Personal profile

Research interests

I currently work in the area of semiconductor technology, predominantly in the area of group III-V optoelectronics. A major focus of my work has been the creation of optoelectronic devices based on the group III-nitride wide bandgap semiconductor materials.

I have experience in MOVPE semiconductor growth, alongside micro and nanofabrication for the creation of light-emitting and laser diodes. Recently, I have been exploring semiconductor crystal growth on three-dimensional, patterned substrates; understanding how the substrate affects the growth process. This has led to an extensive study of core-shell light-emitting diodes; primarily emitting in the visible regime, but also more recently in the ultraviolet.

As a result of needing large area nanopatterning for creating growth templates, I also have expertise in nanoimprint lithography (NIL), electron beam lithography (EBL) and displacement Talbot lithography (DTL).

Education / Academic qualification

Physics, Master of Physics, University of Oxford

Doctor of Philosophy, University of Oxford

Fingerprint Fingerprint is based on mining the text of the person's scientific documents to create an index of weighted terms, which defines the key subjects of each individual researcher.

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Projects 2010 2021

Research Output 1999 2018

Optical characterization of magnesium incorporation in p-GaN layers for core-shell nanorod light-emitting diodes

Gîrgel, I., Šatka, A., Priesol, J., Coulon, P. M., Le Boulbar, E. D., Batten, T., Allsopp, D. W. E. & Shields, P. A. 20 Mar 2018 In : Journal of Physics D: Applied Physics. 51, 15, 155103

Research output: Contribution to journalArticle

Open Access
Cysteamine
Nicotinic Acids
Light emitting diodes
Nanostructures
Carbamoyl-Phosphate Synthase (Glutamine-Hydrolyzing)
1 Citations

Design and fabrication of enhanced lateral growth for dislocation reduction in GaN using nanodashes

Shields, P., Le Boulbar, E., Priesol, J., Nouf-Allehiani, M., Naresh-Kumar, G., Fox, S., Trager-Cowan, C., Šatka, A. & Allsopp, D. 15 May 2017 In : Journal of Crystal Growth. 466, p. 30-38

Research output: Contribution to journalArticle

Open Access
File
Masks
Gallium nitride
Epilayers
Cathodoluminescence
High electron mobility transistors
Open Access
File
Lithography
Metamaterials
Fabrication
Throughput
Nanostructures
3 Citations

Evolution of the m-plane Quantum Well Morphology and Composition within a GaN/InGaN Core-Shell Structure

Coulon, P-M., Hosseini-Vajargah, S., Bao, A., Edwards, P. R., Le Boulbar, E., Girgel, I., Martin, R. W., Humphreys, C., Oliver, R., Allsopp, D. & Shields, P. A. 1 Feb 2017 In : Crystal Growth and Design. 17, 2, p. 474-482

Research output: Contribution to journalArticle

Open Access
File
Shells (structures)
Indium
Nanorods
Light emitting diodes
Strain relaxation

Hybrid top-down/bottom-up fabrication of regular arrays of AlN nanorods for deep-UV core-shell LEDs

Coulon, P-M., Kusch, G., Le Boulbar, E., Chausse, P., Bryce, C. G., Martin, R. W. & Shields, P. 30 Nov 2017 In : Physica Status Solidi (B). 9 p., 1700445

Research output: Contribution to journalArticle

Nanorods
Ultraviolet radiation
Light emitting diodes
Masks
Diodes