Fabrication of paper electrode by dry transfer of Ag NP and Ag NW

In this study, we found the simple and quick dry transfer method to fabricate a paper-based electrode for flexible printed circuit board (PCB). The conventional Ag nanoparticle (AgNP) suspension with high solid contents above ∼50 wt% was confirmed to be deposited on a super hydrophobic polyethylene terephthalate (SHP-PET) substrate without a special ink formulation or surface treatment of substrate. The AgNP layer on the SHP-PET was able to be transferred only onto the toner-printed region of the paper substrate during a simple lamination process, thereby realizing the patterned AgNP conductive lines on the paper substrates The AgNP/toner/paper electrodes were highly robust, showing no deterioration in conductivity after taping for 100 times. Moreover, the AgNP/toner/paper electrodes successfully functioned as flexible electrodes; thus, light emitting diodes connected to the AgNP/paper electrodes could be operated under folding deformation without significant loss of brightness.