High current density GaAs/Si rectifying heterojunction by defect free Epitaxial Lateral overgrowth on Tunnel Oxide from nano-seed - Sorbonne Université Access content directly
Journal Articles Scientific Reports Year : 2016

High current density GaAs/Si rectifying heterojunction by defect free Epitaxial Lateral overgrowth on Tunnel Oxide from nano-seed

Laetitia Vincent

Abstract

Interest in the heteroepitaxy of GaAs on Si has never failed in the last years due to the potential for monolithic integration of GaAs-based devices with Si integrated circuits. But in spite of this effort, devices fabricated from them still use homo-epitaxy only. Here we present an epitaxial technique based on the epitaxial lateral overgrowth of micrometer scale GaAs crystals on a thin SiO2 layer from nanoscale Si seeds. This method permits the integration of high quality and defect-free crystalline GaAs on Si substrate and provides active GaAs/Si heterojunctions with efficient carrier transport through the thin SiO2 layer. The nucleation from small width openings avoids the emission of misfit dislocations and the formation of antiphase domains. With this method, we have experimentally demonstrated for the first time a monolithically integrated GaAs/Si diode with high current densities of 10 kA.cm−2 for a forward bias of 3.7 V. This epitaxial technique paves the way to hybrid III–V/Si devices that are free from lattice-matching restrictions, and where silicon not only behaves as a substrate but also as an active medium.
Fichier principal
Vignette du fichier
srep25328.pdf (911.78 Ko) Télécharger le fichier
Origin Publication funded by an institution
Loading...

Dates and versions

hal-01316731 , version 1 (17-05-2016)

Licence

Identifiers

Cite

Charles Renard, Timothée Molière, Nikolay Cherkashin, José Alvarez, Laetitia Vincent, et al.. High current density GaAs/Si rectifying heterojunction by defect free Epitaxial Lateral overgrowth on Tunnel Oxide from nano-seed. Scientific Reports, 2016, 6, pp.25328. ⟨10.1038/srep25328⟩. ⟨hal-01316731⟩
805 View
197 Download

Altmetric

Share

Gmail Mastodon Facebook X LinkedIn More