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20012022
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Research Output 2001 2019

2018

A luminescence study of Cu2ZnSnSe4/Mo/glass films and solar cells with near stoichiometric copper content

Yakushev, M. V., Sulimov, M. A., Márquez-Prieto, J., Forbes, I., Edwards, P. R., Zhivulko, V. D., Borodavchenko, O. M., Mudryi, A. V., Krustok, J. & Martin, R. W., 9 Nov 2018, (Accepted/In press) In : Journal of Physics D: Applied Physics. 10 p.

Research output: Contribution to journalArticle

Luminescence
Copper
Solar cells
solar cells
luminescence

Cathodoluminescence studies of chevron features in semi-polar (11-22) InGaN/GaN multiple quantum well structures

Brasser, C., Bruckbauer, J., Gong, Y. P., Jiu, L., Bai, J., Warzecha, M., Edwards, P. R., Wang, T. & Martin, R. W., 1 May 2018, In : Journal of Applied Physics. 123, 7 p., 174502

Research output: Contribution to journalArticle

Open Access
File
cathodoluminescence
quantum wells
nitrides
light emission
light emitting diodes
Spectrographs
Cathodoluminescence
cathodoluminescence
Luminescence
Cones
2 Citations

Eu-Mg defects and donor-acceptor pairs in GaN: photodissociation and the excitation transfer problem

Singh, A. K., O'Donnell, K. P., Edwards, P. R., Lorenz, K., Leach, J. H. & Boćkowski, M., 22 Jan 2018, In : Journal of Physics D: Applied Physics. 51, 6, 5 p., 065106

Research output: Contribution to journalArticle

Open Access
File
Photodissociation
photodissociation
Defects
defects
Photoluminescence
1 Citations

Extended X-ray absorption fine structure study of Er bonding in AlNO:Erx films with x <= 3.6%

Katsikini, M., Katchkanov, V., Boulet, P., Edwards, P. R., O'Donnell, K. P. & Brien, V., 28 Aug 2018, In : Journal of Applied Physics. 124, 8, 5 p., 085705

Research output: Contribution to journalArticle

Open Access
File
fine structure
x rays
sublattices
radio frequencies
magnetron sputtering
3 Citations

Generated carrier dynamics in V-pit enhanced InGaN/GaN light emitting diode

Ajia, I. A., Edwards, P. R., Pak, Y., Belekov, E., Roldan, M. A., Wei, N., Liu, Z., Martin, R. W. & Roqan, I. S., 21 Mar 2018, In : ACS Photonics. 5, 3, p. 820-826 7 p.

Research output: Contribution to journalArticle

Light emitting diodes
light emitting diodes
Light
Semiconductor quantum wells
Quantum efficiency

Hysteretic photochromic switching (HPS) in doubly doped GaN(Mg):Eu—a summary of recent results

Edwards, P. R., O'Donnell, K. P., Singh, A. K., Cameron, D., Lorenz, K., Yamaga, M., Leach, J. H., Kappers, M. J. & Boćkowski, M., 22 Sep 2018, In : Materials. 11, 10, 9 p., 1800

Research output: Contribution to journalArticle

Open Access
File
Europium
Rare earths
Light emitting diodes
Photoluminescence
Doping (additives)
1 Citations

Multi-wavelength emission from a single InGaN/GaN nanorod analyzed by cathodoluminescence hyperspectral imaging

Kusch, G., Conroy, M., Li, H., Edwards, P. R., Zhao, C., Ooi, B. S., Pugh, J., Cryan, M. J., Parbrook, P. J. & Martin, R. W., 29 Jan 2018, In : Scientific Reports. 8, 1, 8 p., 1742

Research output: Contribution to journalArticle

Open Access
File
cathodoluminescence
nanorods
luminescence
wavelengths
energy bands

Room temperature cathodoluminescence quenching of Er3+ in AlNOEr

Brien, V., Edwards, P. R., Boulet, P. & O'Donnell, K. P., 5 Sep 2018, In : Journal of Luminescence. 205, p. 97-101 5 p.

