Abstract
Perovskite materials are sensitive to environmental conditions. Here we report the synthesis and characterization of a hydrophobic alkylammonium lead(ll) iodide perovskite with enhanced stability in water. Water stability was achieved by growing a shell of 4-[(N-3-butyne)carbox-yamido]anilinium lead(ll) iodide over methylammonium lead(ll) iodide. As a proof of concept, the water-splitting reaction was performed using our new material coated on TiO2, and a 7-fold increase in applied bias photon-to-current efficiency was observed as compared with standard p25-TiO2. Such simple and versatile chemical modification to induce high water stability is useful toward exploring new applications for the perovskite materials.
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Acknowledgments
The authors gratefully acknowledge the financial support from the Technology System Development program of the Department of Science and Technology, Government of India via project DST/TSG/SH/2011/106. S. S. and S. V. acknowledge the funding support from the National University of Singapore under the joint Ph.D. program between NUS and IITK. S. S. K. acknowledges the Centre for Environmental Science & Engineering, Thematic Unit of Excellence on Soft Nanofabrication, IITK.
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The supplementary material for this article can be found at https://doi.org/10.1557/mrc.2018.56
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Sasmal, S., Valiyaveettil, S., Upadhyay, A.P. et al. Alkyne-modified water-stable alkylammonium lead (II) iodide perovskite. MRS Communications 8, 289–296 (2018). https://doi.org/10.1557/mrc.2018.56
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DOI: https://doi.org/10.1557/mrc.2018.56