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Free Carrier, Exciton, and Phonon Dynamics in Lead‐Halide Perovskites Studied with Ultrafast Terahertz Spectroscopy
Author(s) -
Zhao Daming,
Chia Elbert E. M.
Publication year - 2020
Publication title -
advanced optical materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.89
H-Index - 91
ISSN - 2195-1071
DOI - 10.1002/adom.201900783
Subject(s) - terahertz radiation , terahertz spectroscopy and technology , materials science , spectroscopy , phonon , exciton , optoelectronics , charge carrier , perovskite (structure) , ultrashort pulse , photonics , terahertz time domain spectroscopy , halide , laser , optics , physics , condensed matter physics , chemistry , inorganic chemistry , quantum mechanics , crystallography
Terahertz time‐domain spectroscopy is a noncontact, coherent technique that can probe dynamics of carriers, phonons and excitons, and the interplay among these degrees of freedom, which determines the functionalities of the system. In the past few years, lead‐halide perovskites have shown to be a promising class of materials in the areas of solar cells, light emitting diodes, lasers, photodetectors, and field‐effect transistors. In these electronic and photonic devices, the knowledge of the dynamics of charge carriers and other low‐energy excitations is crucial to understand the underlying physics that ultimately determines the device performances. Here, some of the most representative works in the area of halide perovskite research using terahertz time‐domain spectroscopy and time‐resolved terahertz spectroscopy are reviewed, highlighting the power of ultrafast terahertz techniques on this class of material system.