Enhanced Environmental Stability of Planar Heterojunction Perovskite Solar Cells Based on Blade‐Coating

A simple and effective method to prepare air-processable perovskite films is ­developed. The blade-coated ­perovskite films feature self-assembled ­air-protection patches, and solar cells based on these film showed significantly improved air-­stability with high power conversion efficiencies up to 9.52%. It is also ­demonstrated that the blade-coating process is applicable to the fabrication of high efficiency (12.21%) perovskite 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.