Research output: Contribution to journalArticle

Erbium
Cathodoluminescence
cathodoluminescence
Quenching
Phonons
Electron probe microanalysis
electron probes
microanalysis
Nitrides
nitrides
2017
4 Citations

Analysis of doping concentration and composition in wide bandgap AlGaN:Si by wavelength dispersive X-ray spectroscopy

Kusch, G., Mehnke, F., Enslin, J., Edwards, P. R., Wernicke, T., Kneissl, M. & Martin, R. W., 13 Feb 2017, In : Semiconductor Science and Technology. 32, 3, 7 p., 035020

Research output: Contribution to journalArticle

Open Access
File
Energy gap
Doping (additives)
Secondary ion mass spectrometry
Chemical analysis
wavelengths
4 Citations

Characteristics of GaN-based light emitting diodes with different thicknesses of buffer layer grown by HVPE and MOCVD

Tian, P., Edwards, P. R., Wallace, M. J., Martin, R. W., McKendry, J. J. D., Gu, E., Dawson, M. D., Qiu, Z-J., Jia, C., Chen, Z., Zhang, G., Zheng, L. & Liu, R., 23 Jan 2017, In : Journal of Physics D: Applied Physics. 50, 7, 12 p., 075101

Research output: Contribution to journalArticle

Open Access
File
Metallorganic chemical vapor deposition
Buffer layers
metalorganic chemical vapor deposition
Light emitting diodes
light emitting diodes
7 Citations

Charge carrier localised in zero-dimensional (CH3NH3)3Bi2I9 clusters

Ni, C., Hedley, G. J., Payne, J., Svrcek, V., McDonald, C., Jagadamma, L. K., Edwards, P., Martin, R., Mariotti, D., Maguire, P., Samuel, I. & Irvine, J., 1 Aug 2017, In : Nature Communications. 8, 7 p., 170

Research output: Contribution to journalArticle

Open Access
File
Charge carriers
charge carriers
Metals
excitons
methylidyne
4 Citations

Evolution of the m-plane quantum well morphology and composition within a GaN/InGaN core–shell structure

Coulon, P-M., Vajargah, S. H., Bao, A., Edwards, P. R., Le Boulbar, E. D., Girgel, I., Martin, R. W., Humphreys, C. J., Oliver, R. A., Allsopp, D. W. E. & Shields, P. A., 1 Feb 2017, In : Crystal Growth and Design. 17, 2, p. 474-482 9 p.

Research output: Contribution to journalArticle

Open Access
File
Shells (structures)
Semiconductor quantum wells
quantum wells
Chemical analysis
Indium
4 Citations

Hysteretic photochromic switching of Eu-Mg defects in GaN links the shallow transient and deep ground states of the Mg acceptor

Singh, A. K., O'Donnell, K. P., Edwards, P. R., Lorenz, K., Kappers, M. J. & Bokowski, M., 3 Feb 2017, In : Scientific Reports. 7, 6 p., 41982

Research output: Contribution to journalArticle

Open Access
File
ground state
defects
configurations
luminous intensity
time dependence
7 Citations

Influence of the copper content on the optical properties of CZTSe thin films

Yakushev, M. V., Sulimov, M. A., Márquez-Prieto, J., Forbes, I., Krustok, J., Edwards, P. R., Zhivulko, V. D., Borodavchenko, O. M., Mudryi, A. V. & Martin, R. W., 1 Aug 2017, In : Solar Energy Materials and Solar Cells. 168, p. 69-77 9 p.

Research output: Contribution to journalArticle

Open Access
File
Copper
Photoluminescence
Optical properties
Thin films
Solar cells
3 Citations

Luminescence of Eu3+ in GaN(Mg, Eu): transitions from the 5D1 level

Singh, A. K., O'Donnell, K. P., Edwards, P. R., Cameron, D., Lorenz, K., Kappers, M. J., Boćkowski, M., Yamaga, M. & Prakash, R., 14 Dec 2017, In : Applied Physics Letters. 111, 24, 4 p., 241105

Research output: Contribution to journalArticle

Open Access
File
luminescence
photoluminescence
temperature dependence
cooling
defects
2 Citations

Quantum well engineering in InGaN/GaN core-shell nanorod structures

Bryce, C. G., Le Boulbar, E. D., Coulon, P-M., Edwards, P. R., Gîrgel, I., Allsopp, D. W. E., Shields, P. A. & Martin, R. W., 27 Sep 2017, In : Journal of Physics D: Applied Physics. 50, 42, 6 p., 42LT01

