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Temperature-Dependent Intensity Modulated Two-Photon Excited Fluorescence Microscopy for High Resolution Mapping of Charge Carrier Dynamics

Shi, Qi LU ; Kumar, Pushpendra LU and Pullerits, Tönu LU (2023) In ACS Physical Chemistry Au 3(5). p.467-476
Abstract

We present a temperature-dependent intensity modulated two-photon excited fluorescence microscopy technique that enables high-resolution quantitative mapping of charge carrier dynamics in perovskite microcrystal film. By disentangling the emission into harmonics of the excitation modulation frequency, we analyze the first and second order charge carrier recombination processes, including potential accumulation effects. Our approach allows for a quantitative comparison of different emission channels at a micrometer resolution. To demonstrate the effectiveness of the method, we applied it to a methylammonium lead bromide perovskite microcrystal film. We investigated the temperature-dependent modulated imaging, encompassing the exciton... (More)

We present a temperature-dependent intensity modulated two-photon excited fluorescence microscopy technique that enables high-resolution quantitative mapping of charge carrier dynamics in perovskite microcrystal film. By disentangling the emission into harmonics of the excitation modulation frequency, we analyze the first and second order charge carrier recombination processes, including potential accumulation effects. Our approach allows for a quantitative comparison of different emission channels at a micrometer resolution. To demonstrate the effectiveness of the method, we applied it to a methylammonium lead bromide perovskite microcrystal film. We investigated the temperature-dependent modulated imaging, encompassing the exciton dissociation-association and charge carrier trapping-detrapping equilibrium. Additionally, we explored the potential freezing out of traps and the phase transition occurring at low temperatures.

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author
; and
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
first-order recombination, intensity modulation technique, MAPbBr perovskite, phase transition, second-order recombination
in
ACS Physical Chemistry Au
volume
3
issue
5
pages
10 pages
publisher
The American Chemical Society (ACS)
external identifiers
  • pmid:37780538
  • scopus:85165908914
ISSN
2694-2445
DOI
10.1021/acsphyschemau.3c00013
language
English
LU publication?
yes
additional info
Publisher Copyright: © 2023 The Authors. Published by American Chemical Society.
id
c3b26562-68d3-4130-a2e3-3fbb75e9d15c
date added to LUP
2024-01-15 15:21:40
date last changed
2024-04-16 01:48:07
@article{c3b26562-68d3-4130-a2e3-3fbb75e9d15c,
  abstract     = {{<p>We present a temperature-dependent intensity modulated two-photon excited fluorescence microscopy technique that enables high-resolution quantitative mapping of charge carrier dynamics in perovskite microcrystal film. By disentangling the emission into harmonics of the excitation modulation frequency, we analyze the first and second order charge carrier recombination processes, including potential accumulation effects. Our approach allows for a quantitative comparison of different emission channels at a micrometer resolution. To demonstrate the effectiveness of the method, we applied it to a methylammonium lead bromide perovskite microcrystal film. We investigated the temperature-dependent modulated imaging, encompassing the exciton dissociation-association and charge carrier trapping-detrapping equilibrium. Additionally, we explored the potential freezing out of traps and the phase transition occurring at low temperatures.</p>}},
  author       = {{Shi, Qi and Kumar, Pushpendra and Pullerits, Tönu}},
  issn         = {{2694-2445}},
  keywords     = {{first-order recombination; intensity modulation technique; MAPbBr perovskite; phase transition; second-order recombination}},
  language     = {{eng}},
  month        = {{09}},
  number       = {{5}},
  pages        = {{467--476}},
  publisher    = {{The American Chemical Society (ACS)}},
  series       = {{ACS Physical Chemistry Au}},
  title        = {{Temperature-Dependent Intensity Modulated Two-Photon Excited Fluorescence Microscopy for High Resolution Mapping of Charge Carrier Dynamics}},
  url          = {{http://dx.doi.org/10.1021/acsphyschemau.3c00013}},
  doi          = {{10.1021/acsphyschemau.3c00013}},
  volume       = {{3}},
  year         = {{2023}},
}