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Cation exchange assisted dimensional down-conversion of perovskite thin films using vapor annealing: An interplay of tolerance factor

Singh, Akash and Podapangi, Suresh Kumar and Avasthi, Sushobhan (2019) Cation exchange assisted dimensional down-conversion of perovskite thin films using vapor annealing: An interplay of tolerance factor. In: INTEGRATED FERROELECTRICS, 194 (1, SI). pp. 107-114.

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Official URL: https://doi.org/10.1080/10584587.2018.1514866

Abstract

This work demonstrates a method to form 1-D ethylammonium lead iodide (EAPbI(3)) thin-films by dimensional down-conversion of 3-D methylammonium lead iodide (MAPbI(3)) perovskite. The process leverages cation-exchange that occurs during exposure to ethylamine vapor and subsequent annealing. Based on the extensive materials characterization, a detailed mechanism of the transformation is proposed. The transformation also improves the morphology of the films, yielding compact EAPbI(3) films with roughness of 50-100 nm, low-pin-hole density, and grain-size of 1-3 mu m. The process can be used to fabricate various EAPbI(3) optoelectronic devices. Since lower dimensional perovskites are more stable against moisture than MAPbI(3), the process can also be used to fabricate 3D-1D graded perovskite interfaces for materials study and to stabilize MAPbI(3) solar cells with a protective outer layer of EAPbI(3.)

Item Type: Journal Article
Additional Information: Copyright of this article belongs to TAYLOR & FRANCIS LTD
Keywords: Cation exchange; dimensional down-conversion; perovskite thin films; tolerance factor; vapor annealing
Department/Centre: Division of Interdisciplinary Research > Centre for Nano Science and Engineering
Depositing User: LIS Interns
Date Deposited: 23 May 2019 09:54
Last Modified: 23 May 2019 09:54
URI: http://eprints.iisc.ac.in/id/eprint/62753

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