▎ 摘　　要

We have developed self-assembled copper (Cu) micro-labyrinth (ML) with graphene skin for transparent flexible electrodes of optoelectronic devices. The Cu ML is simply formed by heating a thin Cu film with a 100-nm thickness on a SiO2/Si substrate at 950 degrees C under hydrogen ambient to block the oxidation. Moreover, the Cu ML can have graphene skin at the surface by inserting carbo-hydroxyl molecules (CxHy) during heating due to the catalytic decomposition of C-H bonds on the Cu surface. The Cu ML with graphene skin (Cu ML-G) has superior sheet resistivity below 5 Omega/sq and mechanical flexibility without cracks at the bending radius of 0.1 cm. Although the transmittance of Cu ML-G is a little lower (70%similar to 80%) than that of conventional metallic nanowires electrodes (such as Ag, similar to 90% at the visible wavelength), it has good thermal stability in conductivity without any damage at 200 degrees C due to a micro-sized pattern and graphene skin which prohibits the surface migration of Cu atoms.