Cargando…

Electron–phonon coupling in hybrid lead halide perovskites

Phonon scattering limits charge-carrier mobilities and governs emission line broadening in hybrid metal halide perovskites. Establishing how charge carriers interact with phonons in these materials is therefore essential for the development of high-efficiency perovskite photovoltaics and low-cost la...

Descripción completa

Detalles Bibliográficos
Autores principales: Wright, Adam D., Verdi, Carla, Milot, Rebecca L., Eperon, Giles E., Pérez-Osorio, Miguel A., Snaith, Henry J., Giustino, Feliciano, Johnston, Michael B., Herz, Laura M.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group 2016
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4894981/
https://www.ncbi.nlm.nih.gov/pubmed/27225329
http://dx.doi.org/10.1038/ncomms11755
_version_ 1782435757689929728
author Wright, Adam D.
Verdi, Carla
Milot, Rebecca L.
Eperon, Giles E.
Pérez-Osorio, Miguel A.
Snaith, Henry J.
Giustino, Feliciano
Johnston, Michael B.
Herz, Laura M.
author_facet Wright, Adam D.
Verdi, Carla
Milot, Rebecca L.
Eperon, Giles E.
Pérez-Osorio, Miguel A.
Snaith, Henry J.
Giustino, Feliciano
Johnston, Michael B.
Herz, Laura M.
author_sort Wright, Adam D.
collection PubMed
description Phonon scattering limits charge-carrier mobilities and governs emission line broadening in hybrid metal halide perovskites. Establishing how charge carriers interact with phonons in these materials is therefore essential for the development of high-efficiency perovskite photovoltaics and low-cost lasers. Here we investigate the temperature dependence of emission line broadening in the four commonly studied formamidinium and methylammonium perovskites, HC(NH(2))(2)PbI(3), HC(NH(2))(2)PbBr(3), CH(3)NH(3)PbI(3) and CH(3)NH(3)PbBr(3), and discover that scattering from longitudinal optical phonons via the Fröhlich interaction is the dominant source of electron–phonon coupling near room temperature, with scattering off acoustic phonons negligible. We determine energies for the interacting longitudinal optical phonon modes to be 11.5 and 15.3 meV, and Fröhlich coupling constants of ∼40 and 60 meV for the lead iodide and bromide perovskites, respectively. Our findings correlate well with first-principles calculations based on many-body perturbation theory, which underlines the suitability of an electronic band-structure picture for describing charge carriers in hybrid perovskites.
format Online
Article
Text
id pubmed-4894981
institution National Center for Biotechnology Information
language English
publishDate 2016
publisher Nature Publishing Group
record_format MEDLINE/PubMed
spelling pubmed-48949812016-06-21 Electron–phonon coupling in hybrid lead halide perovskites Wright, Adam D. Verdi, Carla Milot, Rebecca L. Eperon, Giles E. Pérez-Osorio, Miguel A. Snaith, Henry J. Giustino, Feliciano Johnston, Michael B. Herz, Laura M. Nat Commun Article Phonon scattering limits charge-carrier mobilities and governs emission line broadening in hybrid metal halide perovskites. Establishing how charge carriers interact with phonons in these materials is therefore essential for the development of high-efficiency perovskite photovoltaics and low-cost lasers. Here we investigate the temperature dependence of emission line broadening in the four commonly studied formamidinium and methylammonium perovskites, HC(NH(2))(2)PbI(3), HC(NH(2))(2)PbBr(3), CH(3)NH(3)PbI(3) and CH(3)NH(3)PbBr(3), and discover that scattering from longitudinal optical phonons via the Fröhlich interaction is the dominant source of electron–phonon coupling near room temperature, with scattering off acoustic phonons negligible. We determine energies for the interacting longitudinal optical phonon modes to be 11.5 and 15.3 meV, and Fröhlich coupling constants of ∼40 and 60 meV for the lead iodide and bromide perovskites, respectively. Our findings correlate well with first-principles calculations based on many-body perturbation theory, which underlines the suitability of an electronic band-structure picture for describing charge carriers in hybrid perovskites. Nature Publishing Group 2016-05-26 /pmc/articles/PMC4894981/ /pubmed/27225329 http://dx.doi.org/10.1038/ncomms11755 Text en Copyright © 2016, Nature Publishing Group, a division of Macmillan Publishers Limited. All Rights Reserved. http://creativecommons.org/licenses/by/4.0/ This work is licensed under a Creative Commons Attribution 4.0 International License. The images or other third party material in this article are included in the article's Creative Commons license, unless indicated otherwise in the credit line; if the material is not included under the Creative Commons license, users will need to obtain permission from the license holder to reproduce the material. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/
spellingShingle Article
Wright, Adam D.
Verdi, Carla
Milot, Rebecca L.
Eperon, Giles E.
Pérez-Osorio, Miguel A.
Snaith, Henry J.
Giustino, Feliciano
Johnston, Michael B.
Herz, Laura M.
Electron–phonon coupling in hybrid lead halide perovskites
title Electron–phonon coupling in hybrid lead halide perovskites
title_full Electron–phonon coupling in hybrid lead halide perovskites
title_fullStr Electron–phonon coupling in hybrid lead halide perovskites
title_full_unstemmed Electron–phonon coupling in hybrid lead halide perovskites
title_short Electron–phonon coupling in hybrid lead halide perovskites
title_sort electron–phonon coupling in hybrid lead halide perovskites
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4894981/
https://www.ncbi.nlm.nih.gov/pubmed/27225329
http://dx.doi.org/10.1038/ncomms11755
work_keys_str_mv AT wrightadamd electronphononcouplinginhybridleadhalideperovskites
AT verdicarla electronphononcouplinginhybridleadhalideperovskites
AT milotrebeccal electronphononcouplinginhybridleadhalideperovskites
AT eperongilese electronphononcouplinginhybridleadhalideperovskites
AT perezosoriomiguela electronphononcouplinginhybridleadhalideperovskites
AT snaithhenryj electronphononcouplinginhybridleadhalideperovskites
AT giustinofeliciano electronphononcouplinginhybridleadhalideperovskites
AT johnstonmichaelb electronphononcouplinginhybridleadhalideperovskites
AT herzlauram electronphononcouplinginhybridleadhalideperovskites