Small‐Molecule Solar Cells with Fill Factors up to 0.75 via a Layer‐by‐Layer Solution Process

Y. Lin, L. Ma, Prof. Y. Li, Prof. Y. Liu, Prof. D. Zhu, Prof. X. Zhan Beijing National Laboratory for Molecular Sciences CAS Key Laboratory of Organic Solids Institute of Chemistry Chinese Academy of Sciences Beijing , 100190 , P. R. China E-mail: xwzhan@iccas.ac.cn Y. Lin, L. Ma University of Chinese Academy of Sciences Beijing , 100049 , P. R. China Prof. X. Zhan Department of Materials Science and Engineering College of Engineering Peking University Beijing , 100871 , P. R. China