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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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 |
|---|---|
| Publication: | INTEGRATED FERROELECTRICS |
| Publisher: | TAYLOR & FRANCIS LTD |
| 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 Sciences > Centre for Nano Science and Engineering |
| 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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