Polarons in Halide Perovskites: A Perspective

Dibyajyoti Ghosh, Eric Welch, Amanda J. Neukirch, Alex Zakhidov, Sergei Tretiak

Research output: Contribution to journalArticlepeer-review

54 Citations (Scopus)

Abstract

Metal halide perovskites (MHPs) have rapidly emerged as leading contenders in photovoltaic technology and other optoelectronic applications owing to their outstanding optoelectronic properties. After a decade of intense research, an in-depth understanding of the charge carrier transport in MHPs is still an active topic of debate. In this Perspective, we discuss the current state of the field by summarizing the most extensively studied carrier transport mechanisms, such as electron-phonon scattering limited dynamics, ferroelectric effects, Rashba-type band splitting, and polaronic transport. We further extensively discuss the emerging experimental and computational evidence for dominant polaronic carrier dynamics in MHPs. Focusing on both small and large polarons, we explore the fundamental aspects of their motion through the lattice, protecting the photogenerated charge carriers from the recombination process. Finally, we outline different physical and chemical approaches considered recently to study and exploit the polaron transport in MHPs.

Original languageEnglish
Pages (from-to)3271-3286
Number of pages16
JournalJournal of Physical Chemistry Letters
Volume11
Issue number9
DOIs
Publication statusPublished - 7 May 2020
Externally publishedYes

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