Projects per year
Abstract
The scanning electron microscopy techniques of electron backscatter diffraction (EBSD), electron channelling contrast imaging (ECCI) and cathodoluminescence (CL) hyperspectral imaging provide complementary information on the structural and luminescence properties of materials rapidly and non-destructively, with a spatial resolution of tens of nanometres. EBSD provides crystal orientation, crystal phase and strain analysis, whilst ECCI is used to determine the planar distribution of extended defects over a large area of a given sample. CL reveals the influence of crystal structure, composition and strain on intrinsic luminescence and/or reveals defect-related luminescence. Dark features are also observed in CL images where carrier recombination at defects is non-radiative. The combination of these techniques is a powerful approach to clarifying the role of crystallography and extended defects on a material's light emission properties. Here we describe the EBSD, ECCI and CL techniques and illustrate their use for investigating the structural and light emitting properties of UV-emitting nitride semiconductor structures. We discuss our investigations of the type, density and distribution of defects in GaN, AlN and AlGaN thin films and also discuss the determination of the polarity of GaN nanowires.
Original language | English |
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Article number | 054001 |
Number of pages | 15 |
Journal | Semiconductor Science and Technology |
Volume | 35 |
Issue number | 5 |
Early online date | 12 Feb 2020 |
DOIs | |
Publication status | Published - 25 Mar 2020 |
Keywords
- EBSD
- nitride
- scanning electron microscopy
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Dive into the research topics of 'Structural and luminescence imaging and characterisation of semiconductors in the scanning electron microscope'. Together they form a unique fingerprint.Profiles
Projects
- 6 Finished
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Doctoral Training Partnership (DTP 2016-2017 University of Strathclyde) | McDermott, Ryan
Trager-Cowan, C., Martin, R. & McDermott, R.
EPSRC (Engineering and Physical Sciences Research Council)
1/10/17 → 1/10/21
Project: Research Studentship - Internally Allocated
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Quantitative non-destructive nanoscale characterisation of advanced materials
Hourahine, B., Edwards, P., Roper, M., Trager-Cowan, C. & Gunasekar, N.
EPSRC (Engineering and Physical Sciences Research Council)
1/06/17 → 30/11/21
Project: Research
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Nanoanalysis for Advanced Materials and Healthcare - EPSRC strategic equipment
Martin, R., Edwards, P., Faulds, K., Florence, A., Graham, D., Sefcik, J., Ter Horst, J., Trager-Cowan, C., Uttamchandani, D. & Wark, A.
EPSRC (Engineering and Physical Sciences Research Council)
8/11/15 → 7/11/19
Project: Research
Datasets
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Data for: “Scanning electron microscopy as a flexible technique for investigating the properties of UV-emitting nitride semiconductor thin films”
Trager-Cowan, C. (Creator), Alasmari, A. M. A. (Creator), Avis, W. (Contributor), Bruckbauer, J. (Creator), Edwards, P. (Contributor), Hourahine, B. (Contributor), Kraeusel, S. (Contributor), Kusch, G. (Creator), Johnston, R. (Contributor), Gunasekar, N. (Creator), Martin, R. (Contributor), Mohammad S, A. (Creator), Pascal, E. (Contributor), Spasevski, L. (Creator), Thomson, D. (Contributor), Vespucci, S. (Contributor), Parbrook, P. (Contributor), Smith, M. (Contributor), Enslin, J. (Contributor), Mehnke, F. (Contributor), Kneissl, M. (Contributor), Kuhn, C. (Contributor), Wernicke, T. (Contributor), Hagedorn, S. (Contributor), Knauer, A. (Contributor), Kueller, V. (Contributor), Walde, S. (Contributor), Weyers, M. (Contributor), Coulon, P. (Creator), Shields, P. (Contributor), Zhang, Y. (Contributor), Jiu, L. (Contributor), Gong, Y. (Contributor), Smith, R. M. (Contributor), Wang, T. (Contributor) & Winkelmann, A. (Creator), University of Strathclyde, 28 Oct 2019
DOI: 10.15129/b5238863-a088-4f30-8b13-2625260eb73a
Dataset
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Data for: "Determining GaN nanowire polarity and its influence on light emission in the scanning electron microscope"
Gunasekar, N. (Creator), Bruckbauer, J. (Creator), Winkelmann, A. (Contributor), Edwards, P. (Contributor), Hourahine, B. (Contributor), Trager-Cowan, C. (Contributor), Martin, R. (Supervisor) & Wang, T. (Creator), University of Strathclyde, 29 Apr 2019
DOI: 10.15129/b152a121-3495-4235-b9cd-985bf1355cd8
Dataset