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Benzodithiophene Hole‐Transporting Materials for Efficient Tin‐Based Perovskite Solar Cells
Author(s) -
Vegiraju Sureshraju,
Ke Weijun,
Priyanka Pragya,
Ni JenShyang,
Wu YiChing,
Spanopoulos Ioannis,
Yau Shueh Lin,
Marks Tobin J.,
Chen MingChou,
Kanatzidis Mercouri G.
Publication year - 2019
Publication title -
advanced functional materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 6.069
H-Index - 322
eISSN - 1616-3028
pISSN - 1616-301X
DOI - 10.1002/adfm.201905393
Subject(s) - materials science , perovskite (structure) , tin , halide , energy conversion efficiency , formamidinium , molecule , iodide , nanotechnology , optoelectronics , chemical engineering , inorganic chemistry , organic chemistry , chemistry , engineering , metallurgy
Developing efficient interfacial hole transporting materials (HTMs) is crucial for achieving high‐performance Pb‐free Sn‐based halide perovskite solar cells (PSCs). Here, a new series of benzodithiophene (BDT)‐based organic small molecules containing tetra‐ and di‐triphenyl amine donors prepared via a straightforward and scalable synthetic route is reported. The thermal, optical, and electrochemical properties of two BDT‐based molecules are shown to be structurally and energetically suitable to serve as HTMs for Sn‐based PSCs. It is reported here that ethylenediammonium/formamidinium tin iodide solar cells using BDT‐based HTMs deliver a champion power conversion efficiency up to 7.59%, outperforming analogous reference solar cells using traditional and expensive HTMs. Thus, these BDT‐based molecules are promising candidates as HTMs for the fabrication of high‐performance Sn‐based PSCs.