Solution‐Processed (Graphene Oxide)–(d⁰ Transition Metal Oxide) Composite Anodic Buffer Layers toward High‐Performance and Durable Inverted Polymer Solar Cells

Composite anodic buffer layers composed of solution-processed graphene oxide and vanadium oxide (GO/VOx) exhibit a significant enhancement in their electron-blocking properties and sol–gel-precursor blocking abilities, compared to buffer layers of only the d0 transition metal oxide. Such composites enable inverted polymer solar cells to have high open-circuit voltage and fill factor values, as well as the highest power conversion efficiency to date of 6.7%, shedding light on how stable and cost-effective whole-solution-processed polymer solar cells may be 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.