Research output: Contribution to journalArticle

Open Access
File
Nanorods
Semiconductor quantum wells
nanorods
quantum wells
Growth temperature
2 Citations

Spatially-resolved optical and structural properties of semi-polar (11-22) AlxGa1-xN with x up to 0.56

Bruckbauer, J., Li, Z., Naresh-Kumar, G., Warzecha, M., Edwards, P. R., Jiu, L., Gong, Y., Bai, J., Wang, T., Trager-Cowan, C. & Martin, R. W., 7 Sep 2017, In : Scientific Reports. 7, 10 p., 10804

Research output: Contribution to journalArticle

Open Access
File
crystal defects
optical properties
wavelengths
pushing
cathodoluminescence
2016
3 Citations

Analysis of defect-related inhomogeneous electroluminescence in InGaN/GaN QW LEDs

Ren, C. X., Rouet-Leduc, B., Griffiths, J. T., Bohacek, E., Wallace, M. J., Edwards, P. R., Hopkins, M. A., Allsopp, D. W. E., Kappers, M. J., Martin, R. W. & Oliver, R. A., 30 Nov 2016, In : Superlattices and Microstructures. 99, p. 118-124 7 p.

Research output: Contribution to journalArticle

Open Access
File
Electroluminescence
electroluminescence
Light emitting diodes
light emitting diodes
Defects
3 Citations

Colour tuning in white hybrid inorganic/organic light-emitting diodes

Bruckbauer, J., Brasser, C., Findlay, N. J., Edwards, P. R., Wallis, D. J., Skabara, P. J. & Martin, R. W., 12 Oct 2016, In : Journal of Physics D: Applied Physics. 49, 40, 9 p., 405103

Research output: Contribution to journalArticle

Open Access
File
Organic light emitting diodes (OLED)
Light emitting diodes
light emitting diodes
Tuning
tuning

Correction: Site controlled red-yellow-green light emitting InGaN quantum discs on nano-tipped GaN rods

Conroy, M., Li, H., Kusch, G., Zhao, C., Ooi, B., Edwards, P. R., Martin, R. W., Holmes, J. D. & Parbrook, P. J., 21 Jul 2016, In : Nanoscale. 8, 27, p. 13521 1 p.

Research output: Contribution to journalArticle

Open Access
File
Methyl Green
12 Citations

Crystalfield symmetries of luminescent Eu3+ centers in GaN: the importance of the 5D0 to 7F1 transition

O'Donnell, K. P., Edwards, P. R., Yamaga, M., Lorenz, K., Kappers, M. J. & Boćkowski, M., 11 Jan 2016, In : Applied Physics Letters. 108, 2, 5 p., 022102

Research output: Contribution to journalArticle

Open Access
File
Defects
defects
symmetry
Optical devices
Optoelectronic devices
6 Citations
Open Access
File
Nitrides
nitrides
Imaging techniques
Thin films
Electrons
9 Citations

Impact of the selenisation temperature on the structural and optical properties of CZTSe absorbers

Márquez-Prieto, J., Yakushev, M. V., Forbes, I., Krustok, J., Edwards, P. R., Zhivulko, V. D., Borodavchenko, O. M., Mudryi, A. V., Dimitrievska, M., Izquierdo-Roca, V., Pearsall, N. & Martin, R. W., 31 Aug 2016, In : Solar Energy Materials and Solar Cells. 152, p. 42-50 9 p.

Research output: Contribution to journalArticle

Open Access
File
Structural properties
Optical properties
Solar cells
Photoluminescence
Temperature
7 Citations

Investigation of indium gallium nitride facet-dependent nonpolar growth rates and composition for core–shell light-emitting diodes

Gîrgel, I., Edwards, P. R., Le Boulbar, E., Coulon, P-M., Sahonta, S-L., Allsopp, D. W. E., Martin, R. W., Humphreys, C. J. & Shields, P. A., 7 Mar 2016, In : Journal of Nanophotonics. 10, 1, 11 p., 016010

Research output: Contribution to journalArticle

Open Access
File
Gallium nitride
Indium
gallium nitrides
Light emitting diodes
indium
5 Citations

Site controlled red-yellow-green light emitting InGaN quantum discs on nano-tipped GaN rods

Conroy, M., Li, H., Kusch, G., Zhao, C., Ooi, B., Edwards, P. R., Martin, R. W., Holmes, J. D. & Parbrook, P. J., 26 May 2016, In : Nanoscale. 8, 21, p. 11019-11026 8 p.

