Silicon Naphthalocyanine Tetraimides: Cathode Interlayer Materials for Highly Efficient Organic Solar Cells

Chunsheng Cai; Jia Yao; Lie Chen; Zhongyi Yuan; Zhi-Guo Zhang; Yu Hu; Xiaohong Zhao; Youdi Zhang; Yiwang Chen; Yongfang Li

doi:10.1002/anie.202106364

Silicon Naphthalocyanine Tetraimides: Cathode Interlayer Materials for Highly Efficient Organic Solar Cells

Angew Chem Int Ed Engl. 2021 Aug 23;60(35):19053-19057. doi: 10.1002/anie.202106364. Epub 2021 Jul 20.

Authors

Affiliations

¹ College of Chemistry/Institute of Polymers and Energy Chemistry, Nanchang University, 999 Xuefu Avenue, Nanchang, 330031, China.
² State Key Laboratory of Organic/Inorganic Composites, Beijing Advanced Innovation Center for Soft Matter Science and Engineering, Beijing University of Chemical Technology, Beijing, 100029, China.
³ Beijing National Laboratory for Molecular Sciences, CAS Key Laboratory of Organic Solids, Institute of Chemistry, Chinese Academy of Sciences, Beijing, 100190, China.

PMID: 34160863
DOI: 10.1002/anie.202106364

Abstract

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 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 %.

Keywords: cathode interlayer materials; organic solar cells; phthalocyanine; synthesis design.

Abstract

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