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Effects of Hydrogen Plasma Treatment on the Electrical Behavior of Solution-Processed ZnO Thin Films.

Park, Ji-In; Lee, Hyun Uk; Pearson, Christopher; Petty, Michael C; Jeong, Yesul

Effects of Hydrogen Plasma Treatment on the Electrical Behavior of Solution-Processed ZnO Thin Films. Thumbnail


Authors

Ji-In Park

Hyun Uk Lee

Christopher Pearson

Michael C Petty

Yesul Jeong



Abstract

In this study, the effect of atmospheric hydrogen plasma treatment on the in-plane conductivity of solution-processed zinc oxide (ZnO) in various environments is reported. The hydrogen-plasma-treated and untreated ZnO films exhibited ohmic behavior with room-temperature in-plane conductivity in a vacuum. When the untreated ZnO film was exposed to a dry oxygen environment, the conductivity rapidly decreased, and an oscillating current was observed. In certain cases, the thin film reversibly 'switched' between the high- and low-conductivity states. In contrast, the conductivity of the hydrogen-plasma-treated ZnO film remained nearly constant under different ambient conditions. We infer that hydrogen acts as a shallow donor, increasing the carrier concentration and generating oxygen vacancies by eliminating the surface contamination layer. Hence, atmospheric hydrogen plasma treatment could play a crucial role in stabilizing the conductivity of ZnO films.

Journal Article Type Article
Acceptance Date May 30, 2024
Online Publication Date Jun 1, 2024
Publication Date Jun 1, 2024
Deposit Date Jul 10, 2024
Publicly Available Date Jul 10, 2024
Journal Materials
Print ISSN 1996-1944
Publisher MDPI
Peer Reviewed Peer Reviewed
Volume 17
Issue 11
Article Number 2673
DOI https://doi.org/10.3390/ma17112673
Keywords in-plane electrical conductivity, plasma treatment, solution process, effect of measurement condition, zinc oxide
Public URL https://durham-repository.worktribe.com/output/2520573

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