Imperial College London

Professor David W. McComb

Faculty of EngineeringDepartment of Materials

Adjunct Professor
 
 
 
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Contact

 

+44 (0)20 7594 6750d.mccomb Website

 
 
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Location

 

Royal School of MinesSouth Kensington Campus

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Summary

 

Publications

Citation

BibTex format

@article{Deitz:2018:10.1017/S143192761800017X,
author = {Deitz, JI and Sarwar, ATMG and Carnevale, SD and Grassman, TJ and Myers, RC and McComb, DW},
doi = {10.1017/S143192761800017X},
journal = {Microsc Microanal},
pages = {93--98},
title = {Nano-Cathodoluminescence Measurement of Asymmetric Carrier Trapping and Radiative Recombination in GaN and InGaN Quantum Disks.},
url = {http://dx.doi.org/10.1017/S143192761800017X},
volume = {24},
year = {2018}
}

RIS format (EndNote, RefMan)

TY  - JOUR
AB - The ability to characterize recombination and carrier trapping processes in group-III nitride-based nanowires is vital to further improvements in their overall efficiencies. While advances in scanning transmission electron microscope (STEM)-based cathodoluminescence (CL) have offered some insight into nanowire behavior, inconsistencies in nanowire emission along with CL detector limitations have resulted in the incomplete understanding in nanowire emission processes. Here, two nanowire heterostructures were explored with STEM-CL: a polarization-graded AlGaN nanowire light-emitting diode (LED) with a GaN quantum disk and a polarization-graded AlGaN nanowire with three different InGaN quantum disks. Most nanowires explored in this study did not emit. For the wires that did emit in both structures, they exhibited asymmetrical emission consistent with the polarization-induced electric fields in the barrier regions of the nano-LEDs. In the AlGaN/InGaN sample, two of the quantum disks exhibited no emission potentially due to the three-dimensional landscape of the sample or due to limitations in the CL detection.
AU - Deitz,JI
AU - Sarwar,ATMG
AU - Carnevale,SD
AU - Grassman,TJ
AU - Myers,RC
AU - McComb,DW
DO - 10.1017/S143192761800017X
EP - 98
PY - 2018///
SP - 93
TI - Nano-Cathodoluminescence Measurement of Asymmetric Carrier Trapping and Radiative Recombination in GaN and InGaN Quantum Disks.
T2 - Microsc Microanal
UR - http://dx.doi.org/10.1017/S143192761800017X
UR - https://www.ncbi.nlm.nih.gov/pubmed/29699596
VL - 24
ER -