Projects per year
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).
Expertise related to UN Sustainable Development Goals
In 2015, UN member states agreed to 17 global Sustainable Development Goals (SDGs) to end poverty, protect the planet and ensure prosperity for all. This person’s work contributes towards the following SDG(s):
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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- 1 Similar Profiles
Collaborations and top research areas from the last five years
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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
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INREP - Towards Indium free TCOs
Allsopp, D. (PI), Morgan, B. (CoI), Shields, P. (CoI) & Walsh, A. (CoI)
1/02/15 → 31/01/18
Project: EU Commission
Research output
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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., 11 Feb 2025, In: Micromachines. 16, 2, 207.Research output: Contribution to journal › Article › peer-review
Open Access -
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 Access1 Citation (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 Access -
Negative Capacitance Analysis of Multi-Quantum-Well Light-Emitting Diodes
Yang, X., Feng, X., Meng, Y., He, L., Zhang, P., Zhang, D., Gao, S., Shields, P., Tian, H. & Liu, H., 21 Jan 2025, In: Electronics. 14, 3, 413.Research output: Contribution to journal › Article › peer-review
Open Access -
Ultrasharp periodic AlN nanotips formed via purely subtractive nanofabrication
Armstrong, R. F. & Shields, P., 1 Jun 2025, In: Microelectronic Engineering. 298, 112312.Research output: Contribution to journal › Article › peer-review
Open Access
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 "Displacement Talbot Lithography for nano-engineering of III-nitride materials"
Coulon, P.-M. (Creator) & Shields, P. (Project Leader), University of Bath, 18 Sept 2019
DOI: 10.15125/BATH-00696
Dataset
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Dataset for "Influence of MOVPE environment on the selective area thermal etching of GaN nanohole arrays"
Coulon, P.-M. (Creator) & Shields, P. (Project Leader), University of Bath, 16 Mar 2020
DOI: 10.15125/BATH-00726
Dataset