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

Yanmei He; Siping Liu; Zehan Yao; Qian Zhao; Pavel Chabera; Kaibo Zheng; Bin Yang; Tönu Pullerits; Junsheng Chen

doi:10.1021/acs.jpclett.3c01878

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

Yanmei He, Siping Liu, Zehan Yao, Qian Zhao, Pavel Chabera, Kaibo Zheng, Bin Yang, Tönu Pullerits, Junsheng Chen

Research output: Contribution to journal › Article › peer-review

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.

Original language	English
Pages (from-to)	7665-7671
Number of pages	7
Journal	The Journal of Physical Chemistry Letters
Volume	14
Issue number	34
DOIs	https://doi.org/10.1021/acs.jpclett.3c01878
Publication status	Published - 2023 Aug 8

Subject classification (UKÄ)

Atom and Molecular Physics and Optics
Condensed Matter Physics (including Material Physics, Nano Physics)
Physical Chemistry (including Surface- and Colloid Chemistry)

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10.1021/acs.jpclett.3c01878Licence: CC BY

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title = "Nature of Self-Trapped Exciton Emission in Zero-Dimensional Cs2ZrCl6 Perovskite Nanocrystals",

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 = "Yanmei He and Siping Liu and Zehan Yao and Qian Zhao and Pavel Chabera and Kaibo Zheng and Bin Yang and T{\"o}nu Pullerits and Junsheng Chen",

year = "2023",

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doi = "10.1021/acs.jpclett.3c01878",

language = "English",

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journal = "The Journal of Physical Chemistry Letters",

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publisher = "The American Chemical Society (ACS)",

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T1 - Nature of Self-Trapped Exciton Emission in Zero-Dimensional Cs2ZrCl6 Perovskite Nanocrystals

AU - He, Yanmei

AU - Liu, Siping

AU - Yao, Zehan

AU - Zhao, Qian

AU - Chabera, Pavel

AU - Zheng, Kaibo

AU - Yang, Bin

AU - Pullerits, Tönu

AU - Chen, Junsheng

PY - 2023/8/8

Y1 - 2023/8/8

N2 - 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.

AB - 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.

UR - https://www.scopus.com/pages/publications/85169294403

U2 - 10.1021/acs.jpclett.3c01878

DO - 10.1021/acs.jpclett.3c01878

M3 - Article

C2 - 37603899

SN - 1948-7185

VL - 14

SP - 7665

EP - 7671

JO - The Journal of Physical Chemistry Letters

JF - The Journal of Physical Chemistry Letters

IS - 34

ER -

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

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Exploring Structural Dynamics and Photophysics in Metal Halide Perovskites and Related Materials

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