Research output: Contribution to journalArticle

Open Access
File
Methyl Green
Nanorods
Coalescence
Organic Chemicals
Strain relaxation
14 Citations

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

Le Boulbar, E. M. D., Edwards, P. R., Vajargah, S. H., Griffiths, I., Gîrgel, I., Coulon, P. . M., Cherns, D., Martin, R. W., Humphreys, C. J., Bowen, C. R., Allsopp, D. W. E. & Shields, P. A., 6 Apr 2016, In : Crystal Growth and Design. 16, 4, p. 1907–1916 10 p.

Research output: Contribution to journalArticle

Open Access
File
Nanorods
Semiconductor quantum wells
nanorods
light emission
quantum wells
2015
15 Citations

Digital direct electron imaging of energy-filtered electron backscatter diffraction patterns

Vespucci, S., Winkelmann, A., Naresh-Kumar, G., Mingard, K. P., Maneuski, D., Edwards, P. R., Day, A. P., O'Shea, V. & Trager-Cowan, C., 15 Nov 2015, In : Physical Review B (Condensed Matter). 92, 20, 9 p., 205301

Research output: Contribution to journalArticle

Open Access
File
Electron diffraction
Diffraction patterns
diffraction patterns
electron energy
Imaging techniques
5 Citations

Effect of the barrier growth mode on the luminescence and conductivity micron scale uniformity of InGaN light emitting diodes

Wallace, M. J., Edwards, P. R., Kappers, M. J., Hopkins, M. A., Oehler, F., Sivaraya, S., Oliver, R. A., Humphreys, C. J., Allsopp, D. W. E. & Martin, R. W., 2015, In : Journal of Applied Physics. 117, 11, 6 p., 115705

Research output: Contribution to journalArticle

Open Access
File
light emitting diodes
luminescence
conductivity
cathodoluminescence
electrical properties
1 Citations

Investigation of facet-dependent InGaN growth for core-shell LEDs

Gîrgel, I., Edwards, P. R., Le Boulbar, E., Allsopp, D. W. E., Martin, R. W. & Shields, P. A., 13 Mar 2015, In : Proceedings of SPIE. 9363, 8 p., 93631V

Research output: Contribution to journalArticle

Open Access
File
InGaN
Facet
Nanowires
Light emitting diodes
flat surfaces
9 Citations

Photoluminescence studies of a perceived white light emission from a monolithic InGaN/GaN quantum well structure

Ben Sedrine, N., Esteves, T. C., Rodrigues, J., Rino, L., Correia, M. R., Sequeira, M. C., Neves, A. J., Alves, E., Boćkowski, M., Edwards, P. R., O'Donnell, K. P., Lorenz, K. & Monteiro, T., 2015, In : Scientific Reports. 5, 7 p., 13739

Research output: Contribution to journalArticle

Open Access
File
light emission
quantum wells
photoluminescence
annealing
color
3 Citations

Quantitative chemical mapping of InGaN quantum wells from calibrated high-angle annular dark field micrographs

Carvalho, D., Morales, F. M., Ben, T., García, R., Redondo-Cubero, A., Alves, E., Lorenz, K., Edwards, P. R., O'Donnell, K. P. & Wetzel, C., Aug 2015, In : Microscopy and Microanalysis. 21, 4, p. 994-1005 12 p.

