Structural and optical emission uniformity of m-plane InGaN single quantum wells in core-shell nanorods
Le Boulbar, E mmanuel D. and Edwards, Paul R. and Vajargah, Shahrzad Hosseini and Griffiths, Ian and Gîrgel, Ionut and Coulon, Pierre - Marie and Cherns, David and Martin, Robert W. and Humphreys, C. J. and Bowen, Chris R. and Allsopp, D. W. E. and Shields, P. A. (2016) Structural and optical emission uniformity of m-plane InGaN single quantum wells in core-shell nanorods. Crystal Growth and Design, 16 (4). 1907–1916. ISSN 1528-7483 (https://doi.org/10.1021/acs.cgd.5b01438)
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Abstract
Controlling the long-range homogeneity of core-shell InGaN/GaN layers is essential for their use in light-emitting devices. This paper demonstrates variations in optical emission energy as low as ~7 meV.µm-1 along the m-plane facets from core-shell InGaN/GaN single quantum wells as measured through high-resolution cathodoluminescence hyperspectral imaging. The layers were grown by metal organic vapor phase epitaxy on etched GaN nanorod arrays with a pitch of 2 µm. High-resolution transmission electron microscopy and spatially-resolved energy-dispersive X-ray spectroscopy measurements demonstrate a long-range InN-content and thickness homogeneity along the entire 1.2 μm length of the m-plane. Such homogeneous emission was found on the m-plane despite the observation of short range compositional fluctuations in the InGaN single quantum well. The ability to achieve this uniform optical emission from InGaN/GaN core-shell layers is critical to enable them to compete with and replace conventional planar light-emitting devices.
ORCID iDs
Le Boulbar, E mmanuel D., Edwards, Paul R. ORCID: https://orcid.org/0000-0001-7671-7698, Vajargah, Shahrzad Hosseini, Griffiths, Ian, Gîrgel, Ionut, Coulon, Pierre - Marie, Cherns, David, Martin, Robert W. ORCID: https://orcid.org/0000-0002-6119-764X, Humphreys, C. J., Bowen, Chris R., Allsopp, D. W. E. and Shields, P. A.;-
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Item type: Article ID code: 56115 Dates: DateEvent6 April 2016Published7 March 2016Published Online7 March 2016Accepted6 October 2015SubmittedSubjects: Science > Physics Department: Faculty of Science > Physics
Technology and Innovation Centre > Bionanotechnology
Technology and Innovation Centre > PhotonicsDepositing user: Pure Administrator Date deposited: 07 Apr 2016 13:59 Last modified: 03 Sep 2024 00:52 Related URLs: URI: https://strathprints.strath.ac.uk/id/eprint/56115