An Alternative Hole Transport Layer for Both ITO‐ and Graphene‐Based Organic Solar Cells
Abstract
A new type of hole transport layer, polythiophene derivative, for organic solar cells is introduced, which shows similar transparency and good wettability for both indium tin oxide (ITO) and graphene compared to poly(3,4‐ethylenedioxythiophene):poly(styrenesulfonate) (PEDOT:PSS). Efficient graphene‐based organic solar cells are demonstrated and shows power conversion efficiencies approaching those of ITO‐based reference devices using the proposed hole transport layer.
This work was supported by Eni S.p.A. under the Eni‐MIT Alliance Solar Frontiers Program. The authors acknowledge access to Shared Experimental Facilities provided by the MIT Center for Materials Science Engineering supported in part by MRSEC Program of National Science Foundation under award number DMR–0213282. The authors also gratefully acknowledge Professor Vladimir Bulović for the use of experimental equipment for device fabrication and testing.
