Field emission from vertical graphene sheets formed by screen-printing technique

Vertical graphene field emission cathodes were fabricated using screen-printing and the following selective photoetching techniques. Excellent field emission properties of the screen-printed vertical graphene film were obtained with low turn on field, high maximum current density, and large field en...

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Bibliographic Details
Published in:Vacuum 2013-08, Vol.94, p.48-52
Main Authors: Wu, Chaoxing, Li, Fushan, Zhang, Yongai, Guo, Tailiang
Format: Article
Language:English
Subjects:
Anchoring
Devices
Emission stability
Field emission
Graphene
Negative feedback
Photoetching
Stability
Variability
Vertical alignment
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Summary:Vertical graphene field emission cathodes were fabricated using screen-printing and the following selective photoetching techniques. Excellent field emission properties of the screen-printed vertical graphene film were obtained with low turn on field, high maximum current density, and large field enhancement factor. The organic layer anchoring the vertical graphene sheets acted as negative feedback layer, which contributed to the high uniformity and stability of the field emission device. The results pave the low-cost way for applications of graphenes in large-scale field emission devices. ► Vertical graphene field emission cathode was formed by screen-printing. ► Excellent field emission properties of the vertical graphene sheets were obtained. ► The organic layer anchoring the graphene sheets acted as negative feedback layer. ► The graphene-based field emission device has good emission stability.
ISSN:0042-207X
1879-2715
DOI:10.1016/j.vacuum.2013.01.016