Ultrafast correlated charge and lattice motion in a hybrid metal halide perovskite

Yang Lan, Benjamin J. Dringoli, David A. Valverde-Chávez, Carlito S. Ponseca, Mark Sutton, Yihui He, Mercouri G. Kanatzidis, David G. Cooke*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

57 Scopus citations


Hybrid organic-inorganic halide perovskites have shown remarkable optoelectronic properties, exhibiting an impressive tolerance to defects believed to originate from correlated motion of charge carriers and the polar lattice forming large polarons. Few experimental techniques are capable of directly probing these correlations, requiring simultaneous sub–millielectron volt energy and femtosecond temporal resolution after absorption of a photon. Here, we use time-resolved multi-THz spectroscopy, sensitive to the internal excitations of the polaron, to temporally and energetically resolve the coherent coupling of charges to longitudinal optical phonons in single-crystal CH3NH3PbI3 (MAPI). We observe room temperature intraband quantum beats arising from the coherent displacement of charge from the coupled phonon cloud. Our measurements provide strong evidence for the existence of polarons in MAPI at room temperature, suggesting that electron/hole-phonon coupling is a defining aspect of the hybrid metal-halide perovskites contributing to the protection from scattering and enhanced carrier lifetimes that define their usefulness in devices.

Original languageEnglish (US)
Article numbereaaw5558
JournalScience Advances
Issue number5
StatePublished - May 31 2019

ASJC Scopus subject areas

  • General


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