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Structural properties of MBE AlInN and AlGaInN barrier layers for GaN-HEMT structures

✍ Scribed by Kirste, Lutz ;Lim, Taek ;Aidam, Rolf ;Müller, Stefan ;Waltereit, Patrick ;Ambacher, Oliver

Book ID
105365809
Publisher
John Wiley and Sons
Year
2010
Tongue
English
Weight
421 KB
Volume
207
Category
Article
ISSN
0031-8965

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✦ Synopsis

Abstract

A high‐resolution X‐ray diffraction and X‐ray reflectivity study of the structural properties of AlInN/GaN and AlGaInN/GaN high electron mobility transistor structures deposited by molecular beam epitaxy on metal organic chemical vapor deposition GaN/Al~2~O~3~ and GaN/SiC templates is presented. A new AlN/GaN/AlN triple‐interlayer is implemented to improve the interface properties between barrier layer and GaN buffer for a higher mobility of the polarization induced two‐dimensional electron gas. Layer properties and structural parameters like concentration, interface quality, layer thickness, strain and crystalline perfection are analyzed. Best structural properties are achieved for an AlGaInN layer with AlN/GaN/AlN interlayer deposited on a GaN/4H‐SiC (00.1) template.

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