| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 8014412 | Materials Letters | 2018 | 4 Pages |
Abstract
Using photo-Kelvin Probe Force Microscopy (photo-KPFM) we observed macroscopic, photo-induced polarization through 200â¯nm thick polycrystalline methylammonium lead triiodide (MAPbI3) perovskite films in MAPbI3/charge carrier transport material (CTM) bilayers. A polarization of up to â¼600â¯mV was observed for some MAPbI3/CTM bilayers and the sign of polarization is dependent on the predominant charge carrier properties of the CTM used. We propose that through-film photo-KPFM polarization measurements can be useful in determining the efficacy of a CTM. Polarized perovskite films may also have applications as surfaces for performing electrochemical reactions.
Related Topics
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Nanotechnology
Authors
Lawrence A. Renna, Yao Liu, Thomas P. Russell, Monojit Bag, D. Venkataraman,