Abstract
The carrier statistics in LED structures with ultrathin multilayer InGaN insertions in a GaN matrix was studied. The optical data obtained indicate that an array of quantum dots (QDs) is formed in these structures. The QDs are scattered in size, which leads to an inhomogeneous broadening of the energy spectrum of carriers localized in the QDs. It is shown that, despite the suppressed transport of carriers between QDs, carriers are distributed among the levels of the QD array quasi-statistically at temperatures of about room temperature and higher. This makes it possible to describe the carrier injection and recombination in the device structures studied in terms of quasi-Fermi levels for electrons and holes.
Similar content being viewed by others
References
I. L. Krestnikov, N. N. Ledentsov, A. Hoffmann, et al., Phys. Rev. B 66, 155310 (2002).
S. Chichibu, T. Sota, K. Wada, and S. Nakamura, J. Vac. Sci. Technol. B 16, 2204 (1998).
T. Mukai, M. Yamada, and S. Nakamura, Jpn. J. Appl. Phys. 38, 3976 (1999).
K. L. Teo, J. S. Colton, P. Y. Yu, et al., Appl. Phys. Lett. 73, 1697 (1998).
H. Kudo, T. Tanbe, H. Ishibashi, et al., J. Appl. Phys. 89, 5779 (2001).
L. V. Asryan and R. A. Suris, Semicond. Sci. Technol. 11, 554 (1996).
M. V. Maximov, D. S. Sizov, L. V. Asryan, et al., in Proceedings of 26th International Conference on the Physics of Semiconductors (Edinburgh, 2002).
R. W. Martin, P. G. Middelton, K. P. O’Donnell, and W. Van der Stricht, Appl. Phys. Lett. 74, 263 (1999).
S. F. Chichibu, T. Azuhata, T. Sota, et al., J. Appl. Phys. 88, 5153 (2000).
Author information
Authors and Affiliations
Additional information
__________
Translated from Fizika i Tekhnika Poluprovodnikov, Vol. 39, No. 4, 2005, pp. 492–496.
Original Russian Text Copyright © 2005 by D. Sizov, V. Sizov, Zavarin, Lundin, Fomin, Tsatsul’nikov, Ledentsov.
Rights and permissions
About this article
Cite this article
Sizov, D.S., Sizov, V.S., Zavarin, E.E. et al. A study of carrier statistics in InGaN/Gan LED structures. Semiconductors 39, 467–471 (2005). https://doi.org/10.1134/1.1900264
Received:
Accepted:
Issue Date:
DOI: https://doi.org/10.1134/1.1900264