Broad Work‐Function Tunability of p‐Type Conjugated Polyelectrolytes for Efficient Organic Solar Cells

p-Type conjugated polyelectrolytes (CPEs) are developed as organic-based work-function-modifier materials for the broad work-function (WF) tunability of various metal electrodes. Facile oxidative treatments of n-type CPEs using various oxidants produce unprecedented p-type CPEs with reversed electronic properties corresponding to n-type CPEs, resulting in fine WF tuning of adjacent metal electrodes. This change leads to substantial increases in power conversion efficiency and lifetime of organic 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.