Cargando…
Controlling Intrinsic Quantum Confinement in Formamidinium Lead Triiodide Perovskite through Cs Substitution
[Image: see text] Lead halide perovskites are leading candidates for photovoltaic and light-emitting devices, owing to their excellent and widely tunable optoelectronic properties. Nanostructure control has been central to their development, allowing for improvements in efficiency and stability, and...
Autores principales: | , , , , , |
---|---|
Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
American Chemical Society
2022
|
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9245356/ https://www.ncbi.nlm.nih.gov/pubmed/35609245 http://dx.doi.org/10.1021/acsnano.2c02970 |
_version_ | 1784738726505611264 |
---|---|
author | Elmestekawy, Karim A. Wright, Adam D. Lohmann, Kilian B. Borchert, Juliane Johnston, Michael B. Herz, Laura M. |
author_facet | Elmestekawy, Karim A. Wright, Adam D. Lohmann, Kilian B. Borchert, Juliane Johnston, Michael B. Herz, Laura M. |
author_sort | Elmestekawy, Karim A. |
collection | PubMed |
description | [Image: see text] Lead halide perovskites are leading candidates for photovoltaic and light-emitting devices, owing to their excellent and widely tunable optoelectronic properties. Nanostructure control has been central to their development, allowing for improvements in efficiency and stability, and changes in electronic dimensionality. Recently, formamidinium lead triiodide (FAPbI(3)) has been shown to exhibit intrinsic quantum confinement effects in nominally bulk thin films, apparent through above-bandgap absorption peaks. Here, we show that such nanoscale electronic effects can be controlled through partial replacement of the FA cation with Cs. We find that Cs-cation exchange causes a weakening of quantum confinement in the perovskite, arising from changes in the bandstructure, the length scale of confinement, or the presence of δ(H)-phase electronic barriers. We further observe photon emission from quantum-confined regions, highlighting their potential usefulness to light-emitting devices and single-photon sources. Overall, controlling this intriguing quantum phenomenon will allow for its suppression or enhancement according to need. |
format | Online Article Text |
id | pubmed-9245356 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2022 |
publisher | American Chemical Society |
record_format | MEDLINE/PubMed |
spelling | pubmed-92453562022-07-01 Controlling Intrinsic Quantum Confinement in Formamidinium Lead Triiodide Perovskite through Cs Substitution Elmestekawy, Karim A. Wright, Adam D. Lohmann, Kilian B. Borchert, Juliane Johnston, Michael B. Herz, Laura M. ACS Nano [Image: see text] Lead halide perovskites are leading candidates for photovoltaic and light-emitting devices, owing to their excellent and widely tunable optoelectronic properties. Nanostructure control has been central to their development, allowing for improvements in efficiency and stability, and changes in electronic dimensionality. Recently, formamidinium lead triiodide (FAPbI(3)) has been shown to exhibit intrinsic quantum confinement effects in nominally bulk thin films, apparent through above-bandgap absorption peaks. Here, we show that such nanoscale electronic effects can be controlled through partial replacement of the FA cation with Cs. We find that Cs-cation exchange causes a weakening of quantum confinement in the perovskite, arising from changes in the bandstructure, the length scale of confinement, or the presence of δ(H)-phase electronic barriers. We further observe photon emission from quantum-confined regions, highlighting their potential usefulness to light-emitting devices and single-photon sources. Overall, controlling this intriguing quantum phenomenon will allow for its suppression or enhancement according to need. American Chemical Society 2022-05-24 2022-06-28 /pmc/articles/PMC9245356/ /pubmed/35609245 http://dx.doi.org/10.1021/acsnano.2c02970 Text en © 2022 The Authors. Published by American Chemical Society https://creativecommons.org/licenses/by/4.0/Permits the broadest form of re-use including for commercial purposes, provided that author attribution and integrity are maintained (https://creativecommons.org/licenses/by/4.0/). |
spellingShingle | Elmestekawy, Karim A. Wright, Adam D. Lohmann, Kilian B. Borchert, Juliane Johnston, Michael B. Herz, Laura M. Controlling Intrinsic Quantum Confinement in Formamidinium Lead Triiodide Perovskite through Cs Substitution |
title | Controlling
Intrinsic Quantum Confinement in Formamidinium
Lead Triiodide Perovskite through Cs Substitution |
title_full | Controlling
Intrinsic Quantum Confinement in Formamidinium
Lead Triiodide Perovskite through Cs Substitution |
title_fullStr | Controlling
Intrinsic Quantum Confinement in Formamidinium
Lead Triiodide Perovskite through Cs Substitution |
title_full_unstemmed | Controlling
Intrinsic Quantum Confinement in Formamidinium
Lead Triiodide Perovskite through Cs Substitution |
title_short | Controlling
Intrinsic Quantum Confinement in Formamidinium
Lead Triiodide Perovskite through Cs Substitution |
title_sort | controlling
intrinsic quantum confinement in formamidinium
lead triiodide perovskite through cs substitution |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9245356/ https://www.ncbi.nlm.nih.gov/pubmed/35609245 http://dx.doi.org/10.1021/acsnano.2c02970 |
work_keys_str_mv | AT elmestekawykarima controllingintrinsicquantumconfinementinformamidiniumleadtriiodideperovskitethroughcssubstitution AT wrightadamd controllingintrinsicquantumconfinementinformamidiniumleadtriiodideperovskitethroughcssubstitution AT lohmannkilianb controllingintrinsicquantumconfinementinformamidiniumleadtriiodideperovskitethroughcssubstitution AT borchertjuliane controllingintrinsicquantumconfinementinformamidiniumleadtriiodideperovskitethroughcssubstitution AT johnstonmichaelb controllingintrinsicquantumconfinementinformamidiniumleadtriiodideperovskitethroughcssubstitution AT herzlauram controllingintrinsicquantumconfinementinformamidiniumleadtriiodideperovskitethroughcssubstitution |