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Effect of synthesis methods on photoluminescent properties for CsPbBr3 nanocrystals : Hot injection method and conversion method

Zhang, Fengying LU ; Chen, Junsheng LU ; Zhou, Ying ; He, Rongxing and Zheng, Kaibo LU (2020) In Journal of Luminescence 220.
Abstract

Multiple facile synthetic strategies for all inorganic perovskite CsPbBr3 nanocrystals (NCs) have been established and developed, profiting from their excellent performance and great potential applied in the field of photonic and optoelectronic. Here, CsPbBr3 NCs were synthesized by both hot injection method (method 1) and conversion method (method 2), and the discrepancy of their photophysical properties is elucidated via the complementary studies between time-resolved photoluminescence (TRPL) and transient-absorption (TA) spectroscopy. We found that CsPbBr3 NCs prepared by conversion method exhibited lower PL quantum yield (QY), which was ascribed to the larger partition of the NCs being passivated... (More)

Multiple facile synthetic strategies for all inorganic perovskite CsPbBr3 nanocrystals (NCs) have been established and developed, profiting from their excellent performance and great potential applied in the field of photonic and optoelectronic. Here, CsPbBr3 NCs were synthesized by both hot injection method (method 1) and conversion method (method 2), and the discrepancy of their photophysical properties is elucidated via the complementary studies between time-resolved photoluminescence (TRPL) and transient-absorption (TA) spectroscopy. We found that CsPbBr3 NCs prepared by conversion method exhibited lower PL quantum yield (QY), which was ascribed to the larger partition of the NCs being passivated from the quenchers from the deep trap states. On the other hand, we also observed different radiative recombination rates between two samples which should be due to various trapping/detrapping times prior to the radiative recombination of the charge carriers in two samples. These results provide better guidance for the development and improvement of synthesis methodology for perovskite NCs.

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; ; ; and
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Perovskite nanoparticles, Radiative recombination, Synthetic strategy, Trap states
in
Journal of Luminescence
volume
220
article number
117023
publisher
Elsevier
external identifiers
  • scopus:85077374159
ISSN
0022-2313
DOI
10.1016/j.jlumin.2019.117023
language
English
LU publication?
yes
id
f00a18c0-34fb-4d54-b8ea-106d67d5b815
date added to LUP
2020-01-22 16:29:25
date last changed
2023-11-19 22:21:52
@article{f00a18c0-34fb-4d54-b8ea-106d67d5b815,
  abstract     = {{<p>Multiple facile synthetic strategies for all inorganic perovskite CsPbBr<sub>3</sub> nanocrystals (NCs) have been established and developed, profiting from their excellent performance and great potential applied in the field of photonic and optoelectronic. Here, CsPbBr<sub>3</sub> NCs were synthesized by both hot injection method (method 1) and conversion method (method 2), and the discrepancy of their photophysical properties is elucidated via the complementary studies between time-resolved photoluminescence (TRPL) and transient-absorption (TA) spectroscopy. We found that CsPbBr<sub>3</sub> NCs prepared by conversion method exhibited lower PL quantum yield (QY), which was ascribed to the larger partition of the NCs being passivated from the quenchers from the deep trap states. On the other hand, we also observed different radiative recombination rates between two samples which should be due to various trapping/detrapping times prior to the radiative recombination of the charge carriers in two samples. These results provide better guidance for the development and improvement of synthesis methodology for perovskite NCs.</p>}},
  author       = {{Zhang, Fengying and Chen, Junsheng and Zhou, Ying and He, Rongxing and Zheng, Kaibo}},
  issn         = {{0022-2313}},
  keywords     = {{Perovskite nanoparticles; Radiative recombination; Synthetic strategy; Trap states}},
  language     = {{eng}},
  publisher    = {{Elsevier}},
  series       = {{Journal of Luminescence}},
  title        = {{Effect of synthesis methods on photoluminescent properties for CsPbBr<sub>3</sub> nanocrystals : Hot injection method and conversion method}},
  url          = {{http://dx.doi.org/10.1016/j.jlumin.2019.117023}},
  doi          = {{10.1016/j.jlumin.2019.117023}},
  volume       = {{220}},
  year         = {{2020}},
}