Flexible Large-Area Graphene Films of 50–600 nm Thickness with High Carrier Mobility

Highlights Large-area production of self-standing graphene nanofilm (~ 20 cm) through a clean ‘substrate replacement’ strategy. Realizing highly crystalline graphene nanofilms without micro-gasbags by introducing polymers. The graphene nanofilms demonstrate a solid light–matter interaction (photoelectric conversion in the mid-infrared and electromagnetic interference (EMI) shielding in X-band) with performance beyond state-of-the-art graphene/silicon diodes and EMI materials.