UV nanophotodetector based on a single ZnO:Au nanowire functionalized with Au-nanoparticles

V. Postica; Th. Pauporté; B. Viana; H. Cavers; M. Hoppe; R. Adelung; O. Lupan

doi:10.1117/12.2548136

5 March 2020 UV nanophotodetector based on a single ZnO:Au nanowire functionalized with Au-nanoparticles

V. Postica, Th. Pauporté, B. Viana, H. Cavers, M. Hoppe, R. Adelung, O. Lupan

Proceedings Volume 11281, Oxide-based Materials and Devices XI; 112812C (2020) https://doi.org/10.1117/12.2548136
Event: SPIE OPTO, 2020, San Francisco, California, United States

Abstract

In this work, an individual nanowire of zinc oxide (ZnO-NW), decorated with gold nanoparticles (Au-NPs/ZnO-NW), was integrated in a nanophotodetector using a dual beam focused electron/ion beam (FIB/SEM) system. Au-NPs/ZnO-NW arrays were synthesized by one-step electrochemical deposition at relative low-temperatures (90 °C). The nanodevice fabricated with a single nanowire Au-NPs/ZnO-NW demonstrated fast detection of UV radiation up to the operating temperature of 120 °C. The improved UV sensing properties of an individual Au-NPs/ZnO-NW compared to a single, undecorated, ZnO NW was explained based on the formation of Schottky barriers at the Au/ZnO NW interface, which resulted in a much more narrowed conduction channel and a lower dark current. These results prove that high-performance hybrid nanomaterials may possess superior electrical, optical and sensing properties and are of great interest for further fundamental studies.

Citation Download Citation

V. Postica, Th. Pauporté, B. Viana, H. Cavers, M. Hoppe, R. Adelung, and O. Lupan "UV nanophotodetector based on a single ZnO:Au nanowire functionalized with Au-nanoparticles", Proc. SPIE 11281, Oxide-based Materials and Devices XI, 112812C (5 March 2020); https://doi.org/10.1117/12.2548136

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KEYWORDS

Ultraviolet radiation

Zinc oxide

Gold

Nanowires

Nanolithography

Photodetectors

Nanoparticles

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