Dynamic THz signatures of charge-lattice correlations

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

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

The hybrid metal halide perovskites have shown enormous promise for optoelectronic devices, including efficient photovoltaics, however their insensitivity to defects has remained puzzling. Polaron correlations have been cited as a possible means to protect charge carriers from defect scattering. In this paper, we show time-resolved THz spectroscopy measurements are capable of directly probing polaron correlations via an intra-band coherent beat arising from center-of-mass quasi-particle motion and the internal motion of charge within its self-induced potential. We describe these measurements indicating that charge carriers do indeed exist as polarons, which are coherent for several hundred femtoseconds following photon absorption.

Original languageEnglish
Title of host publication2020 45th International Conference on Infrared, Millimeter, and Terahertz Waves, IRMMW-THz 2020
PublisherIEEE Computer Society
Pages293-294
Number of pages2
ISBN (Electronic)9781728166209
DOIs
Publication statusPublished - Nov 8 2020
Event45th International Conference on Infrared, Millimeter, and Terahertz Waves, IRMMW-THz 2020 - Virtual, Buffalo, United States
Duration: Nov 8 2020Nov 13 2020

Publication series

NameInternational Conference on Infrared, Millimeter, and Terahertz Waves, IRMMW-THz
Volume2020-November
ISSN (Print)2162-2027
ISSN (Electronic)2162-2035

Conference

Conference45th International Conference on Infrared, Millimeter, and Terahertz Waves, IRMMW-THz 2020
CountryUnited States
CityVirtual, Buffalo
Period11/8/2011/13/20

ASJC Scopus subject areas

  • Energy Engineering and Power Technology
  • Electrical and Electronic Engineering

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