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, The magneto-optical properties of semiconductors and the band structure of gallium nitride, University of Oxford
Award Date: 1 Jun 2001
Physics, Master of Physics, University of Oxford
Award Date: 1 Jun 1997
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Collaborations and top research areas from the last five years
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MIST: Monolithic Integration of Semiconductor Technologies for Fabless MEMS-Photonics Sensors
Mohammadi, A. (PI), Shields, P. (CoI) & Van Vlymen, M. (Researcher)
Innovate UK, Innovate UK Business Connect
1/10/25 → 31/05/26
Project: Central government, health and local authorities
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Displacement Talbot Lithography: accelerating a versatile and low-cost patterning technique for precision manufacturing
Shields, P. (PI)
Engineering and Physical Sciences Research Council
1/10/21 → 31/08/25
Project: Research council
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Manufacturing of Large-Area InP on nano-V-grooved CMOS compatible Si
Shields, P. (PI) & Chausse, P. (Researcher)
Engineering and Physical Sciences Research Council
24/04/20 → 30/04/21
Project: Research council
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Manufacturing of Nano-Engineered III-N Semiconductors
Shields, P. (PI), Allsopp, D. (CoI) & Wang, W. (CoI)
Engineering and Physical Sciences Research Council
1/05/15 → 30/09/21
Project: Research council
Research output
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Nature of the SiGaN antisurfactant layer enabling MOVPE growth of GaN nanowires
Bosch, J., Lymperakis, L., Vennéguès, P., Coulon, P. M., Shields, P. A., Zúñiga Pérez, J., Tchernycheva, M., Durand, C. & Alloing, B., 28 Mar 2026, In: Journal of Applied Physics. 139, 12, 125303.Research output: Contribution to journal › Article › peer-review
Open Access -
Rapid Nanocellulose Wet Nanoimprint Lithography for Tunable Structural Color
Mao, H., Ahmad, Z., Xin, L., Lama, H., Fan, P., Shields, P., Eyley, S., Thielemans, W. & Cabral, J. T., 13 Jan 2026, In: ACS Nano. 20, 1, p. 823-834 12 p.Research output: Contribution to journal › Article › peer-review
Open Access2 Link opens in a new tab Citations (SciVal) -
A 64×64 GaN Micro LED monolithic display array fabrication and light cross talk analysis
Yang, X., Meng, Y., Feng, X., He, L., Shields, P., Lee, S., Wang, Y., Wang, Z., Ning, P. & Liu, H., 28 Feb 2025, In: Micromachines. 16, 2, 207.Research output: Contribution to journal › Article › peer-review
Open Access4 Link opens in a new tab Citations (SciVal) -
Fabrication of uniform, periodic arrays of exotic AlN nanoholes by combining dry etching and hot selective wet etching, accessing geometries unrealisable from wet etching of planar AlN
Armstrong, R. F. & Shields, P., 2 Jan 2025, In: Microelectronic Engineering. 295, 112263.Research output: Contribution to journal › Article › peer-review
Open Access6 Link opens in a new tab Citations (SciVal) -
Investigating the exciton dynamics in InGaN/GaN core-shell nanorods using time-resolved cathodoluminescence
Loeto, K., Kusch, G., Brandt, O., Coulon, P. M., Hammersley, S., Lähnemann, J., Girgel, I., Fairclough, S. M., Sarkar, M., Shields, P. A. & Oliver, R. A., 13 Jan 2025, In: Nanotechnology. 36, 2, 025703.Research output: Contribution to journal › Article › peer-review
Open Access2 Link opens in a new tab Citations (SciVal)
Datasets
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Dataset for "Understanding the resolution limit of Displacement Talbot Lithography"
Chausse, P. (Creator), Le Boulbar, E. (Creator), Lis, S. (Creator) & Shields, P. (Creator), University of Bath, 20 Feb 2019
DOI: 10.15125/BATH-00570
Dataset
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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), Nouf-Allehiani, M. (Creator), Naresh-Kumar, G. (Creator), Fox, S. (Creator), Trager-Cowan, C. (Creator) & Allsopp, D. (Supervisor), University of Bath, Mar 2017
DOI: 10.15125/BATH-00257
Dataset
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Dataset for "Displacement Talbot Lithography: an alternative technique to fabricate nanostructured metamaterials"
Le Boulbar, E. (Creator) & Shields, P. (Project Leader), University of Bath, 15 May 2017
DOI: 10.15125/BATH-00363
Dataset
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Dataset for Optical characterization of magnesium incorporation in p-GaN layers for core–shell nanorod light-emitting diodes
Girgel, I. (Creator), Šatka, A. (Creator), Priesol, J. (Creator), Coulon, P.-M. (Creator), Le Boulbar, E. (Creator), Batten, T. (Creator), Allsopp, D. (Creator) & Shields, P. (Creator), University of Bath, 27 Mar 2018
DOI: 10.15125/BATH-00207
Dataset
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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. (Creator), Griffiths, I. (Creator), Girgel, I. (Creator), Coulon, P.-M. (Creator), Cherns, D. (Creator), Martin, R. W. (Creator), Humphreys, C. J. (Creator), Bowen, C. (Creator), Allsopp, D. (Creator) & Shields, P. (Creator), University of Bath, 3 Mar 2016
DOI: 10.15125/BATH-00150
Dataset
Activities
- 1 Conference presentation / attendance
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Advanced HE Teaching and Learning Conference, 2-4 July 2024, Nottingham
Mtar, M. (Speaker), Mammadova, B. (Speaker), Forey, G. (Speaker), Minelli, E. (Speaker), Shermer, G. (Speaker) & Shields, P. (Speaker)
2 Jul 2024 → 4 Jul 2024Activity: Academic conferences and events (excluding conference publications) › Conference presentation / attendance