| EPSRC Reference: |
GR/M69982/01 |
| Title: |
STUDY OF NANOCRYSTAL-POLYMER COMPOSITES FOR BLUE LIGHT EMITTING DIODES |
| Principal Investigator: |
Kelly, Professor S |
| Other Investigators: |
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| Researcher Co-Investigators: |
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| Project Partners: |
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| Department: |
Physics |
| Organisation: |
University of Hull |
| Scheme: |
Standard Research (Pre-FEC) |
| Starts: |
01 October 1999 |
Ends: |
30 September 2002 |
Value (£): |
173,020
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| EPSRC Research Topic Classifications: |
| Materials Synthesis & Growth |
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| EPSRC Industrial Sector Classifications: |
| Aerospace, Defence and Marine |
Chemicals |
| Electronics |
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Summary on Grant Application Form |
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Novel nanocrystals of ZnTe coated with a MgTe shell will be incorporated into conducting polymer structures for high brightness blue light emitting diodes (LEDs). Such nanocrystals will have a bandgap that can be tuned between 400 and 500 nm by choice of nanocrystal size and shell thickness. The distinctive feature of the tellurides is their low work function when compared with the other wide bandgap II-VI compounds of sulphur and sellenium. Importantly the low work function minimises the hole transport barrier from the hole conducting polymer layer into the nanocrystals and should give the most efficient hole injection into any of the wide bandgap nanocrystals. The LEDs will be formed by spin coating a hole conducting polymer layer onto indium-tin-oxide (ITO) coated glass before spin coating the nanocrystals from suspension and contacting with a low work function metal such as calcium. Initially proprietary polymers and polymers from DERA will be used, but later in-house polymers with improved mobilities will become available as part of two current EPSRC contracts, leading to improved brightness of the LEDs. There are no previous reports of ZnTe or ZnTe/MgTe nanocrystals for optoelectronics.
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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.hull.ac.uk |