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Stable-wavelength perovskite nanoplatelet laser via mixed-phase engineering

Li, Guohui ; Ji, Yulong ; Zhao, Ruofan ; Xue, Lin ; Zhang, Ye ; Zheng, Kaibo LU and Cui, Yanxia (2025) In SCIENCE CHINA Materials 68(11). p.4025-4031
Abstract

Perovskites have attracted widespread attention for laser applications due to their excellent optoelectronic properties. However, perovskite lasers typically exhibit a wavelength shift as pump density increases. Here, we report a pump-induced wavelength shift-free laser achieved using a perovskite nanoplatelet with mixed orthorhombic and tetragonal phase. At 293 K, the tetragonal-phase perovskite nanoplatelet laser exhibits a blue shift of ~0.4 nm µJ−1 cm2 with increasing pump density. In contrast, at 80 K, the orthorhombic-phase perovskite nanoplatelet laser exhibits a red shift of ~1 nm µJ−1 cm2. By stabilizing the perovskite nanoplatelet in a mixed orthorhombic-tetragonal phase at 163 K,... (More)

Perovskites have attracted widespread attention for laser applications due to their excellent optoelectronic properties. However, perovskite lasers typically exhibit a wavelength shift as pump density increases. Here, we report a pump-induced wavelength shift-free laser achieved using a perovskite nanoplatelet with mixed orthorhombic and tetragonal phase. At 293 K, the tetragonal-phase perovskite nanoplatelet laser exhibits a blue shift of ~0.4 nm µJ−1 cm2 with increasing pump density. In contrast, at 80 K, the orthorhombic-phase perovskite nanoplatelet laser exhibits a red shift of ~1 nm µJ−1 cm2. By stabilizing the perovskite nanoplatelet in a mixed orthorhombic-tetragonal phase at 163 K, the pump induced wavelength shifts are completely suppressed, resulting in a wavelength-stable laser. Additionally, the lasing threshold decreases from 18.4 µJ cm−2 at room temperature to 4.5 µJ cm−2 at 163 K. This study presents a promising strategy for achieving pump-insensitive wavelength stability in micro/nano lasers.

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author
; ; ; ; ; and
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
laser, mixed phase, perovskite nanoplatelet, stable-wavelength
in
SCIENCE CHINA Materials
volume
68
issue
11
pages
7 pages
publisher
Science China Press
external identifiers
  • scopus:105016881299
ISSN
2095-8226
DOI
10.1007/s40843-025-3513-6
language
English
LU publication?
yes
additional info
Publisher Copyright: © The Author(s) 2025.
id
dae0a7f4-a3ba-4b2b-8ded-b4356bd929e6
date added to LUP
2025-12-09 10:13:19
date last changed
2025-12-09 10:14:10
@article{dae0a7f4-a3ba-4b2b-8ded-b4356bd929e6,
  abstract     = {{<p>Perovskites have attracted widespread attention for laser applications due to their excellent optoelectronic properties. However, perovskite lasers typically exhibit a wavelength shift as pump density increases. Here, we report a pump-induced wavelength shift-free laser achieved using a perovskite nanoplatelet with mixed orthorhombic and tetragonal phase. At 293 K, the tetragonal-phase perovskite nanoplatelet laser exhibits a blue shift of ~0.4 nm µJ<sup>−1</sup> cm<sup>2</sup> with increasing pump density. In contrast, at 80 K, the orthorhombic-phase perovskite nanoplatelet laser exhibits a red shift of ~1 nm µJ<sup>−1</sup> cm<sup>2</sup>. By stabilizing the perovskite nanoplatelet in a mixed orthorhombic-tetragonal phase at 163 K, the pump induced wavelength shifts are completely suppressed, resulting in a wavelength-stable laser. Additionally, the lasing threshold decreases from 18.4 µJ cm<sup>−2</sup> at room temperature to 4.5 µJ cm<sup>−2</sup> at 163 K. This study presents a promising strategy for achieving pump-insensitive wavelength stability in micro/nano lasers.</p>}},
  author       = {{Li, Guohui and Ji, Yulong and Zhao, Ruofan and Xue, Lin and Zhang, Ye and Zheng, Kaibo and Cui, Yanxia}},
  issn         = {{2095-8226}},
  keywords     = {{laser; mixed phase; perovskite nanoplatelet; stable-wavelength}},
  language     = {{eng}},
  number       = {{11}},
  pages        = {{4025--4031}},
  publisher    = {{Science China Press}},
  series       = {{SCIENCE CHINA Materials}},
  title        = {{Stable-wavelength perovskite nanoplatelet laser via mixed-phase engineering}},
  url          = {{http://dx.doi.org/10.1007/s40843-025-3513-6}},
  doi          = {{10.1007/s40843-025-3513-6}},
  volume       = {{68}},
  year         = {{2025}},
}