Research output: Contribution to journalArticle

Open Access
File
Semiconductor quantum wells
quantum wells
Transmission electron microscopy
transmission electron microscopy
Scanning electron microscopy
7 Citations

Radiative recombination in Cu2ZnSnSe4 thin films with Cu deficiency and Zn excess

Yakushev, M. V., Márquez-Prieto, J., Forbes, I., Edwards, P. R., Zhivulko, V. D., Mudryi, A. V., Krustok, J. & Martin, R. W., 2 Nov 2015, In : Journal of Physics D: Applied Physics. 48, 47, 7 p., 475109

Research output: Contribution to journalArticle

Open Access
File
radiative recombination
Glass
Thin films
glass
thin films
6 Citations

Spatial clustering of defect luminescence centers in Si-doped low resistivity Al0.82Ga0.18N

Kusch, G., Nouf-Allehiani, M., Mehnke, F., Kuhn, C., Edwards, P. R., Wernicke, T., Knauer, A., Kueller, V., Naresh-Kumar, G., Weyers, M., Kneissl, M., Trager-Cowan, C. & Martin, R. W., 17 Aug 2015, In : Applied Physics Letters. 107, 7, 4 p., 072103

Research output: Contribution to journalArticle

Open Access
File
luminescence
electrical resistivity
defects
cathodoluminescence
screw dislocations
2014
11 Citations

Bias dependence and correlation of the cathodoluminescence and electron beam induced current from an InGaN/GaN light emitting diode

Wallace, M. J., Edwards, P. R., Kappers, M. J., Hopkins, M. A., Oehler, F., Sivaraya, S., Allsopp, D. W. E., Oliver, R. A., Humphreys, C. J. & Martin, R. W., 2014, In : Journal of Applied Physics. 116, 3, 6 p., 033105

Research output: Contribution to journalArticle

Open Access
File
cathodoluminescence
light emitting diodes
electron beams
electroluminescence
low conductivity

Cathodoluminescence hyperspectral imaging in geoscience

Edwards, P. R. & Lee, M. R., 2014, Cathodoluminescence and its Application to Geoscience. Coulson, I. M. (ed.). Québec, p. 29-45 17 p. (Short Course Series; vol. 45)

Research output: Chapter in Book/Report/Conference proceedingChapter (peer-reviewed)

Open Access
File
cathodoluminescence
electron
photons
electron irradiation
stimulated emission

Cathodoluminescence hyperspectral imaging of nitride core-shell structures

Edwards, P. R., Le Boulbar, E. D., Shields, P. A., Allsopp, D. W. E. & Martin, R. W., 2014, p. 679-680 2 p.

Research output: Contribution to conferenceAbstract

Open Access
File
cathodoluminescence
nanorods
nitrides
metalorganic chemical vapor deposition
flat surfaces
6 Citations

Cathodoluminescence hyperspectral imaging of trench-like defects in InGaN/GaN quantum well structures

Bruckbauer, J., Edwards, P. R., Sahonta, S-L., Massabuau, F. C-P., Kappers, M. J., Humphreys, C. J., Oliver, R. A. & Martin, R. W., 11 Mar 2014, In : Journal of Physics D: Applied Physics. 47, 13, p. 135107 6 p.

Research output: Contribution to journalArticle

Open Access
File
Cathodoluminescence
cathodoluminescence
Semiconductor quantum wells
quantum wells
Defects
11 Citations

Coincident electron channeling and cathodoluminescence studies of threading dislocations in GaN

Naresh-Kumar, G., Bruckbauer, J., Edwards, P. R., Kraeusel, S., Hourahine, B., Martin, R. W., Kappers, M. J., Moram, M. A., Lovelock, S., Oliver, R. A., Humphreys, C. J. & Trager-Cowan, C., Feb 2014, In : Microscopy and Microanalysis. 20, 1, p. 55-60 6 p.

Research output: Contribution to journalArticle

Open Access
File
Cathodoluminescence
cathodoluminescence
Dislocations (crystals)
Electrons
Imaging techniques

Electron channeling contrast imaging of defects in III-nitride semiconductors

Trager-Cowan, C. , Naresh-Kumar, G. , Allehiani, N. , Kraeusel, S. , Hourahine, B. , Vespucci, S. , Thomson, D. , Bruckbauer, J. , Kusch, G. , Edwards, P. R. , Martin, R. W. , Mauder, C. , Day, A. P. , Winkelmann, A. , Vilalta-Clemente, A. , Wilkinson, A. J. , Parbrook, P. J. , Kappers, M. J. , Moram, M. A. , Oliver, R. A. & 6 others Humphreys, C. J., Shields, P., Le Boulbar, E. D., Maneuski, D., O'Shea, V. & Mingard, K. P., Aug 2014, In : Microscopy and Microanalysis. 20, S3, p. 1024-1025 2 p.

