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Journal of Computational Electronics
Erschienen in: Journal of Computational Electronics 2/2015

01.06.2015

Monte Carlo simulation of hot carrier transport in III-N LEDs

verfasst von: Pyry Kivisaari, Jani Oksanen, Jukka Tulkki, Toufik Sadi

Erschienen in: Journal of Computational Electronics | Ausgabe 2/2015

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Abstract

Recent measurements aiming to resolve the origin of the efficiency droop in III-Nitride (III-N) light-emitting diodes (LEDs) have given invaluable information on the phenomenon and reinforced the interest for detailed device-level simulations. We have developed a microscopic device-level Monte Carlo model of electronic transport in III-N multi-quantum well (MQW) LEDs to analyze their operation in more detail and to increase the understanding of hot electrons generated by Auger recombination and electron overflow. In this work we apply the model to simulate the LED structure studied experimentally by Lin et al. (IEEE Photonics Technol Lett 24(18):1600, 2012) to compare the results to predictions given by the widely used drift-diffusion model and to investigate the relationship between the efficiency droop, Auger recombination, and the transport of hot electrons. To evaluate the reliability of the results and to enable comparison to other works, we also study how some of the most important uncertainties in the material parameters affect the results. In particular, we study how changing the polarization charges, properties of p-type GaN, and the sidevalley energy offset of the conduction band within the range reported in recent literature affects the results. Based on the results we discuss the difficulty to fit device-level models to measurements of the efficiency droop and the incomplete understanding of current transport in III-N MQW structures that might be limiting the development of next-generation optoelectronic devices.
Vorheriger Artikel Introduction to the Special Issue on “Simulation of GaN-based Light-Emitting Diodes”
Nächster Artikel Multiscale approaches for the simulation of InGaN/GaN LEDs

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Metadaten
Titel
Monte Carlo simulation of hot carrier transport in III-N LEDs
verfasst von
Pyry Kivisaari
Jani Oksanen
Jukka Tulkki
Toufik Sadi
Publikationsdatum
01.06.2015
Verlag
Springer US
Erschienen in
Journal of Computational Electronics / Ausgabe 2/2015
Print ISSN: 1569-8025
Elektronische ISSN: 1572-8137
DOI
https://doi.org/10.1007/s10825-015-0687-z

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