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Silicon Naphthalocyanine Tetraimides: Cathode Interlayer Materials for Highly Efficient Organic Solar Cells
Author(s) -
Cai Chunsheng,
Yao Jia,
Chen Lie,
Yuan Zhongyi,
Zhang ZhiGuo,
Hu Yu,
Zhao Xiaohong,
Zhang Youdi,
Chen Yiwang,
Li Yongfang
Publication year - 2021
Publication title -
angewandte chemie
Language(s) - English
Resource type - Journals
eISSN - 1521-3757
pISSN - 0044-8249
DOI - 10.1002/ange.202106364
Subject(s) - cathode , organic solar cell , homo/lumo , materials science , imide , thermal stability , doping , silicon , electron mobility , energy conversion efficiency , chemical engineering , optoelectronics , chemistry , polymer chemistry , organic chemistry , polymer , molecule , composite material , engineering
Naphthalocyanine 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 (T d >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 cm 2 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 %.