Mesoporous PbI2 Scaffold for High‐Performance Planar Heterojunction Perovskite Solar Cells

A mesoporous PbI2 scaffold is demonstrated to achieve high-performance planar heterojunction perovskite solar cells. A remarkable power conversion efficiency (PCE) of 15.7% is achieved under AM1.5G 100 mW cm−2 solar irradiation with almost no hysteresis. The morphologies of the PbI2 scaffolds can be programmed by a controlled nucleation and growth mechanism. Correlations between the PbI2 film morphology and device performance are established. 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.