Real-time observation of the buildup of polaron in α-FAPbI3

Xingyu Yue, Chunwei Wang, Bo Zhang, Zeyu Zhang (), Zhuang Xiong, Xinzhi Zu, Zhengzheng Liu, Zhiping Hu, George Omololu Odunmbaku, Yujie Zheng, Kuan Sun () and Juan Du ()
Additional contact information
Xingyu Yue: Chinese Academy of Sciences (CAS)
Chunwei Wang: Chinese Academy of Sciences (CAS)
Bo Zhang: Chongqing University
Zeyu Zhang: Chinese Academy of Sciences (CAS)
Zhuang Xiong: Chongqing University
Xinzhi Zu: Chinese Academy of Sciences (CAS)
Zhengzheng Liu: Chinese Academy of Sciences (CAS)
Zhiping Hu: University of Chinese Academy of Sciences
George Omololu Odunmbaku: Chongqing University
Yujie Zheng: Chongqing University
Kuan Sun: Chongqing University
Juan Du: Chinese Academy of Sciences (CAS)

Nature Communications, 2023, vol. 14, issue 1, 1-6

Abstract: Abstract 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 FAPbI3 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.

Date: 2023
References: View references in EconPapers View complete reference list from CitEc
Citations:

Downloads: (external link)
https://www.nature.com/articles/s41467-023-36652-4 Abstract (text/html)

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:nat:natcom:v:14:y:2023:i:1:d:10.1038_s41467-023-36652-4

Ordering information: This journal article can be ordered from
https://www.nature.com/ncomms/

DOI: 10.1038/s41467-023-36652-4

Access Statistics for this article

Nature Communications is currently edited by Nathalie Le Bot, Enda Bergin and Fiona Gillespie

More articles in Nature Communications from Nature
Bibliographic data for series maintained by Sonal Shukla () and Springer Nature Abstracting and Indexing ().