Characterizations of Ohmic and Schottky-behaving contacts of a single ZnO nanowire

Bogdan Bercu; Wei Geng; Olivier Simonetti; Sergei Kostcheev; Corinne Sartel; Vincent Sallet; Gilles Lerondel; Michaël Molinari; Louis Giraudet; Christophe Couteau

Characterizations of Ohmic and Schottky-behaving contacts of a single ZnO nanowire

Bogdan Bercu ¹ Wei Geng ² Olivier Simonetti ¹ Sergei Kostcheev ² Corinne Sartel ³ Vincent Sallet ³ Gilles Lerondel ² Michaël Molinari ¹ Louis Giraudet ¹ Christophe Couteau ^{2, 4}

1 LRN - Laboratoire de Recherche en Nanosciences - EA 4682

2 LNIO - Laboratoire de Nanotechnologie et d'Instrumentation Optique

ICD - Institut Charles Delaunay

3 GEMAC - Groupe d'Etude de la Matière Condensée

4 UMI CINTRA - CNRS International NTU THALES Research Alliance

Abstract : Current–voltage and Kelvin probe force microscopy (KPFM) measurements were performed on single ZnO nanowires. Measurements are shown to be strongly correlated with the contact behavior, either Ohmic or diode-like. The ZnO nanowires were obtained by metallo-organic chemical vapor deposition (MOCVD) and contacted using electronic-beam lithography. Depending on the contact geometry, good quality Ohmic contacts (linear I–V behavior) or non-linear (diode-like) contacts were obtained. Current–voltage and KPFM measurements on both types of contacted ZnO nanowires were performed in order to investigate their behavior. A clear correlation could be established between the I–V curve, the electrical potential profile along the device and the nanowire geometry. Some arguments supporting this behavior are given based on technological issues and on depletion region extension. This work will help to better understand the electrical behavior of Ohmic contacts on single ZnO nanowires, for future applications in nanoscale field-effect transistors and nano-photodetectors.

Document type :

Journal articles

Domain :

Engineering Sciences [physics] / Micro and nanotechnologies/Microelectronics

Engineering Sciences [physics] / Optics / Photonic

Complete list of metadatas

https://hal-utt.archives-ouvertes.fr/hal-02297041
Contributor : Daniel Gavrysiak <>
Submitted on : Wednesday, September 25, 2019 - 4:45:16 PM
Last modification on : Thursday, September 26, 2019 - 1:26:07 AM

Characterizations of Ohmic and Schottky-behaving contacts of a single ZnO nanowire

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Characterizations of Ohmic and Schottky-behaving contacts of a single ZnO nanowire

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