Nonvolatile memory devices based on electrical conductance tuning in poly(N-vinylcarbazole)-graphene composites

► Nonvolatile memory devices based on PVK-graphene composite are fabricated. ► Conductance behaviors can be tuned by controlling the content of graphene. ► The OFF and ON states of the WORM and rewritable memory devices are stable. ► Memory mechanism is deduced from the modeling of the currents in both states.