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

Manufacturing of Nano-Engineered III-N Semiconductors

Shields, P., Allsopp, D. & Wang, W.

1/05/1528/02/21

Project: Research council

manufacturing
nitrides
wafers
gallium nitrides
light emitting diodes
lithography
manufacturing
nitrides
industries
wafers

INREP

Allsopp, D. & Shields, P.

1/02/1531/01/18

Project: EU Commission

Oxides
Indium
Touch screens
Solar cells
Electrodes

Nanoscale Sensors for Healthcare and the Environment (NANOSENSE)

Shields, P. & Allsopp, D.

13/10/1413/04/15

Project: Research-related fundingInternally Funded Research

High Intensity Light Emitting Diodes (LEDs) for Advanced Projection Systems

Allsopp, D. & Shields, P.

2/12/1330/11/15

Project: Central government, health and local authorities

Research Output 1999 2018

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. 1 May 2018 In : Physica Status Solidi (B). 255, 5, 9 p., 1700445

Research output: Contribution to journalArticle

Nanorods
nanorods
Light emitting diodes
light emitting diodes
Fabrication

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
Nanorods
Magnesium
nanorods
Light emitting diodes
magnesium
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
Dislocations (crystals)
Fabrication
fabrication
Masks
Gallium nitride
Open Access
File
Metamaterials
Lithography
lithography
Fabrication
Alternatives
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)
Semiconductor quantum wells
quantum wells
Chemical analysis
Indium

Datasets

Dataset for 'Design and fabrication of enhanced lateral growth for dislocation reduction and strain management in GaN using nanodashes'

Shields, P. (Creator), Le Boulbar, E. (Creator), Priesol, J. (Creator), Šatka, A. (Creator), Allehiani, N. (Creator), Naresh-Kumar, G. (Creator), Fox, S. (Creator), Trager-Cowan, C. (Creator), University of Bath, Mar 2017

Dataset

Fabrication of high-aspect ratio GaN nanostructures for advanced photonic devices

Le Boulbar, E. (Creator), Lewins, C. (Creator), Allsopp, D. (Creator), Bowen, C. (Creator), Shields, P. (Creator), University of Bath, Apr 2016

Dataset

Dataset for Structural and optical emission uniformity of m-plane InGaN single quantum wells in core-shell nanorods

Le Boulbar, E. (Creator), Hosseini-Vajargah, S. (Creator), Edwards, P. R. (Creator), Girgel, I. (Creator), Coulon, P. (Creator), Cherns, D. (Creator), Martin, R. W. (Creator), Humphreys, C. (Creator), Bowen, C. (Creator), Allsopp, D. (Creator), Shields, P. (Creator), University of Bath, 2015

Dataset