Carrier-transport studies of III-nitride/Si3N4/Si isotype heterojunctions

Kumar, Mahesh and Roul, Basanta and Bhat, Thirumaleshwara N and Rajpalke, Mohana K and Kalghatgi, AT and Krupanidhi, SB (2012) Carrier-transport studies of III-nitride/Si3N4/Si isotype heterojunctions. In: PHYSICA STATUS SOLIDI A-APPLICATIONS AND MATERIALS SCIENCE, 209 (5). pp. 994-997.

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Abstract

GaN/Si3N4/n-Si and InN/Si3N4/n-Si heterojunctions (HJs) were fabricated using plasma-assisted molecular beam epitaxy for a comparison study. Single-crystalline wurtzite structures of GaN and InN epilayers were confirmed by high-resolution X-ray diffraction and thickness of ultrathin Si3N4 layer was measured by transmission electron microscopy. n-GaN/Si3N4/n-Si HJs show diode-like rectifying current-voltage (I-V) characteristic, while n-InN/Si3N4/n-Si HJs show symmetric nonlinear I-V behavior. The I-V characteristics of both HJs were discussed in terms of the band diagram of HJs and the carrier transport mechanism. The activation energies of carrier conduction were estimated to be similar to 29 meV for GaN/Si3N4/Si and similar to 95 meV for InN/Si3N4/Si HJs. (C) 2012 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim

Item Type:	Journal Article
Publication:	PHYSICA STATUS SOLIDI A-APPLICATIONS AND MATERIALS SCIENCE
Publisher:	Wiley
Keywords:	heterojunctions; MBE; silicon nitrides; transport properties
Department/Centre:	Division of Chemical Sciences > Materials Research Centre
Date Deposited:	16 Jul 2012 10:03
Last Modified:	16 Jul 2012 10:03
URI:	http://eprints.iisc.ac.in/id/eprint/44597

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