▎ 摘　　要

We report a systematic study on the effect of graphene vs. reduced graphene oxide interfacial layers on the electrochromic properties of most widely used electrochromes; i.e. methyl viologen, PEDOT, Prussian blue and WO3. As a conclusive finding, an improved electrochromic switching kinetics is observed on reduced graphene oxide in comparison to the pristine graphene sheets possibly due to the heterogeneous electron transfer in graphene materials. (C) 2015 Elsevier Ltd. All rights reserved.