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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

Doctor of Philosophy, University of Oxford

Physics, Master of Physics, 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 2019

Understanding the resolution limit of Displacement Talbot Lithography

Chausse, P., Le Boulbar, E., Lis, S. & Shields, P., 15 Jan 2019, (Accepted/In press) In : Optics Express.

Research output: Contribution to journalArticle

1 Citations

Deep UV Emission from Highly Ordered AlGaN/AlN Core–Shell Nanorods

Coulon, P-M., Kusch, G., Martin, R. W. & Shields, P. A., 6 Sep 2018, In : ACS Applied Materials and Interfaces.

Research output: Contribution to journalArticle

Open Access
File
Nanorods
Nanostructures
Light emitting diodes
Stark effect
Fabrication
1 Citations

Hybrid top-down/bottom-up fabrication of a highly uniform and organized faceted AlN nanorod scaffold

Coulon, P-M., Kusch, G., Fletcher, P., Chausse, P., Martin, R. W. & Shields, P. A., 5 Jul 2018, In : Materials. 11, 7, 1140.

Research output: Contribution to journalArticle

Open Access
Nanorods
Scaffolds
Fabrication
Dry etching
Wet etching
2 Citations

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
1 Citations

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

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

Dataset for Investigation of InGaN facet-dependent non-polar growth rates and composition for core-shell LEDs

Shields, P. (Creator), Girgel, I. (Creator), Le Boulbar, E. (Creator), Coulon, P. (Creator), Sahonta, S. (Creator), Allsopp, D. (Creator), Humphreys, C. (Creator), University of Bath, 27 Jan 2016

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

Thesis

Development of InGaN/GaN Core-Shell Light Emitters

Author: Girgel, I., 27 Jun 2017

Supervisor: Shields, P. (Supervisor)

Student thesis: Doctoral ThesisPhD

File

Photonic Crystals for the Control of Light Extraction from III-Nitride Light-Emitting Diodes

Author: Lewins, C., 1 Jun 2016

Supervisor: Allsopp, D. (Supervisor) & Shields, P. (Supervisor)

Student thesis: Doctoral ThesisPhD

File