| EPSRC Reference: |
GR/R02207/01 |
| Title: |
High Temperature Annealing of Gan and Algan Monitored By Raman Scattering |
| Principal Investigator: |
Kuball, Professor M |
| Other Investigators: |
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| Department: |
Physics |
| Organisation: |
University of Bristol |
| Scheme: |
Standard Research (Pre-FEC) |
| Starts: |
19 March 2001 |
Ends: |
18 March 2004 |
Value (£): |
164,686
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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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Summary on Grant Application Form |
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III-V nitrides have attracted great attention because of their wide spectrum of applications ranging from opto-electronic devices for the blue-ultraviolet spectral region to electronic devices. Based on our initial success of applying Raman scattering to study the thermal stability of GaN, we propose to extend these studies to investigate the high-temperature annealing of GaN and AlGaN as function of doping and aluminium composition in nitrogen and oxygen (favourable to improve properties of p-type material) ambient. High-temperature annealing is an important processing step for the III-V nitride device fabrication. Changes in the near-surface stochiometry that deteriorate electrical properties occur at a temperature, which is about 100(C lower than the temperature where visible surface degradation appears. The non-invasive monitoring of III-V nitride materials parameters (strain, doping, interfacial reactions, ...) during annealing using Raman scattering is therefore essential (results transferable to monitor growth and high-temperature passive devices). As crucial part of this proposal, we will employ both visible and ultraviolet micro-Raman scattering to probe III-V nitride material parameters averaged over the layer thickness and in a thin sample surface layer. Renishaw strongly supports this proposal by the large financial commitment of providing an UV-micro-Raman/PL-systems, Thomas-Swan, Nottingham-University, Bath-University, DERA-Malvern and CNRS-Valbonne by providing samples.
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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.bris.ac.uk |