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High-Quality Solution-Processed Quasi-2D Perovskite for Low-Threshold Lasers

Zhao, Kefan ; Wang, Yujing ; Lin, Kai ; Ji, Ting ; Shi, Linlin ; Zheng, Kaibo LU ; Cui, Yanxia and Li, Guohui (2024) In ACS Applied Materials and Interfaces
Abstract

Spin-coated quasi-two-dimensional halide perovskite films, which exhibit superior optoelectronic properties and environmental stability, have recently been extensively studied for lasers. Crystallinity is of great importance for the laser performance. Although some parameters related to the spin-coating process have been studied, the in-depth understanding and effective control of the acceleration rate on two-dimensional perovskite crystallization during spin-coating are still unknown. Here we investigate the effect of solvent evaporation on the microstructure of the final perovskite films during the spin-coating process. The crystallization quality of the film can be significantly improved by controlling solvent evaporation. As a... (More)

Spin-coated quasi-two-dimensional halide perovskite films, which exhibit superior optoelectronic properties and environmental stability, have recently been extensively studied for lasers. Crystallinity is of great importance for the laser performance. Although some parameters related to the spin-coating process have been studied, the in-depth understanding and effective control of the acceleration rate on two-dimensional perovskite crystallization during spin-coating are still unknown. Here we investigate the effect of solvent evaporation on the microstructure of the final perovskite films during the spin-coating process. The crystallization quality of the film can be significantly improved by controlling solvent evaporation. As a result, the prepared quasi-2D perovskite film exhibits a stimulated emission threshold (pump: 343 nm, 6 kHz, 290 fs) of 550 nm as low as 16.2 μJ/cm2. Transient absorption characterization shows that the radiative biexciton recombination time is reduced from 738.5 to 438.3 ps, benefiting from the improved crystallinity. The faster biexciton recombination significantly enhanced the photoluminescence efficiency, which is critical for population inversion. This work could contribute to the development of low-threshold lasers.

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author
; ; ; ; ; ; and
organization
publishing date
type
Contribution to journal
publication status
in press
subject
keywords
amplified spontaneous emission, biexciton, high crystalline quality, low threshold, perovskite
in
ACS Applied Materials and Interfaces
publisher
The American Chemical Society (ACS)
external identifiers
  • scopus:85190721247
  • pmid:38628106
ISSN
1944-8244
DOI
10.1021/acsami.4c00308
language
English
LU publication?
yes
id
f679c435-ca87-4210-aebb-c17a7aa45f79
date added to LUP
2024-05-03 09:36:29
date last changed
2024-05-17 12:02:20
@article{f679c435-ca87-4210-aebb-c17a7aa45f79,
  abstract     = {{<p>Spin-coated quasi-two-dimensional halide perovskite films, which exhibit superior optoelectronic properties and environmental stability, have recently been extensively studied for lasers. Crystallinity is of great importance for the laser performance. Although some parameters related to the spin-coating process have been studied, the in-depth understanding and effective control of the acceleration rate on two-dimensional perovskite crystallization during spin-coating are still unknown. Here we investigate the effect of solvent evaporation on the microstructure of the final perovskite films during the spin-coating process. The crystallization quality of the film can be significantly improved by controlling solvent evaporation. As a result, the prepared quasi-2D perovskite film exhibits a stimulated emission threshold (pump: 343 nm, 6 kHz, 290 fs) of 550 nm as low as 16.2 μJ/cm<sup>2</sup>. Transient absorption characterization shows that the radiative biexciton recombination time is reduced from 738.5 to 438.3 ps, benefiting from the improved crystallinity. The faster biexciton recombination significantly enhanced the photoluminescence efficiency, which is critical for population inversion. This work could contribute to the development of low-threshold lasers.</p>}},
  author       = {{Zhao, Kefan and Wang, Yujing and Lin, Kai and Ji, Ting and Shi, Linlin and Zheng, Kaibo and Cui, Yanxia and Li, Guohui}},
  issn         = {{1944-8244}},
  keywords     = {{amplified spontaneous emission; biexciton; high crystalline quality; low threshold; perovskite}},
  language     = {{eng}},
  publisher    = {{The American Chemical Society (ACS)}},
  series       = {{ACS Applied Materials and Interfaces}},
  title        = {{High-Quality Solution-Processed Quasi-2D Perovskite for Low-Threshold Lasers}},
  url          = {{http://dx.doi.org/10.1021/acsami.4c00308}},
  doi          = {{10.1021/acsami.4c00308}},
  year         = {{2024}},
}