Simulation of the interfacial AlN layer on band structures and carrier densities of AlGaN/GaN HEMT structures

Liceşivdin S., KASAP M.

6TH International Conference of the Balkan Physical Union, İstanbul, Turkey, 22 August 2006 - 26 August 2007, vol.899, pp.622 identifier

  • Publication Type: Conference Paper / Full Text
  • Volume: 899
  • Doi Number: 10.1063/1.2733363
  • City: İstanbul
  • Country: Turkey
  • Page Numbers: pp.622
  • Gazi University Affiliated: Yes


At high electron mobility transistors (HEMT), increase of 2DEG earner density is an important issue to achieve high performance. Inserting a thin undoped AlN interfacial layer between undoped AlGaN barrier and undoped GaN channel layer is one of the methods to achieve high performance AlGaN/GaN HEMT structures. In this work, 1-band Schrödinger simulations on pseudomorphically grown undoped AlGaN/GaN HEMT structures with and without AlN interfacial layer have been done. The effects of AlN interfacial layer thicknesses on band structures, carrier densities and 2DEG eigenstates have been investigated. In addition, the effects of compositional AlGaN barrier layer have been showed for different layer thicknesses and different compositions. © 2007 American Institute of Physics.