Bipolar Membrane‐Assisted Solar Water Splitting in Optimal pH

An efficient and intrinsically safe bias-free solar-driven water-splitting device composed of perovskite light harvesters, Earth-abundant catalysts, and a bipolar membrane is demonstrated. Overall, 10 mA cm−2 current density with 1.63 V bias voltage for electrochemical water splitting and 12.7% solar to hydrogen conversion efficiency for solar-driven water splitting are achieved. 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.