Single-walled carbon nanotubes and graphene hybrid films with complementary properties are combined for use in high-performance transparent electrodes and field-effect transistors (FETs). Based on the transfer characteristics for the hybrid film-based FETs, an improved Ion/Ioff and on-state current are achieved, compared with pristine graphene. Notably, the hybrid film has a sheet resistance of 300 Ω/sq with 96.4% transparency. As a service to our authors and readers, this journal provides supporting information supplied by the authors. Such materials are peer reviewed and may be re-organized for online delivery, but are not copy-edited or typeset. Technical support issues arising from supporting information (other than missing files) should be addressed to the authors. Please note: The publisher is not responsible for the content or functionality of any supporting information supplied by the authors. Any queries (other than missing content) should be directed to the corresponding author for the article.