Self-Catalyzed Growth of Vertically Aligned InN Nanorods by Metal-Organic Vapor Phase Epitaxy

Tessarek C, Fladischer S, Dieker C, Sarau G, Hoffmann B, Bashouti M, Goebelt M, Heilmann M, Latzel M, Butzen E, Figge S, Gust A, Hoeflich K, Feichtner T, Buechele M, Schwarzburg K, Spiecker E, Christiansen S, Göbelt M (2016)

Publication Status: Published

Publication Type: Journal article

Publication year: 2016

Journal

Nano Letters American Chemical Society

Publisher: American Chemical Society

Book Volume: 16

Pages Range: 3415-3425

Journal Issue: 6

DOI: 10.1021/acs.nanolett.5b03889

Abstract

Vertically aligned hexagonal InN nanorods were grown mask-free by conventional metal organic vapor phase epitaxy without any foreign catalyst. The In droplets on top of the nanorod's indicate a self-catalytic vapor liquid solid growth mode. A systematic study on important growth parameters has been carried out for the optimization of nanorod morphology. The nanorod N-polarity, induced by high temperature nitridation of the sapphire substrate, IS necessary to achieve vertical growth. Hydrogen, usually inapplicable during InN growth due to formation of metallic indium, and silane are needed to enhance the aspect ratio and to reduce parasitic deposition beside the nanorods on the sapphire surface. The results reveal many similarities between InN and GaN nanorod growth showing that the process despite the large difference in growth temperature is similar. Transmission electron microscopy, spatially resolved energy-dispersive X-ray spectroscopy, X-ray diffraction, X-ray photoelectron spectroscopy, and Raman spectroscopy have been performed to analyze the structural properties. Spatially resolved cathodoluminescence investigations are carried out to verify the optical activity of the InN nanorods. The InN nanorods are expected to be the material of choice for high-efficiency hot carrier solar cells.

Authors with CRIS profile

Stefanie Rechberger Lehrstuhl für Werkstoffwissenschaften (Mikro- und Nanostrukturforschung) Christel Dieker Lehrstuhl für Werkstoffwissenschaften (Mikro- und Nanostrukturforschung) Björn Hoffmann Lehrstuhl für Experimentalphysik Michael Latzel Institut für Optik, Information und Photonik Erdmann Spiecker Lehrstuhl für Werkstoffwissenschaften (Mikro- und Nanostrukturforschung) Manuela Göbelt Lehrstuhl für Werkstoffwissenschaften (Mikro- und Nanostrukturforschung)

Additional Organisation(s)

Graduiertenkolleg 1896/2 In situ Mikroskopie mit Elektronen, Röntgenstrahlen und Rastersonden Exzellenz-Cluster Engineering of Advanced Materials (EAM) Interdisziplinäres Zentrum, Center for Nanoanalysis and Electron Microscopy (CENEM) Lehrstuhl für Werkstoffwissenschaften (Mikro- und Nanostrukturforschung)

Involved external institutions

Max-Planck-Institut für die Physik des Lichts (MPL) / Max Planck Institute for the Science of Light DE Germany (DE) Helmholtz-Zentrum Berlin für Materialien und Energie (HZB) DE Germany (DE) Universität Bremen DE Germany (DE)

How to cite

APA:

Tessarek, C., Fladischer, S., Dieker, C., Sarau, G., Hoffmann, B., Bashouti, M.,... Göbelt, M. (2016). Self-Catalyzed Growth of Vertically Aligned InN Nanorods by Metal-Organic Vapor Phase Epitaxy. Nano Letters, 16(6), 3415-3425. https://doi.org/10.1021/acs.nanolett.5b03889

MLA:

Tessarek, C., et al. "Self-Catalyzed Growth of Vertically Aligned InN Nanorods by Metal-Organic Vapor Phase Epitaxy." Nano Letters 16.6 (2016): 3415-3425.

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