A Cu Nanoparticles-Assisted-Catalysis Method Enables Controllably Direct Growth of Graphene Transparent Conductive Films on SiO₂ Nanospheres Antireflection Layer

The regulation of catalyst distribution is crucial to enhance transmittance of graphene transparent conductive films (TCFs) maintaining their high electrical properties in the chemical vapor deposition (CVD) process. We successfully regulated the distribution of Cu nanoparticles (NPs) and realized the controllable deposition of graphene on the insulating substrates coated with SiO₂ nanospheres antireflection (SiO₂ NSs AR). The graphene/SiO₂ NSs AR composite TCFs prepared with optimized conditions have transmittance of 95.86 % and sheet resistance of 0.934 kΩ ⋅ sq⁻¹. Compared with graphene TCFs with a whole coated distribution of Cu NPs, the optical properties of graphene/SiO₂ NSs AR composite TCFs were significantly improved. Meanwhile, it can maintain a comparable or even lower sheet resistance. This method is easier-operational, low-cost and lays a foundation for preparing high-quality graphene TCFs for future electronic devices.