Research output: Contribution to journalConference Contribution

Open Access
File
15 Citations

Electronic and structural characterisation of Cu3BiS3 thin films for the absorber layer of sustainable photovoltaics

Yakushev, M. V., Maiello, P., Raadik, T., Shaw, M. J., Edwards, P. R., Krustok, J., Mudryi, A. V., Forbes, I. & Martin, R. W., 2014, In : Thin Solid Films. 562, p. 195-199 6 p.

Research output: Contribution to journalArticle

Open Access
File
absorbers
Energy gap
Thin films
thin films
electronics
13 Citations

Europium-doped GaN(Mg): beyond the limits of the light-emitting diode

O'Donnell, K. P., Edwards, P. R., Kappers, M. J., Lorenz, K., Alves, E. J. & Boćkowski, M. X., Apr 2014, In : Physica Status Solidi C. 11, 3-4, p. 662–665 4 p.

Research output: Contribution to journalArticle

europium
light emitting diodes
magneto-optics
exploitation
ions
7 Citations

Excitonic localization in AlN-rich AlxGa1-xN/AlyGa1-yN multi-quantum-well grain boundaries

Ajia, I. A., Edwards, P. R., Liu, Z., Yan, J. C., Martin, R. W. & Roqan, I. S., Sep 2014, In : Applied Physics Letters. 105, 12, 5 p., 122111

Research output: Contribution to journalArticle

Open Access
File
grain boundaries
quantum wells
cathodoluminescence
metalorganic chemical vapor deposition
tendencies
11 Citations

Influence of stress on optical transitions in GaN nanorods containing a single InGaN/GaN quantum disk

Zhuang, Y. D., Bruckbauer, J., Shields, P. A., Edwards, P. R., Martin, R. W. & Allsopp, D. W. E., 3 Nov 2014, In : Journal of Applied Physics. 116, 17, 7 p., 174305

Research output: Contribution to journalArticle

Open Access
File
optical transition
nanorods
cathodoluminescence
Stark effect
incidence
7 Citations

Influence of substrate miscut angle on surface morphology and luminescence properties of AlGaN

Kusch, G., Li, H., Edwards, P. R., Bruckbauer, J., Sadler, T. C., Parbrook, P. J. & Martin, R. W., 3 Mar 2014, In : Applied Physics Letters. 104, 9, 4 p., 092114

Research output: Contribution to journalArticle

Open Access
File
luminescence
cathodoluminescence
inhomogeneity
cracks
electron microscopes
2 Citations

Investigation of the structural, optical and electrical properties of Cu3BiS3 semiconducting thin films

Yakushev, M. V., Maiello, P., Raadik, T., Shaw, M. J., Edwards, P. R., Krustok, J., Mudryi, A. V., Forbes, I. & Martin, R. W., 2014, In : Energy Procedia. 60, p. 166-172 7 p.

Research output: Contribution to journalArticle

Open Access
File
Semiconducting films
Structural properties
Electric properties
Optical properties
Thin films
6 Citations

Sequential multiple-step europium ion implantation and annealing of GaN

Miranda, S. M. C., Edwards, P. R., O'Donnell, K. P., Boćkowski, M., Alves, E., Roqan, I. S., Vantomme, A. & Lorenz, K., 1 Feb 2014, In : Physica Status Solidi C. 11, 2, p. 253-257 5 p.

Research output: Contribution to journalConference Contribution

europium
ion implantation
annealing
vapor phase epitaxy
hydrides
13 Citations

Strong photonic crystal behavior in regular arrays of core-shell and quantum disc InGaN/GaN nanorod light-emitting diodes

Lewins, C. J., Le Boulbar, E. D., Lis, S. M., Edwards, P. R., Martin, R. W., Shields, P. A. & Allsopp, D. W. E., 2014, In : Journal of Applied Physics. 116, 4, 7 p., 044305

Research output: Contribution to journalArticle

Open Access
File
nanorods
light emitting diodes
photonics
crystals
slabs