@article{2851d2aeae1a4db0afb0ab811f6d6cc9,
title = "Implementing Dopant-Free Hole-Transporting Layers and Metal-Incorporated CsPbI2Br for Stable All-Inorganic Perovskite Solar Cells",
abstract = "Mixed-halide CsPbI2Br perovskite is promising for efficient and thermally stable all-inorganic solar cells; however, the use of conventional antisolvent methods and additives-based hole-transporting layers (HTLs) currently hampers progress. Here, we have employed hot-air-assisted perovskite deposition in ambient condition to obtain high-quality photoactive CsPbI2Br perovskite films and have extended stable device operation using metal cation doping and dopant-free hole-transporting materials. Density functional theory calculations are used to study the structural and optoelectronic properties of the CsPbI2Br perovskite when it is doped with metal cations Eu2+ and In3+. We experimentally incorporated Eu2+ and In3+ metal ions into CsPbI2Br films and applied dopant-free copper(I) thiocyanate (CuSCN) and poly(3-hexylthiophene) (P3HT)-based materials as low-cost hole transporting layers, leading to record-high power conversion efficiencies of 15.27% and 15.69%, respectively, and a retention of >95% of the initial efficiency over 1600 h at 85 °C thermal stress.",
author = "Mali, {Sawanta S.} and Patil, {Jyoti V.} and Steele, {Julian A.} and Rondiya, {Sachin R.} and Dzade, {Nelson Y.} and Hong, {Chang Kook}",
note = "Funding Information: This work was supported by the Korea Research Fellowship Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Science, ICT, and Future Planning (2016H1D3A1909289) for awarding an outstanding overseas young researcher to S.S.M. This work was also supported by Korea Research Fellowship Program through the National Research Foundation of Korea (NRF) (2020R1A2C2004880). This research is also supported by the National Research Foundation of Korea (NRF) (NRF-2017R1A2B4008117) and (NRF-2018R1A6A1A03024334). This work was also supported by the National Research Foundation of Korea (NRF) grant funded by the Korea government (MSIT) (2018R1C1B6008218). J.A.S. acknowledges financial support from the Research Foundation - Flanders (FWO: Grant No. 12Y7221N). The authors thank Mrs. Young Hee Jung for providing FIB analysis. Authors would like to thank Prof. Gustavo de Miguel for valuable discussion on UV-vis absorption analysis and valuable suggestions during preparation and revision of this manuscript. S.R.R. and N.Y.D. acknowledge the UK Engineering and Physical Sciences Research Council (EPSRC) for funding (Grant No. EP/S001395/1). This work made use of the ARCHER UK National Supercomputing Service (http://www.archer.ac.uk) via our membership of the UK's HEC Materials Chemistry Consortium, which is also funded by the EPSRC (EP/L000202). The computational facilities of the Advanced Research Computing at Cardiff (ARCCA) Division, Cardiff University, and HPC Wales were also used in the completion of this work. Publisher Copyright: {\textcopyright} 2021 American Chemical Society.",
year = "2021",
month = feb,
day = "12",
doi = "10.1021/acsenergylett.0c02385",
language = "English (US)",
volume = "6",
pages = "778--788",
journal = "ACS Energy Letters",
issn = "2380-8195",
publisher = "American Chemical Society",
number = "2",
}