Stretchable interfaces with conformal contact

Abstract

Without conformal contact, stretchable electronic devices are significantly degraded during device operation and post treatment, due to air trapping and the resulting formation of uneven surface. In this work, under the hard condition that a stretchable polyacrylate elastomer (VHB) layer with high porosity which can lead to more pore formation at the VHB interface is introduced in the stretchable device preparation, conformal contact is achieved by vacuum process (VP). Planar images indicate that, although the conventional process results in the formation of pore with a size of 0.1 mm at the vacuum pressure of 10-6 Torr, the VP prevents it until 10-6 Torr. Surface analysis using near-edge X-ray absorption fine structure indicates the VP leads to less corrugation in the surface of graphene electrode located near the VHB; thus, finally resulting in significantly higher performance of an organic light emitting diode having the VHB and the graphene.