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Lack of Photon Antibunching Supports Supertrap Model of Photoluminescence Blinking in Perovskite Sub-Micrometer Crystals

Eremchev, Ivan Yu ; Tarasevich, Aleksandr O. ; Li, Jun LU orcid ; Naumov, Andrey V. and Scheblykin, Ivan G. LU orcid (2021) In Advanced Optical Materials 9(3).
Abstract

Antibunching effect is typically observed in individual systems possessing photoluminescence (PL) blinking and vice versa. Contrary to this common perception, absence of antibunching in strongly blinking methyl ammonium led tri-iodide (MAPbI3) perovskite crystals of sizes from tens to hundreds of nanometers regardless of the excitation power density is observed. Antibunching effect does not appear even when photon statistics are analyzed for bright and intermediate PL intensity levels independently. This shows that there is no directional energy funneling and accumulation of charge carriers in the small local regions in MAPbI3 crystals where an Auger recombination can potentially suppress the simultaneous emission... (More)

Antibunching effect is typically observed in individual systems possessing photoluminescence (PL) blinking and vice versa. Contrary to this common perception, absence of antibunching in strongly blinking methyl ammonium led tri-iodide (MAPbI3) perovskite crystals of sizes from tens to hundreds of nanometers regardless of the excitation power density is observed. Antibunching effect does not appear even when photon statistics are analyzed for bright and intermediate PL intensity levels independently. This shows that there is no directional energy funneling and accumulation of charge carriers in the small local regions in MAPbI3 crystals where an Auger recombination can potentially suppress the simultaneous emission of two photons. This result allows for the exclusion of the PL blinking mechanism based on the idea of emitting sites previously hypothesized for perovskites. Therefore, the model of PL blinking in perovskite crystals based on the presence of a metastable non-radiative recombination center (the supertrap) is the only one proposed so far which explains blinking without conflicting with the absence of photon correlations.

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author
; ; ; and
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
antibunching, Auger recombination, charge trapping, luminescence blinking, metal halide perovskites, semiconductors
in
Advanced Optical Materials
volume
9
issue
3
article number
2001596
publisher
John Wiley & Sons Inc.
external identifiers
  • scopus:85097012618
ISSN
2195-1071
DOI
10.1002/adom.202001596
language
English
LU publication?
yes
id
93c6fd53-2fc4-4f0d-b43a-55a815f5584b
date added to LUP
2020-12-14 09:18:50
date last changed
2023-11-20 17:16:48
@article{93c6fd53-2fc4-4f0d-b43a-55a815f5584b,
  abstract     = {{<p>Antibunching effect is typically observed in individual systems possessing photoluminescence (PL) blinking and vice versa. Contrary to this common perception, absence of antibunching in strongly blinking methyl ammonium led tri-iodide (MAPbI<sub>3</sub>) perovskite crystals of sizes from tens to hundreds of nanometers regardless of the excitation power density is observed. Antibunching effect does not appear even when photon statistics are analyzed for bright and intermediate PL intensity levels independently. This shows that there is no directional energy funneling and accumulation of charge carriers in the small local regions in MAPbI<sub>3</sub> crystals where an Auger recombination can potentially suppress the simultaneous emission of two photons. This result allows for the exclusion of the PL blinking mechanism based on the idea of emitting sites previously hypothesized for perovskites. Therefore, the model of PL blinking in perovskite crystals based on the presence of a metastable non-radiative recombination center (the supertrap) is the only one proposed so far which explains blinking without conflicting with the absence of photon correlations.</p>}},
  author       = {{Eremchev, Ivan Yu and Tarasevich, Aleksandr O. and Li, Jun and Naumov, Andrey V. and Scheblykin, Ivan G.}},
  issn         = {{2195-1071}},
  keywords     = {{antibunching; Auger recombination; charge trapping; luminescence blinking; metal halide perovskites; semiconductors}},
  language     = {{eng}},
  number       = {{3}},
  publisher    = {{John Wiley & Sons Inc.}},
  series       = {{Advanced Optical Materials}},
  title        = {{Lack of Photon Antibunching Supports Supertrap Model of Photoluminescence Blinking in Perovskite Sub-Micrometer Crystals}},
  url          = {{http://dx.doi.org/10.1002/adom.202001596}},
  doi          = {{10.1002/adom.202001596}},
  volume       = {{9}},
  year         = {{2021}},
}