@article{8d7b9abe1fbb489687b7c4059a3cbf1d,
title = "Benzodithiophene Hole-Transporting Materials for Efficient Tin-Based Perovskite Solar Cells",
abstract = "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.",
keywords = "benzodithiophene, lead-free, perovskite solar cells, tin, triphenylamine",
author = "Sureshraju Vegiraju and Weijun Ke and Pragya Priyanka and Ni, {Jen Shyang} and Wu, {Yi Ching} and Ioannis Spanopoulos and Yau, {Shueh Lin} and Marks, {Tobin J.} and Chen, {Ming Chou} and Kanatzidis, {Mercouri G.}",
note = "Funding Information: S.V. and W.K. contributed equally to this work. This work was supported in part by the LEAP Center, an Energy Frontier Research Center funded by the U.S. Department of Energy, Office of Science, and Office of Basic Energy Sciences under Award No. DE-SC0001059 (solar cell fabrication and characterization). Work in sample synthesis, processing and structural characterization was supported by grant Department of Energy, Office of Science Grant No. SC0012541. This work made use of the EPIC facility (NUANCE Center-Northwestern University), which has received support from the MRSEC program (NSF DMR-1720139) at the Materials Research Center, and the Nanoscale Science and Engineering Center (EEC-0118025/003), both programs of the National Science Foundation; the State of Illinois; and Northwestern University. The support at National Central University was received from the Ministry of Science and Technology of Taiwan (MOST) and partially from Research Center of New Generation Light Driven Photovoltaic Modules. Publisher Copyright: {\textcopyright} 2019 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim",
year = "2019",
month = nov,
day = "1",
doi = "10.1002/adfm.201905393",
language = "English (US)",
volume = "29",
journal = "Advanced Functional Materials",
issn = "1616-301X",
publisher = "Wiley-VCH Verlag",
number = "45",
}