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Title: Observation of biexciton emission from single semiconductor nanoplatelets

Abstract

Quasi-two-dimensional semiconductor nanoplatelets (NPLs) are intriguing systems for studying the influence of Auger recombination processes on the multiexciton emission efficiencies in the weak in-plane confinement regime. We investigate CdSe/CdS core/shell NPLs using cryogenic temperature single particle spectroscopy and observe bright biexciton emission at high excitation powers. The average binding energy of the biexcitons is determined to be 16.5 meV. The observed switching between the biexciton and trion states indicates charging-decharging dynamics of the NPLs mediated by the Auger ionization process. These findings are highly relevant for harvesting efficient biexciton emission for energy, lighting, and quantum applications.

Authors:
 [1];  [2];  [1];  [3]; ORCiD logo [4]
+ Show Author Affiliations
  1. Argonne National Lab. (ANL), Argonne, IL (United States)
  2. Univ. of Chicago, IL (United States)
  3. Argonne National Lab. (ANL), Argonne, IL (United States); Univ. of Chicago, IL (United States)
  4. Argonne National Lab. (ANL), Argonne, IL (United States); Univ. of Chicago, IL (United States); Northwestern Argonne Institute of Science and Engineering, Evanston, IL (United States)
Publication Date:
Research Org.:
Argonne National Lab. (ANL), Argonne, IL (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES). Scientific User Facilities Division; National Science Foundation (NSF); Air Force Research Laboratory (AFRL), Air Force Office of Scientific Research (AFOSR)
OSTI Identifier:
1798303
Grant/Contract Number:  
AC02-06CH11357
Resource Type:
Accepted Manuscript
Journal Name:
Physical Review Materials
Additional Journal Information:
Journal Volume: 5; Journal Issue: 5; Journal ID: ISSN 2475-9953
Publisher:
American Physical Society (APS)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; Biexcitons; Electronic structure; ExcitonsTrions; II-VI semiconductors; Quantum dots; Confocal imaging; Fluorescence spectroscopy; Liquid helium cooling; Photon counting

Citation Formats

Peng, Lintao, Cho, Wooje, Zhang, Xufeng, Talapin, Dmitri, and Ma, Xuedan xuedan.ma@anl.gov. Observation of biexciton emission from single semiconductor nanoplatelets. United States: N. p., 2021. Web. doi:10.1103/physrevmaterials.5.l051601.
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Peng, Lintao, Cho, Wooje, Zhang, Xufeng, Talapin, Dmitri, & Ma, Xuedan xuedan.ma@anl.gov. Observation of biexciton emission from single semiconductor nanoplatelets. United States. https://doi.org/10.1103/physrevmaterials.5.l051601
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Peng, Lintao, Cho, Wooje, Zhang, Xufeng, Talapin, Dmitri, and Ma, Xuedan xuedan.ma@anl.gov. Tue . "Observation of biexciton emission from single semiconductor nanoplatelets". United States. https://doi.org/10.1103/physrevmaterials.5.l051601. https://www.osti.gov/servlets/purl/1798303.
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@article{osti_1798303,
title = {Observation of biexciton emission from single semiconductor nanoplatelets},
author = {Peng, Lintao and Cho, Wooje and Zhang, Xufeng and Talapin, Dmitri and Ma, Xuedan xuedan.ma@anl.gov},
abstractNote = {Quasi-two-dimensional semiconductor nanoplatelets (NPLs) are intriguing systems for studying the influence of Auger recombination processes on the multiexciton emission efficiencies in the weak in-plane confinement regime. We investigate CdSe/CdS core/shell NPLs using cryogenic temperature single particle spectroscopy and observe bright biexciton emission at high excitation powers. The average binding energy of the biexcitons is determined to be 16.5 meV. The observed switching between the biexciton and trion states indicates charging-decharging dynamics of the NPLs mediated by the Auger ionization process. These findings are highly relevant for harvesting efficient biexciton emission for energy, lighting, and quantum applications.},
doi = {10.1103/physrevmaterials.5.l051601},
journal = {Physical Review Materials},
number = 5,
volume = 5,
place = {United States},
year = {Tue May 04 00:00:00 EDT 2021},
month = {Tue May 04 00:00:00 EDT 2021}
}
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Publisher's Version of Record
https://doi.org/10.1103/physrevmaterials.5.l051601
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