| EPSRC Reference: |
GR/L07598/01 |
| Title: |
LATTICE MATCHING OF SUBSTRATES FOR GROWTH OF GALLIUM NITRIDE |
| Principal Investigator: |
Macdonald, Professor JE |
| Other Investigators: |
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| Project Partners: |
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| Department: |
School of Physics and Astronomy |
| Organisation: |
Cardiff University |
| Scheme: |
Standard Research (Pre-FEC) |
| Starts: |
01 October 1996 |
Ends: |
30 September 1999 |
Value (£): |
87,712
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| EPSRC Research Topic Classifications: |
| Materials Synthesis & Growth |
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Summary on Grant Application Form |
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GaN and related materials are poised to have a major impact in the fields of optoelectronic devices operating across the whole visible spectrum and electronic devices operating in hostile and high temperature environments. The critical hindrance to their widespread application is the complete absence of a lattice-matched substrate material. We propose a timely series of exploratory, potentially high-payoff, low cost investigations of the early stages of growth based on a novel idea aimed at solving the lattice-matching problem. The idea, for which we have filed a patent, makes use of high quality cubic substrates, InSb (001) and CdTe (001), whose lattice constants are almost exactly a factor of sqrt 2 larger than that of the cubic phase of GaN. Thus effective lattice matching will be possible provided the nitride epilayer can be induced to grow in a 45-rotated orientation with respect to the substrate. The primary aim of the project is to achieve this objective. The less speculative secondary aim is to understand and control the nucleation and strain relaxation processes in two other promising substrates, SiC and LiGaO2, the first being poorly lattice-matched whereas the latter represents a class of orthorhombic and tetragonal substrates well lattice-matched along one axis only.
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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.cf.ac.uk |