STEM-CL investigations on the influence of stacking faults on the optical emission of cubic GaN epilayers and cubic GaN/AlN multi-quantum wells

R.M. Kemper, P. Veit, C. Mietze, A. Dempewolf, T. Wecker, F. Bertram, J. Christen, J. Lindner, D.J. As, Physica Status Solidi (C) 12 (2015) 469–472.

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Abstract
We report the influence of {111} stacking faults on the cathodoluminescence (CL) emission characteristics of cubic GaN (c-GaN) films and cubic GaN/AlN multiquantum wells. Transmission electron microscopy (TEM) measurements indicate that stacking faults (SFs) on the {111} planes are the predominant crystallographic defects in epitaxial films, which were grown on 3CSiC/ Si (001) substrates by plasma-assisted molecular beam epitaxy. The correlation of the SFs and the luminescence output is evidenced with a CL setup integrated in a scanning TEM (STEM). By comparing the STEM images and the simultaneously measured CL signals it is demonstrated that SFs in these films lead to a reduced CL emission intensity. Furthermore, the CL emission intensity is shown to increase with increasing film thickness and decreasing SF density. This correlation can be connected to the reduction of the full width at half maximum of X-ray diffraction rocking curves with increasing film thickness of c-GaN films.
Publishing Year
Journal Title
physica status solidi (c)
Volume
12
Issue
4-5
Page
469-472
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Kemper RM, Veit P, Mietze C, et al. STEM-CL investigations on the influence of stacking faults on the optical emission of cubic GaN epilayers and cubic GaN/AlN multi-quantum wells. physica status solidi (c). 2015;12(4-5):469-472. doi:10.1002/pssc.201400154
Kemper, R. M., Veit, P., Mietze, C., Dempewolf, A., Wecker, T., Bertram, F., … As, D. J. (2015). STEM-CL investigations on the influence of stacking faults on the optical emission of cubic GaN epilayers and cubic GaN/AlN multi-quantum wells. Physica Status Solidi (C), 12(4–5), 469–472. https://doi.org/10.1002/pssc.201400154
@article{Kemper_Veit_Mietze_Dempewolf_Wecker_Bertram_Christen_Lindner_As_2015, title={STEM-CL investigations on the influence of stacking faults on the optical emission of cubic GaN epilayers and cubic GaN/AlN multi-quantum wells}, volume={12}, DOI={10.1002/pssc.201400154}, number={4–5}, journal={physica status solidi (c)}, publisher={Wiley}, author={Kemper, R. M. and Veit, P. and Mietze, C. and Dempewolf, A. and Wecker, T. and Bertram, F. and Christen, J. and Lindner, Jörg and As, D. J.}, year={2015}, pages={469–472} }
Kemper, R. M., P. Veit, C. Mietze, A. Dempewolf, T. Wecker, F. Bertram, J. Christen, Jörg Lindner, and D. J. As. “STEM-CL Investigations on the Influence of Stacking Faults on the Optical Emission of Cubic GaN Epilayers and Cubic GaN/AlN Multi-Quantum Wells.” Physica Status Solidi (C) 12, no. 4–5 (2015): 469–72. https://doi.org/10.1002/pssc.201400154.
R. M. Kemper et al., “STEM-CL investigations on the influence of stacking faults on the optical emission of cubic GaN epilayers and cubic GaN/AlN multi-quantum wells,” physica status solidi (c), vol. 12, no. 4–5, pp. 469–472, 2015.
Kemper, R. M., et al. “STEM-CL Investigations on the Influence of Stacking Faults on the Optical Emission of Cubic GaN Epilayers and Cubic GaN/AlN Multi-Quantum Wells.” Physica Status Solidi (C), vol. 12, no. 4–5, Wiley, 2015, pp. 469–72, doi:10.1002/pssc.201400154.
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