Vapor induced Recrystallization of Methylammonium Tin Iodide Perovskite for Enhanced Stability

Singh, A and Avasthi, S (2018) Vapor induced Recrystallization of Methylammonium Tin Iodide Perovskite for Enhanced Stability. In: 7th IEEE World Conference on Photovoltaic Energy Conversion, WCPEC 2018, 10 - 15 June 2018, Waikoloa Village, pp. 518-521.

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Abstract

There is great interest in lead-free alternatives to hybrid organometallic lead halide perovskite. Unfortunately, methylammonium tin iodide (MASnI3) is not stable in ambient due to prompt oxidation of Sn+2 to Sn+4. The rate of degradation depends on morphology of the film. In this work, we demonstrate a post-deposition treatment that improves the grain size of MASnI3 films from 100-150 nm to 1-2 microns, one of the highest numbers ever reported for this material. The films are highly crystalline, and show extended near infrared absorption showing suppressed tin oxidation and improved stability in ambient.

Item Type:	Conference Paper
Publication:	2018 IEEE 7th World Conference on Photovoltaic Energy Conversion, WCPEC 2018 - A Joint Conference of 45th IEEE PVSC, 28th PVSEC and 34th EU PVSEC
Publisher:	Institute of Electrical and Electronics Engineers Inc.
Additional Information:	The copyright for this article belongs to Institute of Electrical and Electronics Engineers Inc.
Keywords:	Convergence of numerical methods; Crystallization; Energy conversion; Grain boundaries; Infrared devices; Lead compounds; Light absorption; Organometallics; Perovskite; Recrystallization (metallurgy), Enhanced stability; Grain size; Halide perovskites; Lead-free perovskites; Near-infrared absorption; Post deposition treatment; Tin oxidations; Tin-iodide, Tin compounds
Department/Centre:	Division of Interdisciplinary Sciences > Centre for Nano Science and Engineering
Date Deposited:	04 Aug 2022 06:00
Last Modified:	04 Aug 2022 06:00
URI:	https://eprints.iisc.ac.in/id/eprint/75143

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