Researchers from MIT developed a flexible transparent graphene-based electrode for graphene polymer solar cells (PSC). They report that this is the most efficient such electrode ever developed, with power conversion efficiencies of 6.1% (anode) and 7.1% (cathode).
To achieve the record efficiencies, the researchers thermally treated the MoO3 electron blocking layer and directly deposited a ZnO electron transporting layer on the graphene. The researchers say that the process is simple and reproducible.
As part of the research, they also demonstrated graphene-based flexible PSCs on polyethylene naphthalate substrates.