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Nature of Self-Trapped Exciton Emission in Zero-Dimensional Cs2ZrCl6 Perovskite Nanocrystals

He, Yanmei LU ; Liu, Siping ; Yao, Zehan LU ; Zhao, Qian ; Chabera, Pavel LU ; Zheng, Kaibo LU ; Yang, Bin ; Pullerits, Tönu LU and Chen, Junsheng LU (2023) In The Journal of Physical Chemistry Letters 14(34). p.7665-7671
Abstract
Low dimensional perovskite-inspired materials with self-tapped exciton (STE) emission have stimulated a surge of cutting-edge research in optoelectronics. Despite numerous efforts on developing versatile low-dimensional perovskite-inspired materials with efficient STE emissions, there is little emphasis on the intrinsic dynamics of STE-based broad emission in these materials. Here, we investigated the excited state dynamics in zero-dimensional (0D) Cs2ZrCl6 nanocrystals (NCs) with efficient blue STE emission. By using femtosecond transient absorption (fs-TA) spectroscopy, the ultrafast STE formation process within 400 fs is directly observed. Then, the formed STEs relax to an intermediate STE state with a lifetime of ∼180 ps before... (More)
Low dimensional perovskite-inspired materials with self-tapped exciton (STE) emission have stimulated a surge of cutting-edge research in optoelectronics. Despite numerous efforts on developing versatile low-dimensional perovskite-inspired materials with efficient STE emissions, there is little emphasis on the intrinsic dynamics of STE-based broad emission in these materials. Here, we investigated the excited state dynamics in zero-dimensional (0D) Cs2ZrCl6 nanocrystals (NCs) with efficient blue STE emission. By using femtosecond transient absorption (fs-TA) spectroscopy, the ultrafast STE formation process within 400 fs is directly observed. Then, the formed STEs relax to an intermediate STE state with a lifetime of ∼180 ps before reaching the emissive STE state with a lifetime of ∼15 μs. Our work offers a comprehensive and precise dynamic picture of STE emission in low-dimensional metal halides and sheds light on extending their potential applications. (Less)
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organization
publishing date
type
Contribution to journal
publication status
published
subject
in
The Journal of Physical Chemistry Letters
volume
14
issue
34
pages
7 pages
publisher
The American Chemical Society (ACS)
external identifiers
  • scopus:85169294403
  • pmid:37603899
ISSN
1948-7185
DOI
10.1021/acs.jpclett.3c01878
language
English
LU publication?
yes
id
9f0defb4-5830-4f53-b7dd-cf4ba28cd77d
date added to LUP
2023-09-13 17:12:34
date last changed
2023-12-14 03:00:41
@article{9f0defb4-5830-4f53-b7dd-cf4ba28cd77d,
  abstract     = {{Low dimensional perovskite-inspired materials with self-tapped exciton (STE) emission have stimulated a surge of cutting-edge research in optoelectronics. Despite numerous efforts on developing versatile low-dimensional perovskite-inspired materials with efficient STE emissions, there is little emphasis on the intrinsic dynamics of STE-based broad emission in these materials. Here, we investigated the excited state dynamics in zero-dimensional (0D) Cs2ZrCl6 nanocrystals (NCs) with efficient blue STE emission. By using femtosecond transient absorption (fs-TA) spectroscopy, the ultrafast STE formation process within 400 fs is directly observed. Then, the formed STEs relax to an intermediate STE state with a lifetime of ∼180 ps before reaching the emissive STE state with a lifetime of ∼15 μs. Our work offers a comprehensive and precise dynamic picture of STE emission in low-dimensional metal halides and sheds light on extending their potential applications.}},
  author       = {{He, Yanmei and Liu, Siping and Yao, Zehan and Zhao, Qian and Chabera, Pavel and Zheng, Kaibo and Yang, Bin and Pullerits, Tönu and Chen, Junsheng}},
  issn         = {{1948-7185}},
  language     = {{eng}},
  month        = {{08}},
  number       = {{34}},
  pages        = {{7665--7671}},
  publisher    = {{The American Chemical Society (ACS)}},
  series       = {{The Journal of Physical Chemistry Letters}},
  title        = {{Nature of Self-Trapped Exciton Emission in Zero-Dimensional Cs2ZrCl6 Perovskite Nanocrystals}},
  url          = {{http://dx.doi.org/10.1021/acs.jpclett.3c01878}},
  doi          = {{10.1021/acs.jpclett.3c01878}},
  volume       = {{14}},
  year         = {{2023}},
}