Kang, Zhenjing Chen, Shan-Ci Ma, Yunlong Wang, Jianbin Zheng, Qingdong Push–Pull Type Non-Fullerene Acceptors for Polymer Solar Cells: Effect of the Donor Core There has been a growing interest in the design and synthesis of non-fullerene acceptors for organic solar cells that may overcome the drawbacks of the traditional fullerene-based acceptors. Herein, two novel push–pull (acceptor–donor–acceptor) type small-molecule acceptors, that is, <b>ITDI</b> and <b>CDTDI</b>, with indenothiophene and cyclopentadithiophene as the core units and 2-(3-oxo-2,3-dihydroinden-1-ylidene)­malononitrile (<b>INCN</b>) as the end-capping units, are designed and synthesized for non-fullerene polymer solar cells (PSCs). After device optimization, PSCs based on <b>ITDI</b> exhibit good device performance with a power conversion efficiency (PCE) as high as 8.00%, outperforming the <b>CDTDI</b>-based counterparts fabricated under identical condition (2.75% PCE). We further discuss the performance of these non-fullerene PSCs by correlating the energy level and carrier mobility with the core of non-fullerene acceptors. These results demonstrate that indenothiophene is a promising electron-donating core for high-performance non-fullerene small-molecule acceptors. power conversion efficiency;CDTDI;Polymer Solar Cells;non-fullerene small-molecule acceptors;INCN;core;ITDI;non-fullerene acceptors;PCE;PSC 2017-07-05
    https://acs.figshare.com/articles/journal_contribution/Push_Pull_Type_Non-Fullerene_Acceptors_for_Polymer_Solar_Cells_Effect_of_the_Donor_Core/5198542
10.1021/acsami.7b05417.s001