Abstract
AbstractNaphthalocyanine derivatives (SiNcTI‐N and SiNcTI‐Br) were firstly used as excellent cathode interlayer materials (CIMs) in organic solar cells, via introducing four electron‐withdrawing imide groups and two hydrophilic alkyls. Both of them showed deep LUMO energy levels (below −3.90 eV), good thermal stability (Td >210 °C), and strong self‐doping property. The SiNcTI‐Br CIM displayed high conductivity (4.5×10−5 S cm−1) and electron mobility (7.81×10−5 cm2 V−1 s−1), which could boost the efficiencies of the PM6:Y6‐based OSCs over a wide range of CIM layer thicknesses (4–25 nm), with maximum efficiency of 16.71 %.
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