Please use this identifier to cite or link to this item:
https://doi.org/10.1021/acs.jpclett.1c00823
DC Field | Value | |
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dc.title | Local Energy Landscape Drives Long-Range Exciton Diffusion in Two-Dimensional Halide Perovskite Semiconductors | |
dc.contributor.author | Baldwin, Alan | |
dc.contributor.author | Delport, Geraud | |
dc.contributor.author | Leng, Kai | |
dc.contributor.author | Chahbazian, Rosemonde | |
dc.contributor.author | Galkowski, Krzysztof | |
dc.contributor.author | Loh, Kian Ping | |
dc.contributor.author | Stranks, Samuel D. | |
dc.date.accessioned | 2022-10-26T09:20:57Z | |
dc.date.available | 2022-10-26T09:20:57Z | |
dc.date.issued | 2021-04-20 | |
dc.identifier.citation | Baldwin, Alan, Delport, Geraud, Leng, Kai, Chahbazian, Rosemonde, Galkowski, Krzysztof, Loh, Kian Ping, Stranks, Samuel D. (2021-04-20). Local Energy Landscape Drives Long-Range Exciton Diffusion in Two-Dimensional Halide Perovskite Semiconductors. Journal of Physical Chemistry Letters 12 (16) : 4003-4011. ScholarBank@NUS Repository. https://doi.org/10.1021/acs.jpclett.1c00823 | |
dc.identifier.issn | 1948-7185 | |
dc.identifier.uri | https://scholarbank.nus.edu.sg/handle/10635/233862 | |
dc.description.abstract | Halide perovskites are versatile semiconductors with applications including photovoltaics and light-emitting devices, having modular optoelectronic properties realizable through composition and dimensionality tuning. Layered Ruddlesden-Popper perovskites are particularly interesting due to their unique 2D character and charge carrier dynamics. However, long-range energy transport through exciton diffusion in these materials is not understood or realized. Here, local time-resolved luminescence mapping techniques are employed to visualize exciton transport in exfoliated flakes of the BA2MAn-1PbnI3n+1 perovskite family. Two distinct transport regimes are uncovered, depending on the temperature range. Above 100 K, diffusion is mediated by thermally activated hopping processes between localized states. At lower temperatures, a nonuniform energy landscape emerges in which transport is dominated by downhill energy transfer to lower-energy states, leading to long-range transport over hundreds of nanometers. Efficient, long-range, and switchable downhill transfer offers exciting possibilities for controlled directional long-range transport in these 2D materials for new applications. © 2021 The Authors. Published by American Chemical Society. | |
dc.publisher | American Chemical Society | |
dc.rights | Attribution 4.0 International | |
dc.rights.uri | https://creativecommons.org/licenses/by/4.0/ | |
dc.source | Scopus OA2021 | |
dc.type | Article | |
dc.contributor.department | CHEMISTRY | |
dc.description.doi | 10.1021/acs.jpclett.1c00823 | |
dc.description.sourcetitle | Journal of Physical Chemistry Letters | |
dc.description.volume | 12 | |
dc.description.issue | 16 | |
dc.description.page | 4003-4011 | |
dc.published.state | Published | |
Appears in Collections: | Staff Publications Elements |
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