Projects per year
Abstract
III-nitride core-shell nanorods are promising for the development of high efficiency light emitting diodes and novel optical devices. We reveal the nanoscale optical and structural properties of core-shell InGaN nanorods formed by combined top-down etching and regrowth to achieve non-polar sidewalls with a low density of extended defects. While the luminescence is uniform along the non-polar {1–100} sidewalls, nano-cathodoluminescence shows a sharp reduction in the luminescent intensity at the intersection of the non-polar {1–100} facets. The reduction in the luminescent intensity is accompanied by a reduction in the emission energy localised at the apex of the corners. Correlative compositional analysis reveals an increasing indium content towards the corner except at the apex itself. We propose that the observed variations in the structure and chemistry are responsible for the changes in the optical properties at the corners of the nanorods. The insights revealed by nano-cathodoluminescence will aid in the future development of higher efficiency core-shell nanorods.
Original language | English |
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Article number | 172105 |
Number of pages | 5 |
Journal | Applied Physics Letters |
Volume | 110 |
DOIs | |
Publication status | Published - 28 Apr 2017 |
Keywords
- nanorods
- light emitting diodes
- nano-cathodoluminescence
- nitride semiconductors
- quantum confined Stark effect
- efficiency droop
Projects
- 1 Active
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Manufacturing of nano-engineered III-nitride semiconductors
EPSRC (Engineering and Physical Sciences Research Council)
1/05/15 → 30/09/21
Project: Research
Datasets
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Data for: "Structural impact on the nanoscale optical properties of InGaN core-shell nanorods"
Martin, R. (Creator) & Bryce, C. G. (Creator), 6 Jun 2017
DOI: 10.17863/CAM.9041
Dataset