Photostable Zn2SnO4 nanowire transistors for transparent displays

ACS Nano
Taekyung LimSanghyun Ju

Abstract

Although oxide nanowires offer advantages for next-generation transparent display applications, they are also one of the most challenging materials for this purpose. Exposure of semiconducting channel areas of oxide nanowire transistors produces an undesirable increase in the photocurrent, which may result in unstable device operation. In this study, we have developed a Zn(2)SnO(4) nanowire transistor that operates stably regardless of changes in the external illumination. In particular, after exposure to a light source of 2100 lx, the threshold voltage (V(th)) showed a negative shift of less than 0.4 V, and the subthreshold slope (SS) changed by ∼0.1 V/dec. ZnO or SnO(2) nanowire transistors, in contrast, showed 1.5-2.0 V negative shift in V(th) and an SS change of ∼0.3 V/dec under the same conditions. Furthermore, the Zn(2)SnO(4) nanowire transistors returned to their initial state immediately after the light source was turned off, unlike those using the other two nanowires. Thus, Zn(2)SnO(4) nanowires achieve photostability without the application of a black material or additional processing, minimizing the photocurrent effect for display devices.

References

Jul 21, 2006·The Journal of Physical Chemistry. B·Hanyuan ChenJianqi Li
Mar 16, 2007·Nano Letters·C SociD Wang
Oct 1, 2005·Nanotechnology·R B M CrossE M Sankara Narayanan
Dec 3, 2010·Journal of Nanoscience and Nanotechnology·Ming LeiDickon H L Ng
Jun 10, 2011·Nanotechnology·Ayan KarMitra Dutta

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Citations

Oct 27, 2015·Physical Chemistry Chemical Physics : PCCP·Partha Pratim DasParukuttyamma Sujatha Devi

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