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Hydrogen and the Light-Induced Bias Instability Mechanism in Amorphous Oxide Semiconductors.

Abstract：

:Hydrogen is known to be present as an impurity in amorphous oxide semiconductors at the 0.1% level. Using amorphous ZnO as a simplified model system, we show that the hydrogens pair up at oxygen vacancies in the amorphous network, where they form metal-H-metal bridge bonds. These bonds are shown to create filled defect gap states lying just above the valence band edge and they are shown to give a consistent mechanism to explain the negative bias illumination stress instability found in oxide semiconductors like In-Ga-Zn-O (IGZO).

journal_name

Sci Rep

journal_title

Scientific reports

authors

Li H,Guo Y,Robertson J

doi

10.1038/s41598-017-17290-5

subject

Has Abstract

pub_date

2017-12-04 00:00:00

pages

16858

issue

1

issn

2045-2322

pii

10.1038/s41598-017-17290-5

journal_volume

7

pub_type

杂志文章

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