1. Qian Kang, Long Ye, Bowei Xu*, Cunbin An, Samuel J. Stuard, Shaoqing Zhang, Huifeng Yao, Harald Ade, and Jianhui Hou*,  A Printable Organic  Cathode Interlayer Enables over 13% Efficiency for 1-cm² Organic Solar Cells, Joule. 3,1-13