InxGa1-xP Nanowire Growth Dynamics Strongly Affected by Doping Using Diethylzinc

Forskningsoutput: TidskriftsbidragArtikel i vetenskaplig tidskrift

Abstract

Semiconductor nanowires are versatile building blocks for optoelectronic devices, in part because nanowires offer an increased freedom in material design due to relaxed constraints on lattice matching during the epitaxial growth. This enables the growth of ternary alloy nanowires in which the bandgap is tunable over a large energy range, desirable for optoelectronic devices. However, little is known about the effects of doping in the ternary nanowire materials, a prerequisite for applications. Here we present a study of p-doping of InxGa1-xP nanowires and show that the growth dynamics are strongly affected when diethylzinc is used as a dopant precursor. Specifically, using in situ optical reflectometry and high-resolution transmission electron microscopy we show that the doping results in a smaller nanowire diameter, a more predominant zincblende crystal structure, a more Ga-rich composition, and an increased axial growth rate. We attribute these effects to changes in seed particle wetting angle and increased TMGa pyrolysis efficiency upon introducing diethylzinc. Lastly, we demonstrate degenerate p-doping levels in InxGa1-xP nanowires by the realization of an Esaki tunnel diode. Our findings provide insights into the growth dynamics of ternary alloy nanowires during doping, thus potentially enabling the realization of such nanowires with high compositional homogeneity and controlled doping for high-performance optoelectronics devices.

Detaljer

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Forskningsområden

Ämnesklassifikation (UKÄ) – OBLIGATORISK

  • Den kondenserade materiens fysik

Nyckelord

Originalspråkengelska
Sidor (från-till)702-707
Antal sidor6
TidskriftNano Letters
Volym17
Utgivningsnummer2
StatusPublished - 2017 feb 8
PublikationskategoriForskning
Peer review utfördJa

Relaterad forskningsoutput

Otnes, G., 2018, Department of Physics, Lund University.

Forskningsoutput: AvhandlingDoktorsavhandling (sammanläggning)

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