Transparent Conductive Oxide‐Free Graphene‐Based Perovskite Solar Cells with over 17% Efficiency

Highly efficient transparent conductive oxide (TCO)-free perovskite (CH3NH3PbI3) solar cells are demonstrated by using a graphene transparent anode and organic carrier transport materials. By adding a few nanometer-thick MoO3 layer, wettability and work function of the graphene electrode are enhanced to enable a 17.1% power conversion efficiency, which is so far the highest efficiency for TCO-free solar cells. 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.