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Alkyne-modified water-stable alkylammonium lead(II) iodide perovskite

Published online by Cambridge University Press:  16 April 2018

Sayantan Sasmal
Affiliation:
Department of Chemistry, National University of Singapore, 3 Science Drive 3, Singapore 117543, Singapore Materials Science Programme, Indian Institute of Technology Kanpur208016, UP, India
Suresh Valiyaveettil*
Affiliation:
Department of Chemistry, National University of Singapore, 3 Science Drive 3, Singapore 117543, Singapore Materials Science Programme, Indian Institute of Technology Kanpur208016, UP, India
Arun P. Upadhyay
Affiliation:
Department of Chemical Engineering, Materials Science Programme, Centre for Environmental Science & Engineering, Thematic Unit of Excellence on Soft Nanofabrication, Indian Institute of Technology Kanpur208016, UP, India
Raj Ganesh S. Pala*
Affiliation:
Department of Chemical Engineering, Materials Science Programme, Centre for Environmental Science & Engineering, Thematic Unit of Excellence on Soft Nanofabrication, Indian Institute of Technology Kanpur208016, UP, India
Sri Sivakumar*
Affiliation:
Department of Chemical Engineering, Materials Science Programme, Centre for Environmental Science & Engineering, Thematic Unit of Excellence on Soft Nanofabrication, Indian Institute of Technology Kanpur208016, UP, India
Dharmadoss Sornadurai
Affiliation:
Materials Science Group, Indira Gandhi Centre for Atomic Research, Kalpakkam 603102, India
Chakram S. Sundar
Affiliation:
Materials Science Group, Indira Gandhi Centre for Atomic Research, Kalpakkam 603102, India
*
Address all correspondence to Raj Ganesh S. Pala, Sri Sivakumar and Suresh Valiyaveettil, [email protected]; [email protected]; [email protected]
Address all correspondence to Raj Ganesh S. Pala, Sri Sivakumar and Suresh Valiyaveettil, [email protected]; [email protected]; [email protected]
Address all correspondence to Raj Ganesh S. Pala, Sri Sivakumar and Suresh Valiyaveettil, [email protected]; [email protected]; [email protected]
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Abstract

Perovskite materials are sensitive to environmental conditions. Here we report the synthesis and characterization of a hydrophobic alkylammonium lead(II) iodide perovskite with enhanced stability in water. Water stability was achieved by growing a shell of 4-[(N-3-butyne)carboxyamido]anilinium lead(II) iodide over methylammonium lead(II) 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.

Type
Research Letters
Copyright
Copyright © Materials Research Society 2018 

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