynes which contain donor-acceptor organic heterocycles, measuring the photophysical properties of their polymer films, and fabricating LEDs. Strong spin-orbit coupling, provided by the metals, is necessary to enable measurements of both singlet and triplet excitons, but we plan to transfer this information to synthesis and characterise organic polymers based on the donor-acceptor heterocyclic alkynyls, and fabricate efficient photocells.
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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 |
| Summary |
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| Date Materialised |
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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.cam.ac.uk |