Issue 44, 2022

Self-trapped excitons in soft semiconductors

Abstract

Self-trapped excitons (STEs) have attracted tremendous attention due to their intriguing properties and potential optoelectronic applications. STEs are formed from the lattice distortion induced by the strong electron (exciton)–phonon coupling in soft semiconductors upon photoexcitation, which features in broadband photoluminescence (PL) emission spectra with a large Stokes shift. Recently, significant progress has been achieved in this field but many remain challenges that need to be solved, including the understanding of the underlying physical mechanism, tuning of the performance, and device applications. Along these lines, for the first time, systematic experimental characterizations and advanced theoretical calculations are presented in this review to shed light on the physical mechanism. The possibility of tuning the STEs through multiple degrees of freedom is also presented, along with an overview of the STE-based emerged applications and future research perspectives.

Graphical abstract: Self-trapped excitons in soft semiconductors

Article information

Article type
Review Article
Submitted
18 jul 2022
Accepted
19 out 2022
First published
19 out 2022

Nanoscale, 2022,14, 16394-16414

Self-trapped excitons in soft semiconductors

J. Tan, D. Li, J. Zhu, N. Han, Y. Gong and Y. Zhang, Nanoscale, 2022, 14, 16394 DOI: 10.1039/D2NR03935D

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