▎ 摘　　要

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. (C) 2013 Elsevier Ltd. All rights reserved.