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Real-time observation of the buildup of polaron in α-FAPbI(3)

The formation of polaron, i.e., the strong coupling process between the carrier and lattice, is considered to play a crucial role in benefiting the photoelectric performance of hybrid organic-inorganic halide perovskites. However, direct observation of the dynamical formation of polarons occurring a...

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Autores principales: Yue, Xingyu, Wang, Chunwei, Zhang, Bo, Zhang, Zeyu, Xiong, Zhuang, Zu, Xinzhi, Liu, Zhengzheng, Hu, Zhiping, Odunmbaku, George Omololu, Zheng, Yujie, Sun, Kuan, Du, Juan
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group UK 2023
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9938110/
https://www.ncbi.nlm.nih.gov/pubmed/36801865
http://dx.doi.org/10.1038/s41467-023-36652-4
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author Yue, Xingyu
Wang, Chunwei
Zhang, Bo
Zhang, Zeyu
Xiong, Zhuang
Zu, Xinzhi
Liu, Zhengzheng
Hu, Zhiping
Odunmbaku, George Omololu
Zheng, Yujie
Sun, Kuan
Du, Juan
author_facet Yue, Xingyu
Wang, Chunwei
Zhang, Bo
Zhang, Zeyu
Xiong, Zhuang
Zu, Xinzhi
Liu, Zhengzheng
Hu, Zhiping
Odunmbaku, George Omololu
Zheng, Yujie
Sun, Kuan
Du, Juan
author_sort Yue, Xingyu
collection PubMed
description The formation of polaron, i.e., the strong coupling process between the carrier and lattice, is considered to play a crucial role in benefiting the photoelectric performance of hybrid organic-inorganic halide perovskites. However, direct observation of the dynamical formation of polarons occurring at time scales within hundreds of femtoseconds remains a technical challenge. Here, by terahertz emission spectroscopy, we demonstrate the real-time observation of polaron formation process in FAPbI(3) films. Two different polaron resonances interpreted with the anharmonic coupling emission model have been studied: P1 at ~1 THz relates to the inorganic sublattice vibration mode and the P2 at ~0.4 THz peak relates to the FA(+) cation rotation mode. Moreover, P2 could be further strengthened than P1 by pumping the hot carriers to the higher sub-conduction band. Our observations could open a door for THz emission spectroscopy to be a powerful tool in studying polaron formation dynamics in perovskites.
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spelling pubmed-99381102023-02-19 Real-time observation of the buildup of polaron in α-FAPbI(3) Yue, Xingyu Wang, Chunwei Zhang, Bo Zhang, Zeyu Xiong, Zhuang Zu, Xinzhi Liu, Zhengzheng Hu, Zhiping Odunmbaku, George Omololu Zheng, Yujie Sun, Kuan Du, Juan Nat Commun Article The formation of polaron, i.e., the strong coupling process between the carrier and lattice, is considered to play a crucial role in benefiting the photoelectric performance of hybrid organic-inorganic halide perovskites. However, direct observation of the dynamical formation of polarons occurring at time scales within hundreds of femtoseconds remains a technical challenge. Here, by terahertz emission spectroscopy, we demonstrate the real-time observation of polaron formation process in FAPbI(3) films. Two different polaron resonances interpreted with the anharmonic coupling emission model have been studied: P1 at ~1 THz relates to the inorganic sublattice vibration mode and the P2 at ~0.4 THz peak relates to the FA(+) cation rotation mode. Moreover, P2 could be further strengthened than P1 by pumping the hot carriers to the higher sub-conduction band. Our observations could open a door for THz emission spectroscopy to be a powerful tool in studying polaron formation dynamics in perovskites. Nature Publishing Group UK 2023-02-17 /pmc/articles/PMC9938110/ /pubmed/36801865 http://dx.doi.org/10.1038/s41467-023-36652-4 Text en © The Author(s) 2023 https://creativecommons.org/licenses/by/4.0/Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/ (https://creativecommons.org/licenses/by/4.0/) .
spellingShingle Article
Yue, Xingyu
Wang, Chunwei
Zhang, Bo
Zhang, Zeyu
Xiong, Zhuang
Zu, Xinzhi
Liu, Zhengzheng
Hu, Zhiping
Odunmbaku, George Omololu
Zheng, Yujie
Sun, Kuan
Du, Juan
Real-time observation of the buildup of polaron in α-FAPbI(3)
title Real-time observation of the buildup of polaron in α-FAPbI(3)
title_full Real-time observation of the buildup of polaron in α-FAPbI(3)
title_fullStr Real-time observation of the buildup of polaron in α-FAPbI(3)
title_full_unstemmed Real-time observation of the buildup of polaron in α-FAPbI(3)
title_short Real-time observation of the buildup of polaron in α-FAPbI(3)
title_sort real-time observation of the buildup of polaron in α-fapbi(3)
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9938110/
https://www.ncbi.nlm.nih.gov/pubmed/36801865
http://dx.doi.org/10.1038/s41467-023-36652-4
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