Journal of Modern Physics

Volume 3, Issue 8 (August 2012)

ISSN Print: 2153-1196   ISSN Online: 2153-120X

Google-based Impact Factor: 0.86  Citations  h5-index & Ranking

2-D Theoretical Model for Current–Voltage Characteristics in AlGaN/GaN HEMT’s

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DOI: 10.4236/jmp.2012.38115    10,920 Downloads   18,873 Views  Citations

ABSTRACT

A threshold-voltage-based 2-D theoretical model for the Current–Voltage characteristics of the AlGaN/GaN high electron mobility transistors (HEMT’s) is developed. The present work proposes an improved charge-control model by employing the Robin boundary condition when introduced the solution of the 2-D Poisson’s equation in the density of charge depleted in the AlGaN layer. The dependence of 2-DEG sheet carrier concentration on the aluminum composition and AlGaN layer thickness has been investigated in detail. Current–voltage characteristics developed from the 2-DEG model in order to take into account the impact of gate lengths. The relation between the kink effect and existing deep centers has also been confirmed by using an electrical approach, which can allow to adjust some of electron transport parameters in order to optimize the output current.

Share and Cite:

M. Charfeddine, H. Belmabrouk, M. Zaidi and H. Maaref, "2-D Theoretical Model for Current–Voltage Characteristics in AlGaN/GaN HEMT’s," Journal of Modern Physics, Vol. 3 No. 8, 2012, pp. 881-886. doi: 10.4236/jmp.2012.38115.

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