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Quantized Exciton Motion and Fine Energy-Level Structure of a Single Perovskite Nanowire.

Authors :
Tang Y
Yin C
Jing Q
Zhang C
Yu ZG
Lu Z
Xiao M
Wang X
Source :
Nano letters [Nano Lett] 2022 Apr 13; Vol. 22 (7), pp. 2907-2914. Date of Electronic Publication: 2022 Apr 01.
Publication Year :
2022

Abstract

The quantum-confinement effect profoundly influences the exciton energy-level structures and recombination dynamics of semiconductor nanostructures but remains largely unexplored in traditional one-dimensional nanowires mainly due to their poor optical qualities. Here, we show that in defect-tolerant perovskite material of highly luminescent CsPbBr <subscript>3</subscript> nanowires, the exciton's center-of-mass motion perpendicular to the axial direction is severely confined. This is reflected in the two sets of photoluminescence spectra emitted from a single CsPbBr <subscript>3</subscript> nanowire, each of which consists of doublet peaks with linear polarizations perpendicular and parallel to the axial direction. Moreover, different exciton states can be mixed by the Rashba spin-orbit coupling effect, resulting in two single photoluminescence peaks with linear polarizations both along the nanowire axis. The above findings mark the emergence of an ideal platform for the exploration of intrinsic one-dimensional exciton photophysics and optoelectronics, thus bridging the long-missing research gap between the well-studied two- and zero-dimensional semiconductor nanostructures.

Details

Language :
English
ISSN :
1530-6992
Volume :
22
Issue :
7
Database :
MEDLINE
Journal :
Nano letters
Publication Type :
Academic Journal
Accession number :
35362973
Full Text :
https://doi.org/10.1021/acs.nanolett.2c00079